diff --git a/src/main/java/dk/camelot64/kickc/test/bitmap-plotter.kc b/src/main/java/dk/camelot64/kickc/test/bitmap-plotter.kc
index 03fe3e6ae..b4c8f34d5 100644
--- a/src/main/java/dk/camelot64/kickc/test/bitmap-plotter.kc
+++ b/src/main/java/dk/camelot64/kickc/test/bitmap-plotter.kc
@@ -27,9 +27,9 @@ void main() {
     init_plot_tables();
     do {
         do {} while (*RASTER!=$ff);
-        *BGCOL = *BGCOL+1;
+        (*BGCOL)++;
         plots();
-        *BGCOL = *BGCOL-1;
+        (*BGCOL)--;
     } while (true);
 }
 
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.asm b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.asm
index e348f3645..bea04b769 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.asm
+++ b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.asm
@@ -40,15 +40,9 @@ main: {
     lda RASTER
     cmp #$ff
     bne b2
-    lda BGCOL
-    clc
-    adc #1
-    sta BGCOL
+    inc BGCOL
     jsr plots
-    lda BGCOL
-    sec
-    sbc #1
-    sta BGCOL
+    dec BGCOL
     jmp b2
     rts
 }
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.cfg b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.cfg
index 0ba617d1b..76c1eed94 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.cfg
+++ b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.cfg
@@ -18,111 +18,109 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   [7] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2 [ ] ( main:0 [ ] )
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] )
-  [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] )
-  [10] call plots param-assignment [ ] ( main:0 [ ] )
+  [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] )
+  [9] call plots param-assignment [ ] ( main:0 [ ] )
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] )
-  [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] )
-  [13] if(true) goto main::@2 [ ] ( main:0 [ ] )
+  [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] )
+  [11] if(true) goto main::@2 [ ] ( main:0 [ ] )
   to:main::@return
 main::@return: scope:[main]  from main::@7
-  [14] return  [ ] ( main:0 [ ] )
+  [12] return  [ ] ( main:0 [ ] )
   to:@return
 plots: scope:[plots]  from main::@3
-  [15] phi() [ ] ( main:0::plots:10 [ ] )
+  [13] phi() [ ] ( main:0::plots:9 [ ] )
   to:plots::@1
 plots::@1: scope:[plots]  from plots plots::@3
-  [16] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@3/(byte) plots::i#1 ) [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
-  [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] )
-  [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] )
-  [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
-  [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] )
-  [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  [14] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@3/(byte) plots::i#1 ) [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
+  [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] )
+  [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] )
+  [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
+  [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] )
+  [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
   to:plots::@3
 plots::@3: scope:[plots]  from plots::@1
-  [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] )
-  [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] )
+  [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] )
+  [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] )
   to:plots::@return
 plots::@return: scope:[plots]  from plots::@3
-  [24] return  [ ] ( main:0::plots:10 [ ] )
+  [22] return  [ ] ( main:0::plots:9 [ ] )
   to:@return
 plot: scope:[plot]  from plots::@1
-  [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] )
-  [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] )
-  [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] )
-  [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] )
-  [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] )
-  [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] )
-  [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] )
-  [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] )
-  [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] )
-  [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] )
-  [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] )
-  [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] )
+  [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] )
+  [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] )
+  [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] )
+  [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] )
+  [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] )
+  [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] )
+  [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] )
+  [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] )
+  [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] )
+  [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] )
+  [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
   to:plot::@return
 plot::@return: scope:[plot]  from plot
-  [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
   to:@return
 init_plot_tables: scope:[init_plot_tables]  from main::@5
-  [38] phi() [ ] ( main:0::init_plot_tables:6 [ ] )
+  [36] phi() [ ] ( main:0::init_plot_tables:6 [ ] )
   to:init_plot_tables::@1
 init_plot_tables::@1: scope:[init_plot_tables]  from init_plot_tables init_plot_tables::@2
-  [39] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@2/(byte) init_plot_tables::bits#4 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [39] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@2/(byte) init_plot_tables::x#1 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] )
-  [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] )
-  [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] )
+  [37] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@2/(byte) init_plot_tables::bits#4 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [37] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@2/(byte) init_plot_tables::x#1 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] )
+  [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] )
+  [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] )
   to:init_plot_tables::@2
 init_plot_tables::@2: scope:[init_plot_tables]  from init_plot_tables::@1 init_plot_tables::@10
-  [46] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte) init_plot_tables::bits#1 init_plot_tables::@1/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#4 ] )
-  [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
-  [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
+  [44] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte) init_plot_tables::bits#1 init_plot_tables::@1/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#4 ] )
+  [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
+  [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
   to:init_plot_tables::@3
 init_plot_tables::@3: scope:[init_plot_tables]  from init_plot_tables::@2 init_plot_tables::@4
-  [49] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@4/(byte*) init_plot_tables::yoffs#4 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [49] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@4/(byte) init_plot_tables::y#1 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] )
-  [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] )
-  [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] )
-  [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] )
-  [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] )
-  [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [47] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@4/(byte*) init_plot_tables::yoffs#4 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [47] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@4/(byte) init_plot_tables::y#1 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] )
+  [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] )
+  [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] )
+  [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] )
+  [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] )
+  [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
   to:init_plot_tables::@7
 init_plot_tables::@7: scope:[init_plot_tables]  from init_plot_tables::@3
-  [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] )
+  [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] )
   to:init_plot_tables::@4
 init_plot_tables::@4: scope:[init_plot_tables]  from init_plot_tables::@3 init_plot_tables::@7
-  [59] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@3/(byte*) init_plot_tables::yoffs#2 init_plot_tables::@7/(byte*) init_plot_tables::yoffs#1 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] )
-  [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
-  [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
+  [57] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@3/(byte*) init_plot_tables::yoffs#2 init_plot_tables::@7/(byte*) init_plot_tables::yoffs#1 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] )
+  [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
+  [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
   to:init_plot_tables::@return
 init_plot_tables::@return: scope:[init_plot_tables]  from init_plot_tables::@4
-  [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
   to:@return
 init_plot_tables::@10: scope:[init_plot_tables]  from init_plot_tables::@1
   to:init_plot_tables::@2
 init_screen: scope:[init_screen]  from main
-  [63] phi() [ ] ( main:0::init_screen:5 [ ] )
+  [61] phi() [ ] ( main:0::init_screen:5 [ ] )
   to:init_screen::@1
 init_screen::@1: scope:[init_screen]  from init_screen init_screen::@1
-  [64] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@1/(byte*) init_screen::b#1 ) [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
-  [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
-  [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
-  [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
+  [62] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@1/(byte*) init_screen::b#1 ) [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
+  [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
+  [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
+  [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
   to:init_screen::@2
 init_screen::@2: scope:[init_screen]  from init_screen::@1 init_screen::@2
-  [68] (byte*) init_screen::c#2 ← phi( init_screen::@2/(byte*) init_screen::c#1 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
-  [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
-  [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
-  [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
+  [66] (byte*) init_screen::c#2 ← phi( init_screen::@2/(byte*) init_screen::c#1 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
+  [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
+  [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
+  [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
   to:init_screen::@return
 init_screen::@return: scope:[init_screen]  from init_screen::@2
-  [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  [70] return  [ ] ( main:0::init_screen:5 [ ] )
   to:@return
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.log b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.log
index b7fa5ecdf..3dca6e3e0 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.log
+++ b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.log
@@ -27,9 +27,9 @@ void main() {
     init_plot_tables();
     do {
         do {} while (*RASTER!=$ff);
-        *BGCOL = *BGCOL+1;
+        (*BGCOL)++;
         plots();
-        *BGCOL = *BGCOL-1;
+        (*BGCOL)--;
     } while (true);
 }
 
@@ -90,6 +90,8 @@ void init_screen() {
     }
 }
 
+Adding pre/post-modifier *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
+Adding pre/post-modifier *((byte*) BGCOL) ← -- *((byte*) BGCOL)
 Adding pre/post-modifier (byte) plots::i ← ++ (byte) plots::i
 Adding pre/post-modifier (byte*) init_screen::b ← ++ (byte*) init_screen::b
 Adding pre/post-modifier (byte*) init_screen::c ← ++ (byte*) init_screen::c
@@ -128,11 +130,9 @@ main::@1:
 main::@2:
   (boolean~) main::$5 ← *((byte*) RASTER) != (byte) 255
   if((boolean~) main::$5) goto main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$6
-  (void~) main::$7 ← call plots 
-  (byte~) main::$8 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$8
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
+  (void~) main::$6 ← call plots 
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
 main::@return:
   return 
@@ -296,9 +296,7 @@ SYMBOLS
 (void~) main::$3
 (void~) main::$4
 (boolean~) main::$5
-(byte~) main::$6
-(void~) main::$7
-(byte~) main::$8
+(void~) main::$6
 (label) main::@1
 (label) main::@2
 (label) main::@return
@@ -370,11 +368,9 @@ main::@2: scope:[main]  from main::@1 main::@2
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$6
-  (void~) main::$7 ← call plots 
-  (byte~) main::$8 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$8
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
+  (void~) main::$6 ← call plots 
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
   to:main::@4
 main::@4: scope:[main]  from main::@3
@@ -561,11 +557,9 @@ main::@2: scope:[main]  from main main::@1 main::@2
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$6
-  (void~) main::$7 ← call plots 
-  (byte~) main::$8 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$8
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
+  (void~) main::$6 ← call plots 
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@3
@@ -740,13 +734,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$6
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$8
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -1004,8 +996,7 @@ main::@3: scope:[main]  from main::@2
   (byte[]) plots_y#4 ← phi( main::@2/(byte[]) plots_y#5 )
   (byte[]) plots_x#4 ← phi( main::@2/(byte[]) plots_x#5 )
   (byte*) BGCOL#2 ← phi( main::@2/(byte*) BGCOL#5 )
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
@@ -1019,8 +1010,7 @@ main::@7: scope:[main]  from main::@3
   (byte[]) plots_x#9 ← phi( main::@3/(byte[]) plots_x#4 )
   (byte*) RASTER#5 ← phi( main::@3/(byte*) RASTER#7 )
   (byte*) BGCOL#3 ← phi( main::@3/(byte*) BGCOL#2 )
-  (byte~) main::$8 ← *((byte*) BGCOL#3) - (byte) 1
-  *((byte*) BGCOL#3) ← (byte~) main::$8
+  *((byte*) BGCOL#3) ← -- *((byte*) BGCOL#3)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -1393,8 +1383,7 @@ main::@3: scope:[main]  from main::@2
   (byte[]) plots_y#4 ← phi( main::@2/(byte[]) plots_y#5 )
   (byte[]) plots_x#4 ← phi( main::@2/(byte[]) plots_x#5 )
   (byte*) BGCOL#2 ← phi( main::@2/(byte*) BGCOL#5 )
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
@@ -1408,8 +1397,7 @@ main::@7: scope:[main]  from main::@3
   (byte[]) plots_x#9 ← phi( main::@3/(byte[]) plots_x#4 )
   (byte*) RASTER#5 ← phi( main::@3/(byte*) RASTER#7 )
   (byte*) BGCOL#3 ← phi( main::@3/(byte*) BGCOL#2 )
-  (byte~) main::$8 ← *((byte*) BGCOL#3) - (byte) 1
-  *((byte*) BGCOL#3) ← (byte~) main::$8
+  *((byte*) BGCOL#3) ← -- *((byte*) BGCOL#3)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -1844,8 +1832,6 @@ INITIAL SSA SYMBOL TABLE
 (byte~) main::$1
 (byte~) main::$2
 (boolean~) main::$5
-(byte~) main::$6
-(byte~) main::$8
 (label) main::@1
 (label) main::@2
 (label) main::@3
@@ -2143,8 +2129,7 @@ main::@3: scope:[main]  from main::@2
   (byte[]) plots_y#4 ← phi( main::@2/(byte[]) plots_y#5 )
   (byte[]) plots_x#4 ← phi( main::@2/(byte[]) plots_x#5 )
   (byte*) BGCOL#2 ← phi( main::@2/(byte*) BGCOL#5 )
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
@@ -2158,8 +2143,7 @@ main::@7: scope:[main]  from main::@3
   (byte[]) plots_x#9 ← phi( main::@3/(byte[]) plots_x#4 )
   (byte*) RASTER#5 ← phi( main::@3/(byte*) RASTER#7 )
   (byte*) BGCOL#3 ← phi( main::@3/(byte*) BGCOL#2 )
-  (byte~) main::$8 ← *((byte*) BGCOL#3) - (byte) 1
-  *((byte*) BGCOL#3) ← (byte~) main::$8
+  *((byte*) BGCOL#3) ← -- *((byte*) BGCOL#3)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -2533,8 +2517,7 @@ main::@3: scope:[main]  from main::@2
   (byte[]) plots_y#4 ← phi( main::@2/(byte[]) plots_y#5 )
   (byte[]) plots_x#4 ← phi( main::@2/(byte[]) plots_x#5 )
   (byte*) BGCOL#2 ← phi( main::@2/(byte*) BGCOL#5 )
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
@@ -2548,8 +2531,7 @@ main::@7: scope:[main]  from main::@3
   (byte[]) plots_x#9 ← phi( main::@3/(byte[]) plots_x#4 )
   (byte*) RASTER#5 ← phi( main::@3/(byte*) RASTER#7 )
   (byte*) BGCOL#3 ← phi( main::@3/(byte*) BGCOL#2 )
-  (byte~) main::$8 ← *((byte*) BGCOL#3) - (byte) 1
-  *((byte*) BGCOL#3) ← (byte~) main::$8
+  *((byte*) BGCOL#3) ← -- *((byte*) BGCOL#3)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -2921,13 +2903,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$8
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -3173,13 +3153,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$8
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -3446,13 +3424,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL#2) + (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$6
+  *((byte*) BGCOL#2) ← ++ *((byte*) BGCOL#2)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$8
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -3682,13 +3658,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if((boolean~) main::$5) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL#0) + (byte) 1
-  *((byte*) BGCOL#0) ← (byte~) main::$6
+  *((byte*) BGCOL#0) ← ++ *((byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((byte*) BGCOL#0) - (byte) 1
-  *((byte*) BGCOL#0) ← (byte~) main::$8
+  *((byte*) BGCOL#0) ← -- *((byte*) BGCOL#0)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -3877,13 +3851,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if(*((byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((byte*) BGCOL#0) + (byte) 1
-  *((byte*) BGCOL#0) ← (byte~) main::$6
+  *((byte*) BGCOL#0) ← ++ *((byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((byte*) BGCOL#0) - (byte) 1
-  *((byte*) BGCOL#0) ← (byte~) main::$8
+  *((byte*) BGCOL#0) ← -- *((byte*) BGCOL#0)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -4073,13 +4045,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -4226,13 +4196,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -4368,13 +4336,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -4509,13 +4475,11 @@ main::@2: scope:[main]  from main::@1 main::@2 main::@6
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@1
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -4665,13 +4629,11 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -4864,13 +4826,11 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -5049,8 +5009,6 @@ FINAL SYMBOL TABLE
 (byte*) init_screen::c#1
 (byte*) init_screen::c#2
 (void()) main()
-(byte~) main::$6
-(byte~) main::$8
 (label) main::@2
 (label) main::@3
 (label) main::@5
@@ -5132,13 +5090,11 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$6
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   call plots param-assignment
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$8
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@return: scope:[main]  from main::@7
@@ -5267,8 +5223,8 @@ Adding NOP phi() at start of init_plot_tables
 Adding NOP phi() at start of init_screen
 CALL GRAPH
 Calls in [] to main:0 
-Calls in [main] to init_screen:5 init_plot_tables:6 plots:10 
-Calls in [plots] to plot:21 
+Calls in [main] to init_screen:5 init_plot_tables:6 plots:9 
+Calls in [plots] to plot:19 
 
 Propagating live ranges...
 Propagating live ranges...
@@ -5299,150 +5255,148 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   [7] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2 [ ]
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ]
-  [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ]
-  [10] call plots param-assignment [ ]
+  [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ]
+  [9] call plots param-assignment [ ]
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ]
-  [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ]
-  [13] if(true) goto main::@2 [ ]
+  [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ]
+  [11] if(true) goto main::@2 [ ]
   to:main::@return
 main::@return: scope:[main]  from main::@7
-  [14] return  [ ]
+  [12] return  [ ]
   to:@return
 plots: scope:[plots]  from main::@3
-  [15] phi() [ ]
+  [13] phi() [ ]
   to:plots::@1
 plots::@1: scope:[plots]  from plots plots::@4
-  [16] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@4/(byte~) plots::i#4 ) [ plots::i#2 ]
-  [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ]
-  [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ]
-  [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ]
-  [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ]
-  [21] call plot param-assignment [ plots::i#2 ]
+  [14] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@4/(byte~) plots::i#4 ) [ plots::i#2 ]
+  [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ]
+  [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ]
+  [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ]
+  [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ]
+  [19] call plot param-assignment [ plots::i#2 ]
   to:plots::@3
 plots::@3: scope:[plots]  from plots::@1
-  [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ]
-  [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@4 [ plots::i#1 ]
+  [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ]
+  [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@4 [ plots::i#1 ]
   to:plots::@return
 plots::@return: scope:[plots]  from plots::@3
-  [24] return  [ ]
+  [22] return  [ ]
   to:@return
 plots::@4: scope:[plots]  from plots::@3
-  [25] (byte~) plots::i#4 ← (byte) plots::i#1 [ plots::i#4 ]
+  [23] (byte~) plots::i#4 ← (byte) plots::i#1 [ plots::i#4 ]
   to:plots::@1
 plot: scope:[plot]  from plots::@1
-  [26] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ]
-  [27] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ]
-  [28] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ]
-  [29] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ]
-  [30] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ]
-  [31] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ]
-  [32] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ]
-  [33] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ]
-  [34] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ]
-  [35] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ]
-  [36] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ]
-  [37] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ]
+  [24] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ]
+  [25] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ]
+  [26] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ]
+  [27] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ]
+  [28] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ]
+  [29] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ]
+  [30] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ]
+  [31] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ]
+  [32] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ]
+  [33] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ]
+  [34] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ]
+  [35] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ]
   to:plot::@return
 plot::@return: scope:[plot]  from plot
-  [38] return  [ ]
+  [36] return  [ ]
   to:@return
 init_plot_tables: scope:[init_plot_tables]  from main::@5
-  [39] phi() [ ]
+  [37] phi() [ ]
   to:init_plot_tables::@1
 init_plot_tables::@1: scope:[init_plot_tables]  from init_plot_tables init_plot_tables::@9
-  [40] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@9/(byte~) init_plot_tables::bits#5 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [40] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@9/(byte~) init_plot_tables::x#5 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [41] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ]
-  [42] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [43] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [44] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [45] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ]
-  [46] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 init_plot_tables::bits#1 ]
+  [38] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@9/(byte~) init_plot_tables::bits#5 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [38] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@9/(byte~) init_plot_tables::x#5 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [39] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ]
+  [40] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [41] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [42] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [43] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ]
+  [44] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 init_plot_tables::bits#1 ]
   to:init_plot_tables::@5
 init_plot_tables::@5: scope:[init_plot_tables]  from init_plot_tables::@1
   to:init_plot_tables::@2
 init_plot_tables::@2: scope:[init_plot_tables]  from init_plot_tables::@10 init_plot_tables::@5
-  [47] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte~) init_plot_tables::bits#6 init_plot_tables::@5/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ]
-  [48] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::bits#4 init_plot_tables::x#1 ]
-  [49] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@9 [ init_plot_tables::bits#4 init_plot_tables::x#1 ]
+  [45] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte~) init_plot_tables::bits#6 init_plot_tables::@5/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ]
+  [46] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::bits#4 init_plot_tables::x#1 ]
+  [47] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@9 [ init_plot_tables::bits#4 init_plot_tables::x#1 ]
   to:init_plot_tables::@3
 init_plot_tables::@3: scope:[init_plot_tables]  from init_plot_tables::@11 init_plot_tables::@2
-  [50] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@11/(byte*~) init_plot_tables::yoffs#5 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [50] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@11/(byte~) init_plot_tables::y#5 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [51] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ]
-  [52] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ]
-  [53] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ]
-  [54] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [55] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ]
-  [56] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [57] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ]
-  [58] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@12 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [48] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@11/(byte*~) init_plot_tables::yoffs#5 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [48] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@11/(byte~) init_plot_tables::y#5 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [49] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ]
+  [50] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ]
+  [51] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ]
+  [52] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [53] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ]
+  [54] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [55] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ]
+  [56] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@12 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
   to:init_plot_tables::@7
 init_plot_tables::@7: scope:[init_plot_tables]  from init_plot_tables::@3
-  [59] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ]
-  [60] (byte*~) init_plot_tables::yoffs#7 ← (byte*) init_plot_tables::yoffs#1 [ init_plot_tables::y#2 init_plot_tables::yoffs#7 ]
+  [57] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ]
+  [58] (byte*~) init_plot_tables::yoffs#7 ← (byte*) init_plot_tables::yoffs#1 [ init_plot_tables::y#2 init_plot_tables::yoffs#7 ]
   to:init_plot_tables::@4
 init_plot_tables::@4: scope:[init_plot_tables]  from init_plot_tables::@12 init_plot_tables::@7
-  [61] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@12/(byte*~) init_plot_tables::yoffs#6 init_plot_tables::@7/(byte*~) init_plot_tables::yoffs#7 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ]
-  [62] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::yoffs#4 init_plot_tables::y#1 ]
-  [63] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@11 [ init_plot_tables::yoffs#4 init_plot_tables::y#1 ]
+  [59] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@12/(byte*~) init_plot_tables::yoffs#6 init_plot_tables::@7/(byte*~) init_plot_tables::yoffs#7 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ]
+  [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::yoffs#4 init_plot_tables::y#1 ]
+  [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@11 [ init_plot_tables::yoffs#4 init_plot_tables::y#1 ]
   to:init_plot_tables::@return
 init_plot_tables::@return: scope:[init_plot_tables]  from init_plot_tables::@4
-  [64] return  [ ]
+  [62] return  [ ]
   to:@return
 init_plot_tables::@11: scope:[init_plot_tables]  from init_plot_tables::@4
-  [65] (byte~) init_plot_tables::y#5 ← (byte) init_plot_tables::y#1 [ init_plot_tables::y#5 init_plot_tables::yoffs#4 ]
-  [66] (byte*~) init_plot_tables::yoffs#5 ← (byte*) init_plot_tables::yoffs#4 [ init_plot_tables::y#5 init_plot_tables::yoffs#5 ]
+  [63] (byte~) init_plot_tables::y#5 ← (byte) init_plot_tables::y#1 [ init_plot_tables::y#5 init_plot_tables::yoffs#4 ]
+  [64] (byte*~) init_plot_tables::yoffs#5 ← (byte*) init_plot_tables::yoffs#4 [ init_plot_tables::y#5 init_plot_tables::yoffs#5 ]
   to:init_plot_tables::@3
 init_plot_tables::@12: scope:[init_plot_tables]  from init_plot_tables::@3
-  [67] (byte*~) init_plot_tables::yoffs#6 ← (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#6 ]
+  [65] (byte*~) init_plot_tables::yoffs#6 ← (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#6 ]
   to:init_plot_tables::@4
 init_plot_tables::@9: scope:[init_plot_tables]  from init_plot_tables::@2
-  [68] (byte~) init_plot_tables::x#5 ← (byte) init_plot_tables::x#1 [ init_plot_tables::x#5 init_plot_tables::bits#4 ]
-  [69] (byte~) init_plot_tables::bits#5 ← (byte) init_plot_tables::bits#4 [ init_plot_tables::x#5 init_plot_tables::bits#5 ]
+  [66] (byte~) init_plot_tables::x#5 ← (byte) init_plot_tables::x#1 [ init_plot_tables::x#5 init_plot_tables::bits#4 ]
+  [67] (byte~) init_plot_tables::bits#5 ← (byte) init_plot_tables::bits#4 [ init_plot_tables::x#5 init_plot_tables::bits#5 ]
   to:init_plot_tables::@1
 init_plot_tables::@10: scope:[init_plot_tables]  from init_plot_tables::@1
-  [70] (byte~) init_plot_tables::bits#6 ← (byte) init_plot_tables::bits#1 [ init_plot_tables::x#2 init_plot_tables::bits#6 ]
+  [68] (byte~) init_plot_tables::bits#6 ← (byte) init_plot_tables::bits#1 [ init_plot_tables::x#2 init_plot_tables::bits#6 ]
   to:init_plot_tables::@2
 init_screen: scope:[init_screen]  from main
-  [71] phi() [ ]
+  [69] phi() [ ]
   to:init_screen::@1
 init_screen::@1: scope:[init_screen]  from init_screen init_screen::@5
-  [72] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@5/(byte*~) init_screen::b#3 ) [ init_screen::b#2 ]
-  [73] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ]
-  [74] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ]
-  [75] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@5 [ init_screen::b#1 ]
+  [70] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@5/(byte*~) init_screen::b#3 ) [ init_screen::b#2 ]
+  [71] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ]
+  [72] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ]
+  [73] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@5 [ init_screen::b#1 ]
   to:init_screen::@2
 init_screen::@2: scope:[init_screen]  from init_screen::@1 init_screen::@6
-  [76] (byte*) init_screen::c#2 ← phi( init_screen::@6/(byte*~) init_screen::c#3 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ]
-  [77] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ]
-  [78] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ]
-  [79] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@6 [ init_screen::c#1 ]
+  [74] (byte*) init_screen::c#2 ← phi( init_screen::@6/(byte*~) init_screen::c#3 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ]
+  [75] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ]
+  [76] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ]
+  [77] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@6 [ init_screen::c#1 ]
   to:init_screen::@return
 init_screen::@return: scope:[init_screen]  from init_screen::@2
-  [80] return  [ ]
+  [78] return  [ ]
   to:@return
 init_screen::@6: scope:[init_screen]  from init_screen::@2
-  [81] (byte*~) init_screen::c#3 ← (byte*) init_screen::c#1 [ init_screen::c#3 ]
+  [79] (byte*~) init_screen::c#3 ← (byte*) init_screen::c#1 [ init_screen::c#3 ]
   to:init_screen::@2
 init_screen::@5: scope:[init_screen]  from init_screen::@1
-  [82] (byte*~) init_screen::b#3 ← (byte*) init_screen::b#1 [ init_screen::b#3 ]
+  [80] (byte*~) init_screen::b#3 ← (byte*) init_screen::b#1 [ init_screen::b#3 ]
   to:init_screen::@1
 
 Created 9 initial phi equivalence classes
-Coalesced [25] plots::i#4 ← plots::i#1
-Coalesced [60] init_plot_tables::yoffs#7 ← init_plot_tables::yoffs#1
-Coalesced [65] init_plot_tables::y#5 ← init_plot_tables::y#1
-Coalesced [66] init_plot_tables::yoffs#5 ← init_plot_tables::yoffs#4
-Coalesced (already) [67] init_plot_tables::yoffs#6 ← init_plot_tables::yoffs#2
-Coalesced [68] init_plot_tables::x#5 ← init_plot_tables::x#1
-Coalesced [69] init_plot_tables::bits#5 ← init_plot_tables::bits#4
-Coalesced [70] init_plot_tables::bits#6 ← init_plot_tables::bits#1
-Coalesced [81] init_screen::c#3 ← init_screen::c#1
-Coalesced [82] init_screen::b#3 ← init_screen::b#1
+Coalesced [23] plots::i#4 ← plots::i#1
+Coalesced [58] init_plot_tables::yoffs#7 ← init_plot_tables::yoffs#1
+Coalesced [63] init_plot_tables::y#5 ← init_plot_tables::y#1
+Coalesced [64] init_plot_tables::yoffs#5 ← init_plot_tables::yoffs#4
+Coalesced (already) [65] init_plot_tables::yoffs#6 ← init_plot_tables::yoffs#2
+Coalesced [66] init_plot_tables::x#5 ← init_plot_tables::x#1
+Coalesced [67] init_plot_tables::bits#5 ← init_plot_tables::bits#4
+Coalesced [68] init_plot_tables::bits#6 ← init_plot_tables::bits#1
+Coalesced [79] init_screen::c#3 ← init_screen::c#1
+Coalesced [80] init_screen::b#3 ← init_screen::b#1
 Coalesced down to 7 phi equivalence classes
 Culled Empty Block (label) plots::@4
 Culled Empty Block (label) init_plot_tables::@5
@@ -5485,113 +5439,111 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   [7] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2 [ ]
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ]
-  [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ]
-  [10] call plots param-assignment [ ]
+  [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ]
+  [9] call plots param-assignment [ ]
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ]
-  [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ]
-  [13] if(true) goto main::@2 [ ]
+  [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ]
+  [11] if(true) goto main::@2 [ ]
   to:main::@return
 main::@return: scope:[main]  from main::@7
-  [14] return  [ ]
+  [12] return  [ ]
   to:@return
 plots: scope:[plots]  from main::@3
-  [15] phi() [ ]
+  [13] phi() [ ]
   to:plots::@1
 plots::@1: scope:[plots]  from plots plots::@3
-  [16] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@3/(byte) plots::i#1 ) [ plots::i#2 ]
-  [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ]
-  [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ]
-  [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ]
-  [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ]
-  [21] call plot param-assignment [ plots::i#2 ]
+  [14] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@3/(byte) plots::i#1 ) [ plots::i#2 ]
+  [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ]
+  [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ]
+  [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ]
+  [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ]
+  [19] call plot param-assignment [ plots::i#2 ]
   to:plots::@3
 plots::@3: scope:[plots]  from plots::@1
-  [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ]
-  [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ]
+  [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ]
+  [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ]
   to:plots::@return
 plots::@return: scope:[plots]  from plots::@3
-  [24] return  [ ]
+  [22] return  [ ]
   to:@return
 plot: scope:[plot]  from plots::@1
-  [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ]
-  [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ]
-  [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ]
-  [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ]
-  [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ]
-  [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ]
-  [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ]
-  [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ]
-  [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ]
-  [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ]
-  [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ]
-  [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ]
+  [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ]
+  [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ]
+  [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ]
+  [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ]
+  [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ]
+  [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ]
+  [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ]
+  [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ]
+  [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ]
+  [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ]
+  [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ]
+  [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ]
   to:plot::@return
 plot::@return: scope:[plot]  from plot
-  [37] return  [ ]
+  [35] return  [ ]
   to:@return
 init_plot_tables: scope:[init_plot_tables]  from main::@5
-  [38] phi() [ ]
+  [36] phi() [ ]
   to:init_plot_tables::@1
 init_plot_tables::@1: scope:[init_plot_tables]  from init_plot_tables init_plot_tables::@2
-  [39] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@2/(byte) init_plot_tables::bits#4 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [39] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@2/(byte) init_plot_tables::x#1 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ]
-  [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
-  [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ]
-  [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ]
+  [37] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@2/(byte) init_plot_tables::bits#4 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [37] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@2/(byte) init_plot_tables::x#1 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ]
+  [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ]
+  [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ]
+  [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ]
   to:init_plot_tables::@2
 init_plot_tables::@2: scope:[init_plot_tables]  from init_plot_tables::@1 init_plot_tables::@10
-  [46] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte) init_plot_tables::bits#1 init_plot_tables::@1/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ]
-  [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ]
-  [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ]
+  [44] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte) init_plot_tables::bits#1 init_plot_tables::@1/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ]
+  [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ]
+  [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ]
   to:init_plot_tables::@3
 init_plot_tables::@3: scope:[init_plot_tables]  from init_plot_tables::@2 init_plot_tables::@4
-  [49] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@4/(byte*) init_plot_tables::yoffs#4 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [49] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@4/(byte) init_plot_tables::y#1 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ]
-  [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ]
-  [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ]
-  [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ]
-  [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
-  [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ]
-  [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [47] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@4/(byte*) init_plot_tables::yoffs#4 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [47] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@4/(byte) init_plot_tables::y#1 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ]
+  [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ]
+  [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ]
+  [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ]
+  [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
+  [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ]
+  [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ]
   to:init_plot_tables::@7
 init_plot_tables::@7: scope:[init_plot_tables]  from init_plot_tables::@3
-  [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ]
+  [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ]
   to:init_plot_tables::@4
 init_plot_tables::@4: scope:[init_plot_tables]  from init_plot_tables::@3 init_plot_tables::@7
-  [59] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@3/(byte*) init_plot_tables::yoffs#2 init_plot_tables::@7/(byte*) init_plot_tables::yoffs#1 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ]
-  [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ]
-  [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ]
+  [57] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@3/(byte*) init_plot_tables::yoffs#2 init_plot_tables::@7/(byte*) init_plot_tables::yoffs#1 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ]
+  [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ]
+  [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ]
   to:init_plot_tables::@return
 init_plot_tables::@return: scope:[init_plot_tables]  from init_plot_tables::@4
-  [62] return  [ ]
+  [60] return  [ ]
   to:@return
 init_plot_tables::@10: scope:[init_plot_tables]  from init_plot_tables::@1
   to:init_plot_tables::@2
 init_screen: scope:[init_screen]  from main
-  [63] phi() [ ]
+  [61] phi() [ ]
   to:init_screen::@1
 init_screen::@1: scope:[init_screen]  from init_screen init_screen::@1
-  [64] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@1/(byte*) init_screen::b#1 ) [ init_screen::b#2 ]
-  [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ]
-  [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ]
-  [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ]
+  [62] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@1/(byte*) init_screen::b#1 ) [ init_screen::b#2 ]
+  [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ]
+  [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ]
+  [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ]
   to:init_screen::@2
 init_screen::@2: scope:[init_screen]  from init_screen::@1 init_screen::@2
-  [68] (byte*) init_screen::c#2 ← phi( init_screen::@2/(byte*) init_screen::c#1 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ]
-  [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ]
-  [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ]
-  [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ]
+  [66] (byte*) init_screen::c#2 ← phi( init_screen::@2/(byte*) init_screen::c#1 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ]
+  [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ]
+  [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ]
+  [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ]
   to:init_screen::@return
 init_screen::@return: scope:[init_screen]  from init_screen::@2
-  [72] return  [ ]
+  [70] return  [ ]
   to:@return
 
 CONTROL FLOW GRAPH - PHI MEM COALESCED
@@ -5615,113 +5567,111 @@ main::@2: scope:[main]  from main::@2 main::@5 main::@7
   [7] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2 [ ] ( main:0 [ ] )
   to:main::@3
 main::@3: scope:[main]  from main::@2
-  [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] )
-  [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] )
-  [10] call plots param-assignment [ ] ( main:0 [ ] )
+  [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] )
+  [9] call plots param-assignment [ ] ( main:0 [ ] )
   to:main::@7
 main::@7: scope:[main]  from main::@3
-  [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] )
-  [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] )
-  [13] if(true) goto main::@2 [ ] ( main:0 [ ] )
+  [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] )
+  [11] if(true) goto main::@2 [ ] ( main:0 [ ] )
   to:main::@return
 main::@return: scope:[main]  from main::@7
-  [14] return  [ ] ( main:0 [ ] )
+  [12] return  [ ] ( main:0 [ ] )
   to:@return
 plots: scope:[plots]  from main::@3
-  [15] phi() [ ] ( main:0::plots:10 [ ] )
+  [13] phi() [ ] ( main:0::plots:9 [ ] )
   to:plots::@1
 plots::@1: scope:[plots]  from plots plots::@3
-  [16] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@3/(byte) plots::i#1 ) [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
-  [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] )
-  [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] )
-  [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
-  [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] )
-  [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  [14] (byte) plots::i#2 ← phi( plots/(byte) 0 plots::@3/(byte) plots::i#1 ) [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
+  [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] )
+  [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] )
+  [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
+  [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] )
+  [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
   to:plots::@3
 plots::@3: scope:[plots]  from plots::@1
-  [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] )
-  [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] )
+  [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] )
+  [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] )
   to:plots::@return
 plots::@return: scope:[plots]  from plots::@3
-  [24] return  [ ] ( main:0::plots:10 [ ] )
+  [22] return  [ ] ( main:0::plots:9 [ ] )
   to:@return
 plot: scope:[plot]  from plots::@1
-  [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] )
-  [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] )
-  [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] )
-  [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] )
-  [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] )
-  [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] )
-  [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] )
-  [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] )
-  [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] )
-  [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] )
-  [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] )
-  [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] )
+  [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] )
+  [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] )
+  [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] )
+  [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] )
+  [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] )
+  [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] )
+  [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] )
+  [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] )
+  [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] )
+  [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] )
+  [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
   to:plot::@return
 plot::@return: scope:[plot]  from plot
-  [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
   to:@return
 init_plot_tables: scope:[init_plot_tables]  from main::@5
-  [38] phi() [ ] ( main:0::init_plot_tables:6 [ ] )
+  [36] phi() [ ] ( main:0::init_plot_tables:6 [ ] )
   to:init_plot_tables::@1
 init_plot_tables::@1: scope:[init_plot_tables]  from init_plot_tables init_plot_tables::@2
-  [39] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@2/(byte) init_plot_tables::bits#4 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [39] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@2/(byte) init_plot_tables::x#1 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] )
-  [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
-  [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] )
-  [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] )
+  [37] (byte) init_plot_tables::bits#3 ← phi( init_plot_tables/(byte) 128 init_plot_tables::@2/(byte) init_plot_tables::bits#4 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [37] (byte) init_plot_tables::x#2 ← phi( init_plot_tables/(byte) 0 init_plot_tables::@2/(byte) init_plot_tables::x#1 ) [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] )
+  [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] )
+  [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] )
+  [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] )
   to:init_plot_tables::@2
 init_plot_tables::@2: scope:[init_plot_tables]  from init_plot_tables::@1 init_plot_tables::@10
-  [46] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte) init_plot_tables::bits#1 init_plot_tables::@1/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#4 ] )
-  [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
-  [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
+  [44] (byte) init_plot_tables::bits#4 ← phi( init_plot_tables::@10/(byte) init_plot_tables::bits#1 init_plot_tables::@1/(byte) 128 ) [ init_plot_tables::x#2 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#4 ] )
+  [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
+  [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] )
   to:init_plot_tables::@3
 init_plot_tables::@3: scope:[init_plot_tables]  from init_plot_tables::@2 init_plot_tables::@4
-  [49] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@4/(byte*) init_plot_tables::yoffs#4 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [49] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@4/(byte) init_plot_tables::y#1 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] )
-  [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] )
-  [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] )
-  [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] )
-  [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
-  [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] )
-  [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [47] (byte*) init_plot_tables::yoffs#2 ← phi( init_plot_tables::@4/(byte*) init_plot_tables::yoffs#4 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [47] (byte) init_plot_tables::y#2 ← phi( init_plot_tables::@4/(byte) init_plot_tables::y#1 init_plot_tables::@2/(byte) 0 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] )
+  [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] )
+  [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] )
+  [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] )
+  [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
+  [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] )
+  [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] )
   to:init_plot_tables::@7
 init_plot_tables::@7: scope:[init_plot_tables]  from init_plot_tables::@3
-  [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] )
+  [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] )
   to:init_plot_tables::@4
 init_plot_tables::@4: scope:[init_plot_tables]  from init_plot_tables::@3 init_plot_tables::@7
-  [59] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@3/(byte*) init_plot_tables::yoffs#2 init_plot_tables::@7/(byte*) init_plot_tables::yoffs#1 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] )
-  [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
-  [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
+  [57] (byte*) init_plot_tables::yoffs#4 ← phi( init_plot_tables::@3/(byte*) init_plot_tables::yoffs#2 init_plot_tables::@7/(byte*) init_plot_tables::yoffs#1 ) [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#4 ] )
+  [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
+  [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] )
   to:init_plot_tables::@return
 init_plot_tables::@return: scope:[init_plot_tables]  from init_plot_tables::@4
-  [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
   to:@return
 init_plot_tables::@10: scope:[init_plot_tables]  from init_plot_tables::@1
   to:init_plot_tables::@2
 init_screen: scope:[init_screen]  from main
-  [63] phi() [ ] ( main:0::init_screen:5 [ ] )
+  [61] phi() [ ] ( main:0::init_screen:5 [ ] )
   to:init_screen::@1
 init_screen::@1: scope:[init_screen]  from init_screen init_screen::@1
-  [64] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@1/(byte*) init_screen::b#1 ) [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
-  [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
-  [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
-  [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
+  [62] (byte*) init_screen::b#2 ← phi( init_screen/(const byte*) BITMAP#0 init_screen::@1/(byte*) init_screen::b#1 ) [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
+  [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] )
+  [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
+  [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] )
   to:init_screen::@2
 init_screen::@2: scope:[init_screen]  from init_screen::@1 init_screen::@2
-  [68] (byte*) init_screen::c#2 ← phi( init_screen::@2/(byte*) init_screen::c#1 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
-  [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
-  [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
-  [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
+  [66] (byte*) init_screen::c#2 ← phi( init_screen::@2/(byte*) init_screen::c#1 init_screen::@1/(const byte*) SCREEN#0 ) [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
+  [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] )
+  [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
+  [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] )
   to:init_screen::@return
 init_screen::@return: scope:[init_screen]  from init_screen::@2
-  [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  [70] return  [ ] ( main:0::init_screen:5 [ ] )
   to:@return
 
 DOMINATORS
@@ -5845,8 +5795,6 @@ VARIABLE REGISTER WEIGHTS
 (byte*) init_screen::c#1 16.5
 (byte*) init_screen::c#2 16.5
 (void()) main()
-(byte~) main::$6 22.0
-(byte~) main::$8 22.0
 (void()) plot((byte) plot::x , (byte) plot::y)
 (byte~) plot::$0 4.0
 (byte~) plot::$1 4.0
@@ -5889,8 +5837,6 @@ Initial phi equivalence classes
 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ]
 [ init_screen::b#2 init_screen::b#1 ]
 [ init_screen::c#2 init_screen::c#1 ]
-Added variable main::$6 to zero page equivalence class [ main::$6 ]
-Added variable main::$8 to zero page equivalence class [ main::$8 ]
 Added variable plots::$0 to zero page equivalence class [ plots::$0 ]
 Added variable plots::$1 to zero page equivalence class [ plots::$1 ]
 Added variable plot::x#0 to zero page equivalence class [ plot::x#0 ]
@@ -5920,8 +5866,6 @@ Complete equivalence classes
 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ]
 [ init_screen::b#2 init_screen::b#1 ]
 [ init_screen::c#2 init_screen::c#1 ]
-[ main::$6 ]
-[ main::$8 ]
 [ plots::$0 ]
 [ plots::$1 ]
 [ plot::x#0 ]
@@ -5950,29 +5894,27 @@ Allocated zp ZP_BYTE:5 [ init_plot_tables::y#2 init_plot_tables::y#1 ]
 Allocated zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ]
 Allocated zp ZP_PTR_BYTE:8 [ init_screen::b#2 init_screen::b#1 ]
 Allocated zp ZP_PTR_BYTE:10 [ init_screen::c#2 init_screen::c#1 ]
-Allocated zp ZP_BYTE:12 [ main::$6 ]
-Allocated zp ZP_BYTE:13 [ main::$8 ]
-Allocated zp ZP_BYTE:14 [ plots::$0 ]
-Allocated zp ZP_BYTE:15 [ plots::$1 ]
-Allocated zp ZP_BYTE:16 [ plot::x#0 ]
-Allocated zp ZP_BYTE:17 [ plot::y#0 ]
-Allocated zp ZP_BYTE:18 [ plot::$0 ]
-Allocated zp ZP_PTR_BYTE:19 [ plot::plotter_x#1 ]
-Allocated zp ZP_BYTE:21 [ plot::$1 ]
-Allocated zp ZP_PTR_BYTE:22 [ plot::plotter_x#2 ]
-Allocated zp ZP_BYTE:24 [ plot::$2 ]
-Allocated zp ZP_PTR_BYTE:25 [ plot::plotter_y#1 ]
-Allocated zp ZP_BYTE:27 [ plot::$3 ]
-Allocated zp ZP_PTR_BYTE:28 [ plot::plotter_y#2 ]
-Allocated zp ZP_PTR_BYTE:30 [ plot::plotter#0 ]
-Allocated zp ZP_BYTE:32 [ plot::$5 ]
-Allocated zp ZP_BYTE:33 [ plot::$6 ]
-Allocated zp ZP_BYTE:34 [ init_plot_tables::$0 ]
-Allocated zp ZP_BYTE:35 [ init_plot_tables::$6 ]
-Allocated zp ZP_BYTE:36 [ init_plot_tables::$7 ]
-Allocated zp ZP_BYTE:37 [ init_plot_tables::$8 ]
-Allocated zp ZP_BYTE:38 [ init_plot_tables::$9 ]
-Allocated zp ZP_BYTE:39 [ init_plot_tables::$10 ]
+Allocated zp ZP_BYTE:12 [ plots::$0 ]
+Allocated zp ZP_BYTE:13 [ plots::$1 ]
+Allocated zp ZP_BYTE:14 [ plot::x#0 ]
+Allocated zp ZP_BYTE:15 [ plot::y#0 ]
+Allocated zp ZP_BYTE:16 [ plot::$0 ]
+Allocated zp ZP_PTR_BYTE:17 [ plot::plotter_x#1 ]
+Allocated zp ZP_BYTE:19 [ plot::$1 ]
+Allocated zp ZP_PTR_BYTE:20 [ plot::plotter_x#2 ]
+Allocated zp ZP_BYTE:22 [ plot::$2 ]
+Allocated zp ZP_PTR_BYTE:23 [ plot::plotter_y#1 ]
+Allocated zp ZP_BYTE:25 [ plot::$3 ]
+Allocated zp ZP_PTR_BYTE:26 [ plot::plotter_y#2 ]
+Allocated zp ZP_PTR_BYTE:28 [ plot::plotter#0 ]
+Allocated zp ZP_BYTE:30 [ plot::$5 ]
+Allocated zp ZP_BYTE:31 [ plot::$6 ]
+Allocated zp ZP_BYTE:32 [ init_plot_tables::$0 ]
+Allocated zp ZP_BYTE:33 [ init_plot_tables::$6 ]
+Allocated zp ZP_BYTE:34 [ init_plot_tables::$7 ]
+Allocated zp ZP_BYTE:35 [ init_plot_tables::$8 ]
+Allocated zp ZP_BYTE:36 [ init_plot_tables::$9 ]
+Allocated zp ZP_BYTE:37 [ init_plot_tables::$10 ]
 INITIAL ASM
 //SEG0 Basic Upstart
 .pc = $801 "Basic"
@@ -6015,8 +5957,6 @@ b5:
 bend:
 //SEG6 main
 main: {
-    .label _6 = $c
-    .label _8 = $d
   //SEG7 [1] *((const byte*) BGCOL#0) ← (byte) 0 [ ] ( main:0 [ ] ) -- _star_cowo1=coby2 
     lda #0
     sta BGCOL
@@ -6030,14 +5970,14 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
   init_screen_from_main:
     jsr init_screen
     jmp b5
   //SEG13 main::@5
   b5:
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
   init_plot_tables_from_b5:
     jsr init_plot_tables
     jmp b2
@@ -6050,137 +5990,125 @@ main: {
     jmp b3
   //SEG18 main::@3
   b3:
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- zpby1=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-    sta _6
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=zpby1 
-    lda _6
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
   plots_from_b3:
     jsr plots
     jmp b7
-  //SEG23 main::@7
+  //SEG22 main::@7
   b7:
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- zpby1=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-    sta _8
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=zpby1 
-    lda _8
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
     jmp breturn
-  //SEG27 main::@return
+  //SEG25 main::@return
   breturn:
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
-    .label _0 = $e
-    .label _1 = $f
+    .label _0 = $c
+    .label _1 = $d
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
   b1_from_plots:
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
     jmp b1
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
   b1_from_b3:
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
     jmp b1
-  //SEG34 plots::@1
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx i
     lda plots_x,x
     sta _0
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx i
     lda plots_y,x
     sta _1
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] ) -- zpby1=zpby2 
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] ) -- zpby1=zpby2 
     lda _0
     sta plot.x
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- zpby1=zpby2 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- zpby1=zpby2 
     lda _1
     sta plot.y
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
     jmp b3
-  //SEG40 plots::@3
+  //SEG38 plots::@3
   b3:
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1_from_b3
     jmp breturn
-  //SEG43 plots::@return
+  //SEG41 plots::@return
   breturn:
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
-    .label _0 = $12
-    .label _1 = $15
-    .label _2 = $18
-    .label _3 = $1b
-    .label _5 = $20
-    .label _6 = $21
-    .label x = $10
-    .label y = $11
-    .label plotter_x = $13
-    .label plotter_x_2 = $16
-    .label plotter_y = $19
-    .label plotter_y_2 = $1c
-    .label plotter = $1e
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- zpby1=cowo1_staridx_zpby2 
+    .label _0 = $10
+    .label _1 = $13
+    .label _2 = $16
+    .label _3 = $19
+    .label _5 = $1e
+    .label _6 = $1f
+    .label x = $e
+    .label y = $f
+    .label plotter_x = $11
+    .label plotter_x_2 = $14
+    .label plotter_y = $17
+    .label plotter_y_2 = $1a
+    .label plotter = $1c
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx x
     lda plot_xhi,x
     sta _0
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_zpby1 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_zpby1 
     lda #<0
     sta plotter_x
     lda _0
     sta plotter_x+1
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx x
     lda plot_xlo,x
     sta _1
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby2_setlo_zpby1 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby2_setlo_zpby1 
     lda _1
     sta plotter_x_2
     lda plotter_x+1
     sta plotter_x_2+1
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx y
     lda plot_yhi,x
     sta _2
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_zpby1 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_zpby1 
     lda #<0
     sta plotter_y
     lda _2
     sta plotter_y+1
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx y
     lda plot_ylo,x
     sta _3
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby2_setlo_zpby1 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby2_setlo_zpby1 
     lda _3
     sta plotter_y_2
     lda plotter_y+1
     sta plotter_y_2+1
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby2_plus_zpptrby3 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby2_plus_zpptrby3 
     lda plotter_x_2
     clc
     adc plotter_y_2
@@ -6188,140 +6116,140 @@ plot: {
     lda plotter_x_2+1
     adc plotter_y_2+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx x
     lda plot_bit,x
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- zpby1=_star_zpptrby1_bor_zpby2 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- zpby1=_star_zpptrby1_bor_zpby2 
     ldy #0
     lda (plotter),y
     ora _5
     sta _6
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=zpby1 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=zpby1 
     ldy #0
     lda _6
     sta (plotter),y
     jmp breturn
-  //SEG58 plot::@return
+  //SEG56 plot::@return
   breturn:
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
-    .label _0 = $22
-    .label _6 = $23
-    .label _7 = $24
-    .label _8 = $25
-    .label _9 = $26
-    .label _10 = $27
+    .label _0 = $20
+    .label _6 = $21
+    .label _7 = $22
+    .label _8 = $23
+    .label _9 = $24
+    .label _10 = $25
     .label bits = 4
     .label x = 3
     .label y = 5
     .label yoffs = 6
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
   b1_from_init_plot_tables:
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- zpby1=coby1 
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- zpby1=coby1 
     lda #$80
     sta bits
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- zpby1=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- zpby1=coby1 
     lda #0
     sta x
     jmp b1
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
   b1_from_b2:
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
     jmp b1
-  //SEG67 init_plot_tables::@1
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- zpby1=zpby2_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- zpby1=zpby2_band_coby1 
     lda x
     and #$f8
     sta _0
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_zpby1=zpby2 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_zpby1=zpby2 
     lda _0
     ldx x
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_zpby1=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_zpby1=coby2 
     lda #>BITMAP
     ldx x
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_zpby1=zpby2 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_zpby1=zpby2 
     lda bits
     ldx x
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- zpby1=zpby1_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- zpby1=zpby1_ror_1 
     lsr
     sta bits
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- zpby1_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- zpby1_neq_0_then_la1 
     lda bits
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
   b2_from_b1:
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- zpby1=coby1 
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- zpby1=coby1 
     lda #$80
     sta bits
     jmp b2
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- zpby1=_inc_zpby1 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- zpby1=_inc_zpby1 
     inc x
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- zpby1_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- zpby1_neq_0_then_la1 
     lda x
     bne b1_from_b2
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
   b3_from_b2:
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     lda #0
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- zpby1=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- zpby1=coby1 
     lda #0
     sta y
     jmp b3
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
   b3_from_b4:
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
     jmp b3
-  //SEG85 init_plot_tables::@3
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=zpby2_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=zpby2_band_coby1 
     lda y
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- zpby1=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- zpby1=_lo_zpptrby1 
     lda yoffs
     sta _7
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- zpby1=zpby2_bor_zpby3 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- zpby1=zpby2_bor_zpby3 
     lda _6
     ora _7
     sta _8
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_zpby1=zpby2 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_zpby1=zpby2 
     lda _8
     ldx y
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- zpby1=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- zpby1=_hi_zpptrby1 
     lda yoffs+1
     sta _9
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_zpby1=zpby2 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_zpby1=zpby2 
     lda _9
     ldx y
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- zpby1=zpby2_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- zpby1=zpby2_band_coby1 
     lda y
     and #7
     sta _10
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- zpby1_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- zpby1_neq_coby1_then_la1 
     lda _10
     cmp #7
     bne b4_from_b3
     jmp b7
-  //SEG94 init_plot_tables::@7
+  //SEG92 init_plot_tables::@7
   b7:
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -6329,88 +6257,88 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
   b4_from_b3:
   b4_from_b7:
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
     jmp b4
-  //SEG98 init_plot_tables::@4
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- zpby1=_inc_zpby1 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- zpby1=_inc_zpby1 
     inc y
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- zpby1_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- zpby1_neq_0_then_la1 
     lda y
     bne b3_from_b4
     jmp breturn
-  //SEG101 init_plot_tables::@return
+  //SEG99 init_plot_tables::@return
   breturn:
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
   b2_from_b10:
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 8
     .label c = $a
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
   b1_from_init_screen:
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
     jmp b1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
   b1_from_b1:
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
     jmp b1
-  //SEG111 init_screen::@1
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1_from_b1
     lda b
     cmp #<BITMAP+$2000
     bne b1_from_b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
   b2_from_b1:
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
     jmp b2
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
   b2_from_b2:
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
     jmp b2
-  //SEG119 init_screen::@2
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2_from_b2
@@ -6418,40 +6346,38 @@ init_screen: {
     cmp #<SCREEN+$400
     bne b2_from_b2
     jmp breturn
-  //SEG123 init_screen::@return
+  //SEG121 init_screen::@return
   breturn:
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
 REGISTER UPLIFT POTENTIAL REGISTERS
-Equivalence Class zp ZP_BYTE:32 [ plot::$5 ] has ALU potential.
-Equivalence Class zp ZP_BYTE:36 [ init_plot_tables::$7 ] has ALU potential.
+Equivalence Class zp ZP_BYTE:30 [ plot::$5 ] has ALU potential.
+Equivalence Class zp ZP_BYTE:34 [ init_plot_tables::$7 ] has ALU potential.
 Statement [1] *((const byte*) BGCOL#0) ← (byte) 0 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [2] *((const byte*) FGCOL#0) ← (byte) 0 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [3] *((const byte*) D011#0) ← (const byte) BMM#0|(const byte) DEN#0|(const byte) RSEL#0|(byte) 3 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [4] *((const byte*) D018#0) ← (byte) 24 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [7] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2 [ ] ( main:0 [ ] ) always clobbers reg byte a 
-Statement [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) always clobbers reg byte a 
-Statement [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) always clobbers reg byte a 
-Statement [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) always clobbers reg byte a 
+Statement [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) always clobbers reg byte a 
 Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ]
-Removing always clobbered register reg byte a as potential for zp ZP_BYTE:16 [ plot::x#0 ]
-Removing always clobbered register reg byte a as potential for zp ZP_BYTE:17 [ plot::y#0 ]
-Statement [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) always clobbers reg byte a 
-Statement [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) always clobbers reg byte a 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte a [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte a [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte a [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte x [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte x [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte x [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte y [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte y [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte y [ plot::$6 ] 
+Removing always clobbered register reg byte a as potential for zp ZP_BYTE:14 [ plot::x#0 ]
+Removing always clobbered register reg byte a as potential for zp ZP_BYTE:15 [ plot::y#0 ]
+Statement [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) always clobbers reg byte a 
+Statement [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) always clobbers reg byte a 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte a [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte a [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte a [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte x [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte x [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte x [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte y [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte y [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte y [ plot::$6 ] 
 MISSING FRAGMENTS
   zpby1=_star_zpptrby1_bor_aby
   zpby1=_star_zpptrby1_bor_xby
@@ -6465,45 +6391,43 @@ MISSING FRAGMENTS
   yby=_star_zpptrby1_bor_aby
   yby=_star_zpptrby1_bor_xby
   yby=_star_zpptrby1_bor_yby
-Statement [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) always clobbers reg byte a reg byte y 
+Statement [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) always clobbers reg byte a reg byte y 
 Removing always clobbered register reg byte y as potential for zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ]
-Statement [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) always clobbers reg byte y 
-Statement [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) always clobbers reg byte a 
+Statement [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) always clobbers reg byte y 
+Statement [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) always clobbers reg byte a 
 Removing always clobbered register reg byte a as potential for zp ZP_BYTE:3 [ init_plot_tables::x#2 init_plot_tables::x#1 ]
 Removing always clobbered register reg byte a as potential for zp ZP_BYTE:4 [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ]
-Statement [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
-Statement [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
-Statement [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) always clobbers reg byte a 
+Statement [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
+Statement [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
+Statement [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) always clobbers reg byte a 
 Removing always clobbered register reg byte a as potential for zp ZP_BYTE:5 [ init_plot_tables::y#2 init_plot_tables::y#1 ]
-Statement [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) always clobbers reg byte a 
-Statement [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) always clobbers reg byte a 
-Statement [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) always clobbers reg byte a 
-Statement [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) always clobbers reg byte a reg byte y 
-Statement [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) always clobbers reg byte a 
-Statement [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) always clobbers reg byte a reg byte y 
-Statement [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) always clobbers reg byte a 
+Statement [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) always clobbers reg byte a 
+Statement [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) always clobbers reg byte a 
+Statement [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) always clobbers reg byte a 
+Statement [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) always clobbers reg byte a reg byte y 
+Statement [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) always clobbers reg byte a 
+Statement [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) always clobbers reg byte a reg byte y 
+Statement [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) always clobbers reg byte a 
 Statement [1] *((const byte*) BGCOL#0) ← (byte) 0 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [2] *((const byte*) FGCOL#0) ← (byte) 0 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [3] *((const byte*) D011#0) ← (const byte) BMM#0|(const byte) DEN#0|(const byte) RSEL#0|(byte) 3 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [4] *((const byte*) D018#0) ← (byte) 24 [ ] ( main:0 [ ] ) always clobbers reg byte a 
 Statement [7] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@2 [ ] ( main:0 [ ] ) always clobbers reg byte a 
-Statement [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) always clobbers reg byte a 
-Statement [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) always clobbers reg byte a 
-Statement [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) always clobbers reg byte a 
-Statement [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) always clobbers reg byte a 
-Statement [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) always clobbers reg byte a 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte a [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte a [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte a [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte x [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte x [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte x [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte y [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte y [ plot::$6 ] 
-Potential register analysis [35] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte y [ plot::$6 ] 
+Statement [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) always clobbers reg byte a 
+Statement [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) always clobbers reg byte a 
+Statement [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) always clobbers reg byte a 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment zpby1=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte a [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte a [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment aby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte a [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte x [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte x [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment xby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte x [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_aby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte a [ plot::$5 ] reg byte y [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_xby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte x [ plot::$5 ] reg byte y [ plot::$6 ] 
+Potential register analysis [33] plot::$6 ← *(plot::plotter#0) | plot::$5 missing fragment yby=_star_zpptrby1_bor_yby allocation: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] reg byte y [ plot::$5 ] reg byte y [ plot::$6 ] 
 MISSING FRAGMENTS
   zpby1=_star_zpptrby1_bor_aby
   zpby1=_star_zpptrby1_bor_xby
@@ -6517,19 +6441,19 @@ MISSING FRAGMENTS
   yby=_star_zpptrby1_bor_aby
   yby=_star_zpptrby1_bor_xby
   yby=_star_zpptrby1_bor_yby
-Statement [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) always clobbers reg byte a reg byte y 
-Statement [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) always clobbers reg byte y 
-Statement [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) always clobbers reg byte a 
-Statement [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
-Statement [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
-Statement [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) always clobbers reg byte a 
-Statement [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) always clobbers reg byte a 
-Statement [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) always clobbers reg byte a 
-Statement [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) always clobbers reg byte a 
-Statement [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) always clobbers reg byte a reg byte y 
-Statement [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) always clobbers reg byte a 
-Statement [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) always clobbers reg byte a reg byte y 
-Statement [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) always clobbers reg byte a 
+Statement [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) always clobbers reg byte a reg byte y 
+Statement [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) always clobbers reg byte y 
+Statement [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) always clobbers reg byte a 
+Statement [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
+Statement [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) always clobbers reg byte a 
+Statement [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) always clobbers reg byte a 
+Statement [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) always clobbers reg byte a 
+Statement [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) always clobbers reg byte a 
+Statement [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) always clobbers reg byte a 
+Statement [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) always clobbers reg byte a reg byte y 
+Statement [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) always clobbers reg byte a 
+Statement [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) always clobbers reg byte a reg byte y 
+Statement [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) always clobbers reg byte a 
 Potential registers zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] : zp ZP_BYTE:2 , reg byte x , 
 Potential registers zp ZP_BYTE:3 [ init_plot_tables::x#2 init_plot_tables::x#1 ] : zp ZP_BYTE:3 , reg byte x , reg byte y , 
 Potential registers zp ZP_BYTE:4 [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ] : zp ZP_BYTE:4 , reg byte x , reg byte y , 
@@ -6537,78 +6461,76 @@ Potential registers zp ZP_BYTE:5 [ init_plot_tables::y#2 init_plot_tables::y#1 ]
 Potential registers zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] : zp ZP_PTR_BYTE:6 , 
 Potential registers zp ZP_PTR_BYTE:8 [ init_screen::b#2 init_screen::b#1 ] : zp ZP_PTR_BYTE:8 , 
 Potential registers zp ZP_PTR_BYTE:10 [ init_screen::c#2 init_screen::c#1 ] : zp ZP_PTR_BYTE:10 , 
-Potential registers zp ZP_BYTE:12 [ main::$6 ] : zp ZP_BYTE:12 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:13 [ main::$8 ] : zp ZP_BYTE:13 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:14 [ plots::$0 ] : zp ZP_BYTE:14 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:15 [ plots::$1 ] : zp ZP_BYTE:15 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:16 [ plot::x#0 ] : zp ZP_BYTE:16 , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:17 [ plot::y#0 ] : zp ZP_BYTE:17 , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:18 [ plot::$0 ] : zp ZP_BYTE:18 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_PTR_BYTE:19 [ plot::plotter_x#1 ] : zp ZP_PTR_BYTE:19 , 
-Potential registers zp ZP_BYTE:21 [ plot::$1 ] : zp ZP_BYTE:21 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_PTR_BYTE:22 [ plot::plotter_x#2 ] : zp ZP_PTR_BYTE:22 , 
-Potential registers zp ZP_BYTE:24 [ plot::$2 ] : zp ZP_BYTE:24 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_PTR_BYTE:25 [ plot::plotter_y#1 ] : zp ZP_PTR_BYTE:25 , 
-Potential registers zp ZP_BYTE:27 [ plot::$3 ] : zp ZP_BYTE:27 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_PTR_BYTE:28 [ plot::plotter_y#2 ] : zp ZP_PTR_BYTE:28 , 
-Potential registers zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] : zp ZP_PTR_BYTE:30 , 
-Potential registers zp ZP_BYTE:32 [ plot::$5 ] : zp ZP_BYTE:32 , reg byte a , reg byte x , reg byte y , reg byte alu , 
-Potential registers zp ZP_BYTE:33 [ plot::$6 ] : zp ZP_BYTE:33 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:34 [ init_plot_tables::$0 ] : zp ZP_BYTE:34 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:35 [ init_plot_tables::$6 ] : zp ZP_BYTE:35 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:36 [ init_plot_tables::$7 ] : zp ZP_BYTE:36 , reg byte a , reg byte x , reg byte y , reg byte alu , 
-Potential registers zp ZP_BYTE:37 [ init_plot_tables::$8 ] : zp ZP_BYTE:37 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:38 [ init_plot_tables::$9 ] : zp ZP_BYTE:38 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:39 [ init_plot_tables::$10 ] : zp ZP_BYTE:39 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:12 [ plots::$0 ] : zp ZP_BYTE:12 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:13 [ plots::$1 ] : zp ZP_BYTE:13 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:14 [ plot::x#0 ] : zp ZP_BYTE:14 , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:15 [ plot::y#0 ] : zp ZP_BYTE:15 , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:16 [ plot::$0 ] : zp ZP_BYTE:16 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_PTR_BYTE:17 [ plot::plotter_x#1 ] : zp ZP_PTR_BYTE:17 , 
+Potential registers zp ZP_BYTE:19 [ plot::$1 ] : zp ZP_BYTE:19 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_PTR_BYTE:20 [ plot::plotter_x#2 ] : zp ZP_PTR_BYTE:20 , 
+Potential registers zp ZP_BYTE:22 [ plot::$2 ] : zp ZP_BYTE:22 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_PTR_BYTE:23 [ plot::plotter_y#1 ] : zp ZP_PTR_BYTE:23 , 
+Potential registers zp ZP_BYTE:25 [ plot::$3 ] : zp ZP_BYTE:25 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_PTR_BYTE:26 [ plot::plotter_y#2 ] : zp ZP_PTR_BYTE:26 , 
+Potential registers zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] : zp ZP_PTR_BYTE:28 , 
+Potential registers zp ZP_BYTE:30 [ plot::$5 ] : zp ZP_BYTE:30 , reg byte a , reg byte x , reg byte y , reg byte alu , 
+Potential registers zp ZP_BYTE:31 [ plot::$6 ] : zp ZP_BYTE:31 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:32 [ init_plot_tables::$0 ] : zp ZP_BYTE:32 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:33 [ init_plot_tables::$6 ] : zp ZP_BYTE:33 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:34 [ init_plot_tables::$7 ] : zp ZP_BYTE:34 , reg byte a , reg byte x , reg byte y , reg byte alu , 
+Potential registers zp ZP_BYTE:35 [ init_plot_tables::$8 ] : zp ZP_BYTE:35 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:36 [ init_plot_tables::$9 ] : zp ZP_BYTE:36 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:37 [ init_plot_tables::$10 ] : zp ZP_BYTE:37 , reg byte a , reg byte x , reg byte y , 
 
 REGISTER UPLIFT SCOPES
-Uplift Scope [plots] 218.83: zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] 101: zp ZP_BYTE:14 [ plots::$0 ] 101: zp ZP_BYTE:15 [ plots::$1 ] 
-Uplift Scope [init_plot_tables] 46.93: zp ZP_BYTE:4 [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ] 39.11: zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] 24.75: zp ZP_BYTE:3 [ init_plot_tables::x#2 init_plot_tables::x#1 ] 22.5: zp ZP_BYTE:5 [ init_plot_tables::y#2 init_plot_tables::y#1 ] 22: zp ZP_BYTE:34 [ init_plot_tables::$0 ] 22: zp ZP_BYTE:36 [ init_plot_tables::$7 ] 22: zp ZP_BYTE:37 [ init_plot_tables::$8 ] 22: zp ZP_BYTE:38 [ init_plot_tables::$9 ] 22: zp ZP_BYTE:39 [ init_plot_tables::$10 ] 11: zp ZP_BYTE:35 [ init_plot_tables::$6 ] 
+Uplift Scope [plots] 218.83: zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] 101: zp ZP_BYTE:12 [ plots::$0 ] 101: zp ZP_BYTE:13 [ plots::$1 ] 
+Uplift Scope [init_plot_tables] 46.93: zp ZP_BYTE:4 [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ] 39.11: zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] 24.75: zp ZP_BYTE:3 [ init_plot_tables::x#2 init_plot_tables::x#1 ] 22.5: zp ZP_BYTE:5 [ init_plot_tables::y#2 init_plot_tables::y#1 ] 22: zp ZP_BYTE:32 [ init_plot_tables::$0 ] 22: zp ZP_BYTE:34 [ init_plot_tables::$7 ] 22: zp ZP_BYTE:35 [ init_plot_tables::$8 ] 22: zp ZP_BYTE:36 [ init_plot_tables::$9 ] 22: zp ZP_BYTE:37 [ init_plot_tables::$10 ] 11: zp ZP_BYTE:33 [ init_plot_tables::$6 ] 
 Uplift Scope [init_screen] 33: zp ZP_PTR_BYTE:8 [ init_screen::b#2 init_screen::b#1 ] 33: zp ZP_PTR_BYTE:10 [ init_screen::c#2 init_screen::c#1 ] 
-Uplift Scope [plot] 15: zp ZP_BYTE:17 [ plot::y#0 ] 9.73: zp ZP_BYTE:16 [ plot::x#0 ] 4: zp ZP_BYTE:18 [ plot::$0 ] 4: zp ZP_BYTE:21 [ plot::$1 ] 4: zp ZP_BYTE:24 [ plot::$2 ] 4: zp ZP_BYTE:27 [ plot::$3 ] 4: zp ZP_PTR_BYTE:28 [ plot::plotter_y#2 ] 4: zp ZP_BYTE:32 [ plot::$5 ] 4: zp ZP_BYTE:33 [ plot::$6 ] 2: zp ZP_PTR_BYTE:19 [ plot::plotter_x#1 ] 2: zp ZP_PTR_BYTE:25 [ plot::plotter_y#1 ] 1.33: zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] 0.8: zp ZP_PTR_BYTE:22 [ plot::plotter_x#2 ] 
-Uplift Scope [main] 22: zp ZP_BYTE:12 [ main::$6 ] 22: zp ZP_BYTE:13 [ main::$8 ] 
+Uplift Scope [plot] 15: zp ZP_BYTE:15 [ plot::y#0 ] 9.73: zp ZP_BYTE:14 [ plot::x#0 ] 4: zp ZP_BYTE:16 [ plot::$0 ] 4: zp ZP_BYTE:19 [ plot::$1 ] 4: zp ZP_BYTE:22 [ plot::$2 ] 4: zp ZP_BYTE:25 [ plot::$3 ] 4: zp ZP_PTR_BYTE:26 [ plot::plotter_y#2 ] 4: zp ZP_BYTE:30 [ plot::$5 ] 4: zp ZP_BYTE:31 [ plot::$6 ] 2: zp ZP_PTR_BYTE:17 [ plot::plotter_x#1 ] 2: zp ZP_PTR_BYTE:23 [ plot::plotter_y#1 ] 1.33: zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] 0.8: zp ZP_PTR_BYTE:20 [ plot::plotter_x#2 ] 
+Uplift Scope [main] 
 Uplift Scope [] 
 
-Uplifting [plots] best 10913 combination zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] reg byte y [ plots::$0 ] reg byte a [ plots::$1 ] 
+Uplifting [plots] best 10673 combination zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] reg byte y [ plots::$0 ] reg byte a [ plots::$1 ] 
 Uplift attempts [init_plot_tables] 10000/138240 (limiting to 10000)
-Uplifting [init_plot_tables] best 10283 combination reg byte y [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ] zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] reg byte x [ init_plot_tables::x#2 init_plot_tables::x#1 ] reg byte x [ init_plot_tables::y#2 init_plot_tables::y#1 ] reg byte a [ init_plot_tables::$0 ] reg byte a [ init_plot_tables::$7 ] reg byte a [ init_plot_tables::$8 ] reg byte a [ init_plot_tables::$9 ] zp ZP_BYTE:39 [ init_plot_tables::$10 ] zp ZP_BYTE:35 [ init_plot_tables::$6 ] 
+Uplifting [init_plot_tables] best 10043 combination reg byte y [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ] zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] reg byte x [ init_plot_tables::x#2 init_plot_tables::x#1 ] reg byte x [ init_plot_tables::y#2 init_plot_tables::y#1 ] reg byte a [ init_plot_tables::$0 ] reg byte a [ init_plot_tables::$7 ] reg byte a [ init_plot_tables::$8 ] reg byte a [ init_plot_tables::$9 ] zp ZP_BYTE:37 [ init_plot_tables::$10 ] zp ZP_BYTE:33 [ init_plot_tables::$6 ] 
 Limited combination testing to 10000 combinations of 138240 possible.
-Uplifting [init_screen] best 10283 combination zp ZP_PTR_BYTE:8 [ init_screen::b#2 init_screen::b#1 ] zp ZP_PTR_BYTE:10 [ init_screen::c#2 init_screen::c#1 ] 
+Uplifting [init_screen] best 10043 combination zp ZP_PTR_BYTE:8 [ init_screen::b#2 init_screen::b#1 ] zp ZP_PTR_BYTE:10 [ init_screen::c#2 init_screen::c#1 ] 
 Uplift attempts [plot] 10000/46080 (limiting to 10000)
-Uplifting [plot] best 9844 combination reg byte x [ plot::y#0 ] reg byte y [ plot::x#0 ] reg byte a [ plot::$0 ] reg byte a [ plot::$1 ] reg byte a [ plot::$2 ] reg byte a [ plot::$3 ] zp ZP_PTR_BYTE:28 [ plot::plotter_y#2 ] zp ZP_BYTE:32 [ plot::$5 ] zp ZP_BYTE:33 [ plot::$6 ] zp ZP_PTR_BYTE:19 [ plot::plotter_x#1 ] zp ZP_PTR_BYTE:25 [ plot::plotter_y#1 ] zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] zp ZP_PTR_BYTE:22 [ plot::plotter_x#2 ] 
+Uplifting [plot] best 9604 combination reg byte x [ plot::y#0 ] reg byte y [ plot::x#0 ] reg byte a [ plot::$0 ] reg byte a [ plot::$1 ] reg byte a [ plot::$2 ] reg byte a [ plot::$3 ] zp ZP_PTR_BYTE:26 [ plot::plotter_y#2 ] zp ZP_BYTE:30 [ plot::$5 ] zp ZP_BYTE:31 [ plot::$6 ] zp ZP_PTR_BYTE:17 [ plot::plotter_x#1 ] zp ZP_PTR_BYTE:23 [ plot::plotter_y#1 ] zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] zp ZP_PTR_BYTE:20 [ plot::plotter_x#2 ] 
 Limited combination testing to 10000 combinations of 46080 possible.
-Uplifting [main] best 9724 combination reg byte a [ main::$6 ] reg byte a [ main::$8 ] 
-Uplifting [] best 9724 combination 
+Uplifting [main] best 9604 combination 
+Uplifting [] best 9604 combination 
 MISSING FRAGMENTS
   zpby1=_star_zpptrby1_bor_aby
   zpby1=_star_zpptrby1_bor_xby
   zpby1=_star_zpptrby1_bor_yby
   zpby1=_star_zpptrby1_bor_cowo1_staridx_yby
 Attempting to uplift remaining variables inzp ZP_BYTE:2 [ plots::i#2 plots::i#1 ]
-Uplifting [plots] best 9724 combination zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] 
-Attempting to uplift remaining variables inzp ZP_BYTE:39 [ init_plot_tables::$10 ]
-Uplifting [init_plot_tables] best 9664 combination reg byte a [ init_plot_tables::$10 ] 
-Attempting to uplift remaining variables inzp ZP_BYTE:35 [ init_plot_tables::$6 ]
-Uplifting [init_plot_tables] best 9664 combination zp ZP_BYTE:35 [ init_plot_tables::$6 ] 
-Attempting to uplift remaining variables inzp ZP_BYTE:32 [ plot::$5 ]
-Uplifting [plot] best 9664 combination zp ZP_BYTE:32 [ plot::$5 ] 
-Attempting to uplift remaining variables inzp ZP_BYTE:33 [ plot::$6 ]
-Uplifting [plot] best 9658 combination reg byte a [ plot::$6 ] 
+Uplifting [plots] best 9604 combination zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] 
+Attempting to uplift remaining variables inzp ZP_BYTE:37 [ init_plot_tables::$10 ]
+Uplifting [init_plot_tables] best 9544 combination reg byte a [ init_plot_tables::$10 ] 
+Attempting to uplift remaining variables inzp ZP_BYTE:33 [ init_plot_tables::$6 ]
+Uplifting [init_plot_tables] best 9544 combination zp ZP_BYTE:33 [ init_plot_tables::$6 ] 
+Attempting to uplift remaining variables inzp ZP_BYTE:30 [ plot::$5 ]
+Uplifting [plot] best 9544 combination zp ZP_BYTE:30 [ plot::$5 ] 
+Attempting to uplift remaining variables inzp ZP_BYTE:31 [ plot::$6 ]
+Uplifting [plot] best 9538 combination reg byte a [ plot::$6 ] 
 MISSING FRAGMENTS
   zpby1=_star_zpptrby1_bor_aby
   zpby1=_star_zpptrby1_bor_xby
   zpby1=_star_zpptrby1_bor_yby
   zpby1=_star_zpptrby1_bor_cowo1_staridx_yby
-Coalescing zero page register [ zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] ] with [ zp ZP_BYTE:35 [ init_plot_tables::$6 ] ]
+Coalescing zero page register [ zp ZP_BYTE:2 [ plots::i#2 plots::i#1 ] ] with [ zp ZP_BYTE:33 [ init_plot_tables::$6 ] ]
 Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] ] with [ zp ZP_PTR_BYTE:8 [ init_screen::b#2 init_screen::b#1 ] ]
 Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 ] ] with [ zp ZP_PTR_BYTE:10 [ init_screen::c#2 init_screen::c#1 ] ]
-Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 ] ] with [ zp ZP_PTR_BYTE:19 [ plot::plotter_x#1 ] ]
-Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 ] ] with [ zp ZP_PTR_BYTE:22 [ plot::plotter_x#2 ] ]
-Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 plot::plotter_x#2 ] ] with [ zp ZP_PTR_BYTE:30 [ plot::plotter#0 ] ]
-Coalescing zero page register [ zp ZP_PTR_BYTE:25 [ plot::plotter_y#1 ] ] with [ zp ZP_PTR_BYTE:28 [ plot::plotter_y#2 ] ]
+Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 ] ] with [ zp ZP_PTR_BYTE:17 [ plot::plotter_x#1 ] ]
+Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 ] ] with [ zp ZP_PTR_BYTE:20 [ plot::plotter_x#2 ] ]
+Coalescing zero page register [ zp ZP_PTR_BYTE:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 plot::plotter_x#2 ] ] with [ zp ZP_PTR_BYTE:28 [ plot::plotter#0 ] ]
+Coalescing zero page register [ zp ZP_PTR_BYTE:23 [ plot::plotter_y#1 ] ] with [ zp ZP_PTR_BYTE:26 [ plot::plotter_y#2 ] ]
 Allocated (was zp ZP_PTR_BYTE:6) zp ZP_PTR_BYTE:3 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 plot::plotter_x#2 plot::plotter#0 ]
-Allocated (was zp ZP_PTR_BYTE:25) zp ZP_PTR_BYTE:5 [ plot::plotter_y#1 plot::plotter_y#2 ]
-Allocated (was zp ZP_BYTE:32) zp ZP_BYTE:7 [ plot::$5 ]
+Allocated (was zp ZP_PTR_BYTE:23) zp ZP_PTR_BYTE:5 [ plot::plotter_y#1 plot::plotter_y#2 ]
+Allocated (was zp ZP_BYTE:30) zp ZP_BYTE:7 [ plot::$5 ]
 Removing instruction jmp b5
 Removing instruction jmp bend
 Removing instruction jmp b5
@@ -6683,13 +6605,13 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
   init_screen_from_main:
     jsr init_screen
   //SEG13 main::@5
   b5:
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
   init_plot_tables_from_b5:
     jsr init_plot_tables
   //SEG16 main::@2
@@ -6700,98 +6622,90 @@ main: {
     bne b2
   //SEG18 main::@3
   b3:
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
   plots_from_b3:
     jsr plots
-  //SEG23 main::@7
+  //SEG22 main::@7
   b7:
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
-  //SEG27 main::@return
+  //SEG25 main::@return
   breturn:
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
   b1_from_plots:
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
     jmp b1
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
   b1_from_b3:
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
-  //SEG34 plots::@1
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
     ldx i
     lda plots_x,x
     tay
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
     ldx i
     lda plots_y,x
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
     // (byte) plot::x#0 = (byte~) plots::$0  // register copy reg byte y
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
     tax
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
-  //SEG40 plots::@3
+  //SEG38 plots::@3
   b3:
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1_from_b3
-  //SEG43 plots::@return
+  //SEG41 plots::@return
   breturn:
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
     .label _5 = 7
     .label plotter_x = 3
     .label plotter_y = 5
     .label plotter = 3
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xhi,y
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_x+1
     lda #<0
     sta plotter_x
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xlo,y
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_x
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
     lda plot_yhi,x
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_y+1
     lda #<0
     sta plotter_y
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
     lda plot_ylo,x
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_y
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
     lda plotter
     clc
     adc plotter_y
@@ -6799,106 +6713,106 @@ plot: {
     lda plotter+1
     adc plotter_y+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
     lda plot_bit,y
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
     ldy #0
     lda (plotter),y
     ora _5
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
     ldy #0
     sta (plotter),y
-  //SEG58 plot::@return
+  //SEG56 plot::@return
   breturn:
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
     .label yoffs = 3
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
   b1_from_init_plot_tables:
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
     ldy #$80
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
     ldx #0
     jmp b1
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
   b1_from_b2:
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
-  //SEG67 init_plot_tables::@1
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
     txa
     and #$f8
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
     lda #>BITMAP
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
     tya
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
     tya
     lsr
     tay
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
     cpy #0
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
   b2_from_b1:
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
     ldy #$80
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b1_from_b2
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
   b3_from_b2:
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     lda #0
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
     ldx #0
     jmp b3
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
   b3_from_b4:
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
-  //SEG85 init_plot_tables::@3
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
     txa
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
     lda yoffs
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
     ora _6
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
     lda yoffs+1
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
     txa
     and #7
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
     cmp #7
     bne b4_from_b3
-  //SEG94 init_plot_tables::@7
+  //SEG92 init_plot_tables::@7
   b7:
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -6906,93 +6820,93 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
   b4_from_b3:
   b4_from_b7:
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
-  //SEG98 init_plot_tables::@4
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b3_from_b4
-  //SEG101 init_plot_tables::@return
+  //SEG99 init_plot_tables::@return
   breturn:
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
   b2_from_b10:
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 3
     .label c = 3
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
   b1_from_init_screen:
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
     jmp b1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
   b1_from_b1:
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
-  //SEG111 init_screen::@1
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1_from_b1
     lda b
     cmp #<BITMAP+$2000
     bne b1_from_b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
   b2_from_b1:
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
     jmp b2
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
   b2_from_b2:
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
-  //SEG119 init_screen::@2
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2_from_b2
     lda c
     cmp #<SCREEN+$400
     bne b2_from_b2
-  //SEG123 init_screen::@return
+  //SEG121 init_screen::@return
   breturn:
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
@@ -7052,13 +6966,13 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
   init_screen_from_main:
     jsr init_screen
   //SEG13 main::@5
   b5:
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
   init_plot_tables_from_b5:
     jsr init_plot_tables
   //SEG16 main::@2
@@ -7069,98 +6983,90 @@ main: {
     bne b2
   //SEG18 main::@3
   b3:
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
   plots_from_b3:
     jsr plots
-  //SEG23 main::@7
+  //SEG22 main::@7
   b7:
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
-  //SEG27 main::@return
+  //SEG25 main::@return
   breturn:
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
   b1_from_plots:
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
     jmp b1
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
   b1_from_b3:
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
-  //SEG34 plots::@1
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
     ldx i
     lda plots_x,x
     tay
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
     ldx i
     lda plots_y,x
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
     // (byte) plot::x#0 = (byte~) plots::$0  // register copy reg byte y
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
     tax
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
-  //SEG40 plots::@3
+  //SEG38 plots::@3
   b3:
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1_from_b3
-  //SEG43 plots::@return
+  //SEG41 plots::@return
   breturn:
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
     .label _5 = 7
     .label plotter_x = 3
     .label plotter_y = 5
     .label plotter = 3
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xhi,y
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_x+1
     lda #<0
     sta plotter_x
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xlo,y
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_x
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
     lda plot_yhi,x
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_y+1
     lda #<0
     sta plotter_y
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
     lda plot_ylo,x
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_y
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
     lda plotter
     clc
     adc plotter_y
@@ -7168,104 +7074,104 @@ plot: {
     lda plotter+1
     adc plotter_y+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
     lda plot_bit,y
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
     ldy #0
     lda (plotter),y
     ora _5
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
     sta (plotter),y
-  //SEG58 plot::@return
+  //SEG56 plot::@return
   breturn:
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
     .label yoffs = 3
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
   b1_from_init_plot_tables:
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
     ldy #$80
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
     ldx #0
     jmp b1
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
   b1_from_b2:
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
-  //SEG67 init_plot_tables::@1
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
     txa
     and #$f8
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
     lda #>BITMAP
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
     tya
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
     tya
     lsr
     tay
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
     cpy #0
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
   b2_from_b1:
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
     ldy #$80
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b1_from_b2
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
   b3_from_b2:
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
     ldx #0
     jmp b3
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
   b3_from_b4:
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
-  //SEG85 init_plot_tables::@3
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
     txa
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
     lda yoffs
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
     ora _6
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
     lda yoffs+1
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
     txa
     and #7
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
     cmp #7
     bne b4_from_b3
-  //SEG94 init_plot_tables::@7
+  //SEG92 init_plot_tables::@7
   b7:
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -7273,93 +7179,93 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
   b4_from_b3:
   b4_from_b7:
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
-  //SEG98 init_plot_tables::@4
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b3_from_b4
-  //SEG101 init_plot_tables::@return
+  //SEG99 init_plot_tables::@return
   breturn:
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
   b2_from_b10:
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 3
     .label c = 3
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
   b1_from_init_screen:
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
     jmp b1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
   b1_from_b1:
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
-  //SEG111 init_screen::@1
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1_from_b1
     lda b
     cmp #<BITMAP+$2000
     bne b1_from_b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
   b2_from_b1:
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
     jmp b2
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
   b2_from_b2:
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
-  //SEG119 init_screen::@2
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2_from_b2
     lda c
     cmp #<SCREEN+$400
     bne b2_from_b2
-  //SEG123 init_screen::@return
+  //SEG121 init_screen::@return
   breturn:
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
@@ -7433,13 +7339,13 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
   init_screen_from_main:
     jsr init_screen
   //SEG13 main::@5
   b5:
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
     jsr init_plot_tables
   //SEG16 main::@2
   b2:
@@ -7449,97 +7355,89 @@ main: {
     bne b2
   //SEG18 main::@3
   b3:
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
   plots_from_b3:
     jsr plots
-  //SEG23 main::@7
+  //SEG22 main::@7
   b7:
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
-  //SEG27 main::@return
+  //SEG25 main::@return
   breturn:
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
   b1_from_plots:
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
     jmp b1
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
-  //SEG34 plots::@1
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
     ldx i
     lda plots_x,x
     tay
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
     ldx i
     lda plots_y,x
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
     // (byte) plot::x#0 = (byte~) plots::$0  // register copy reg byte y
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
     tax
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
-  //SEG40 plots::@3
+  //SEG38 plots::@3
   b3:
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1
-  //SEG43 plots::@return
+  //SEG41 plots::@return
   breturn:
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
     .label _5 = 7
     .label plotter_x = 3
     .label plotter_y = 5
     .label plotter = 3
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xhi,y
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_x+1
     lda #<0
     sta plotter_x
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xlo,y
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_x
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
     lda plot_yhi,x
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_y+1
     lda #<0
     sta plotter_y
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
     lda plot_ylo,x
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_y
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
     lda plotter
     clc
     adc plotter_y
@@ -7547,102 +7445,102 @@ plot: {
     lda plotter+1
     adc plotter_y+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
     lda plot_bit,y
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
     ldy #0
     lda (plotter),y
     ora _5
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
     sta (plotter),y
-  //SEG58 plot::@return
+  //SEG56 plot::@return
   breturn:
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
     .label yoffs = 3
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
   b1_from_init_plot_tables:
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
     ldy #$80
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
     ldx #0
     jmp b1
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
-  //SEG67 init_plot_tables::@1
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
     txa
     and #$f8
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
     lda #>BITMAP
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
     tya
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
     tya
     lsr
     tay
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
     cpy #0
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
   b2_from_b1:
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
     ldy #$80
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b1
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
   b3_from_b2:
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
     ldx #0
     jmp b3
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
-  //SEG85 init_plot_tables::@3
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
     txa
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
     lda yoffs
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
     ora _6
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
     lda yoffs+1
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
     txa
     and #7
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
     cmp #7
     bne b4
-  //SEG94 init_plot_tables::@7
+  //SEG92 init_plot_tables::@7
   b7:
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -7650,88 +7548,88 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
-  //SEG98 init_plot_tables::@4
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b3
-  //SEG101 init_plot_tables::@return
+  //SEG99 init_plot_tables::@return
   breturn:
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 3
     .label c = 3
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
   b1_from_init_screen:
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
     jmp b1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
-  //SEG111 init_screen::@1
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1
     lda b
     cmp #<BITMAP+$2000
     bne b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
   b2_from_b1:
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
     jmp b2
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
-  //SEG119 init_screen::@2
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2
     lda c
     cmp #<SCREEN+$400
     bne b2
-  //SEG123 init_screen::@return
+  //SEG121 init_screen::@return
   breturn:
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
@@ -7805,11 +7703,11 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
     jsr init_screen
   //SEG13 main::@5
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
     jsr init_plot_tables
   //SEG16 main::@2
   b2:
@@ -7818,91 +7716,83 @@ main: {
     cmp #$ff
     bne b2
   //SEG18 main::@3
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
     jsr plots
-  //SEG23 main::@7
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG22 main::@7
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
-  //SEG27 main::@return
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG25 main::@return
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
     jmp b1
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
-  //SEG34 plots::@1
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
     ldx i
     lda plots_x,x
     tay
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
     ldx i
     lda plots_y,x
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
     // (byte) plot::x#0 = (byte~) plots::$0  // register copy reg byte y
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
     tax
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
-  //SEG40 plots::@3
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG38 plots::@3
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1
-  //SEG43 plots::@return
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG41 plots::@return
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
     .label _5 = 7
     .label plotter_x = 3
     .label plotter_y = 5
     .label plotter = 3
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xhi,y
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_x+1
     lda #<0
     sta plotter_x
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xlo,y
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_x
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
     lda plot_yhi,x
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_y+1
     lda #<0
     sta plotter_y
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
     lda plot_ylo,x
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_y
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
     lda plotter
     clc
     adc plotter_y
@@ -7910,97 +7800,97 @@ plot: {
     lda plotter+1
     adc plotter_y+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
     lda plot_bit,y
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
     ldy #0
     lda (plotter),y
     ora _5
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
     sta (plotter),y
-  //SEG58 plot::@return
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG56 plot::@return
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
     .label yoffs = 3
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
     ldy #$80
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
     ldx #0
     jmp b1
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
-  //SEG67 init_plot_tables::@1
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
     txa
     and #$f8
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
     lda #>BITMAP
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
     tya
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
     tya
     lsr
     tay
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
     cpy #0
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
     ldy #$80
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b1
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
     ldx #0
     jmp b3
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
-  //SEG85 init_plot_tables::@3
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
     txa
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
     lda yoffs
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
     ora _6
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
     lda yoffs+1
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
     txa
     and #7
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
     cmp #7
     bne b4
-  //SEG94 init_plot_tables::@7
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG92 init_plot_tables::@7
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -8008,84 +7898,84 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
-  //SEG98 init_plot_tables::@4
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b3
-  //SEG101 init_plot_tables::@return
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG99 init_plot_tables::@return
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 3
     .label c = 3
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
     jmp b1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
-  //SEG111 init_screen::@1
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1
     lda b
     cmp #<BITMAP+$2000
     bne b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
     jmp b2
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
-  //SEG119 init_screen::@2
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2
     lda c
     cmp #<SCREEN+$400
     bne b2
-  //SEG123 init_screen::@return
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG121 init_screen::@return
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
@@ -8144,11 +8034,11 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
     jsr init_screen
   //SEG13 main::@5
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
     jsr init_plot_tables
   //SEG16 main::@2
   b2:
@@ -8157,90 +8047,82 @@ main: {
     cmp #$ff
     bne b2
   //SEG18 main::@3
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
     jsr plots
-  //SEG23 main::@7
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG22 main::@7
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
-  //SEG27 main::@return
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG25 main::@return
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
-  //SEG34 plots::@1
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
     ldx i
     lda plots_x,x
     tay
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
     ldx i
     lda plots_y,x
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
     // (byte) plot::x#0 = (byte~) plots::$0  // register copy reg byte y
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
     tax
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
-  //SEG40 plots::@3
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG38 plots::@3
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1
-  //SEG43 plots::@return
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG41 plots::@return
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
     .label _5 = 7
     .label plotter_x = 3
     .label plotter_y = 5
     .label plotter = 3
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xhi,y
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_x+1
     lda #<0
     sta plotter_x
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xlo,y
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_x
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
     lda plot_yhi,x
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_y+1
     lda #<0
     sta plotter_y
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
     lda plot_ylo,x
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_y
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
     lda plotter
     clc
     adc plotter_y
@@ -8248,95 +8130,95 @@ plot: {
     lda plotter+1
     adc plotter_y+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
     lda plot_bit,y
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
     ldy #0
     lda (plotter),y
     ora _5
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
     sta (plotter),y
-  //SEG58 plot::@return
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG56 plot::@return
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
     .label yoffs = 3
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
     ldy #$80
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
     ldx #0
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
-  //SEG67 init_plot_tables::@1
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
     txa
     and #$f8
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
     lda #>BITMAP
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
     tya
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
     tya
     lsr
     tay
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
     cpy #0
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
     ldy #$80
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b1
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
     ldx #0
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
-  //SEG85 init_plot_tables::@3
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
     txa
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
     lda yoffs
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
     ora _6
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
     lda yoffs+1
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
     txa
     and #7
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
     cmp #7
     bne b4
-  //SEG94 init_plot_tables::@7
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG92 init_plot_tables::@7
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -8344,82 +8226,82 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
-  //SEG98 init_plot_tables::@4
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b3
-  //SEG101 init_plot_tables::@return
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG99 init_plot_tables::@return
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 3
     .label c = 3
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
-  //SEG111 init_screen::@1
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1
     lda b
     cmp #<BITMAP+$2000
     bne b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
-  //SEG119 init_screen::@2
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2
     lda c
     cmp #<SCREEN+$400
     bne b2
-  //SEG123 init_screen::@return
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG121 init_screen::@return
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
@@ -8498,8 +8380,6 @@ FINAL SYMBOL TABLE
 (byte*) init_screen::c#1 c zp ZP_PTR_BYTE:3 16.5
 (byte*) init_screen::c#2 c zp ZP_PTR_BYTE:3 16.5
 (void()) main()
-(byte~) main::$6 reg byte a 22.0
-(byte~) main::$8 reg byte a 22.0
 (label) main::@2
 (label) main::@3
 (label) main::@5
@@ -8556,8 +8436,6 @@ reg byte x [ init_plot_tables::x#2 init_plot_tables::x#1 ]
 reg byte y [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ]
 reg byte x [ init_plot_tables::y#2 init_plot_tables::y#1 ]
 zp ZP_PTR_BYTE:3 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 plot::plotter_x#2 plot::plotter#0 ]
-reg byte a [ main::$6 ]
-reg byte a [ main::$8 ]
 reg byte y [ plots::$0 ]
 reg byte a [ plots::$1 ]
 reg byte y [ plot::x#0 ]
@@ -8624,11 +8502,11 @@ main: {
     lda #$18
     sta D018
   //SEG11 [5] call init_screen param-assignment [ ] ( main:0 [ ] )
-  //SEG12 [63] phi from main to init_screen [phi:main->init_screen]
+  //SEG12 [61] phi from main to init_screen [phi:main->init_screen]
     jsr init_screen
   //SEG13 main::@5
   //SEG14 [6] call init_plot_tables param-assignment [ ] ( main:0 [ ] )
-  //SEG15 [38] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
+  //SEG15 [36] phi from main::@5 to init_plot_tables [phi:main::@5->init_plot_tables]
     jsr init_plot_tables
   //SEG16 main::@2
   b2:
@@ -8637,90 +8515,82 @@ main: {
     cmp #$ff
     bne b2
   //SEG18 main::@3
-  //SEG19 [8] (byte~) main::$6 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::$6 ] ( main:0 [ main::$6 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG20 [9] *((const byte*) BGCOL#0) ← (byte~) main::$6 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG21 [10] call plots param-assignment [ ] ( main:0 [ ] )
-  //SEG22 [15] phi from main::@3 to plots [phi:main::@3->plots]
+  //SEG19 [8] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG20 [9] call plots param-assignment [ ] ( main:0 [ ] )
+  //SEG21 [13] phi from main::@3 to plots [phi:main::@3->plots]
     jsr plots
-  //SEG23 main::@7
-  //SEG24 [11] (byte~) main::$8 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::$8 ] ( main:0 [ main::$8 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG25 [12] *((const byte*) BGCOL#0) ← (byte~) main::$8 [ ] ( main:0 [ ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG26 [13] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
+  //SEG22 main::@7
+  //SEG23 [10] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ ] ( main:0 [ ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG24 [11] if(true) goto main::@2 [ ] ( main:0 [ ] ) -- true_then_la1 
     jmp b2
-  //SEG27 main::@return
-  //SEG28 [14] return  [ ] ( main:0 [ ] )
+  //SEG25 main::@return
+  //SEG26 [12] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG29 plots
+//SEG27 plots
 plots: {
     .label i = 2
-  //SEG30 [16] phi from plots to plots::@1 [phi:plots->plots::@1]
-  //SEG31 [16] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
+  //SEG28 [14] phi from plots to plots::@1 [phi:plots->plots::@1]
+  //SEG29 [14] phi (byte) plots::i#2 = (byte) 0 [phi:plots->plots::@1#0] -- zpby1=coby1 
     lda #0
     sta i
-  //SEG32 [16] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
-  //SEG33 [16] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
-  //SEG34 plots::@1
+  //SEG30 [14] phi from plots::@3 to plots::@1 [phi:plots::@3->plots::@1]
+  //SEG31 [14] phi (byte) plots::i#2 = (byte) plots::i#1 [phi:plots::@3->plots::@1#0] -- register_copy 
+  //SEG32 plots::@1
   b1:
-  //SEG35 [17] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:10 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
+  //SEG33 [15] (byte~) plots::$0 ← (const byte[]) plots_x#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 ] ( main:0::plots:9 [ plots::i#2 plots::$0 ] ) -- yby=cowo1_staridx_zpby1 
     ldx i
     lda plots_x,x
     tay
-  //SEG36 [18] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:10 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
+  //SEG34 [16] (byte~) plots::$1 ← (const byte[]) plots_y#0 *idx (byte) plots::i#2 [ plots::i#2 plots::$0 plots::$1 ] ( main:0::plots:9 [ plots::i#2 plots::$0 plots::$1 ] ) -- aby=cowo1_staridx_zpby1 
     ldx i
     lda plots_y,x
-  //SEG37 [19] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:10 [ plots::i#2 plots::$1 plot::x#0 ] )
+  //SEG35 [17] (byte) plot::x#0 ← (byte~) plots::$0 [ plots::i#2 plots::$1 plot::x#0 ] ( main:0::plots:9 [ plots::i#2 plots::$1 plot::x#0 ] )
     // (byte) plot::x#0 = (byte~) plots::$0  // register copy reg byte y
-  //SEG38 [20] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:10 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
+  //SEG36 [18] (byte) plot::y#0 ← (byte~) plots::$1 [ plots::i#2 plot::x#0 plot::y#0 ] ( main:0::plots:9 [ plots::i#2 plot::x#0 plot::y#0 ] ) -- xby=aby 
     tax
-  //SEG39 [21] call plot param-assignment [ plots::i#2 ] ( main:0::plots:10 [ plots::i#2 ] )
+  //SEG37 [19] call plot param-assignment [ plots::i#2 ] ( main:0::plots:9 [ plots::i#2 ] )
     jsr plot
-  //SEG40 plots::@3
-  //SEG41 [22] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG38 plots::@3
+  //SEG39 [20] (byte) plots::i#1 ← ++ (byte) plots::i#2 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG42 [23] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:10 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
+  //SEG40 [21] if((byte) plots::i#1<(const byte) plots_cnt#0) goto plots::@1 [ plots::i#1 ] ( main:0::plots:9 [ plots::i#1 ] ) -- zpby1_lt_coby1_then_la1 
     lda i
     cmp #plots_cnt
     bcc b1
-  //SEG43 plots::@return
-  //SEG44 [24] return  [ ] ( main:0::plots:10 [ ] )
+  //SEG41 plots::@return
+  //SEG42 [22] return  [ ] ( main:0::plots:9 [ ] )
     rts
 }
-//SEG45 plot
+//SEG43 plot
 plot: {
     .label _5 = 7
     .label plotter_x = 3
     .label plotter_y = 5
     .label plotter = 3
-  //SEG46 [25] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
+  //SEG44 [23] (byte~) plot::$0 ← (const byte[]) plot_xhi#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::$0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::$0 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xhi,y
-  //SEG47 [26] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG45 [24] (byte*) plot::plotter_x#1 ← (byte) 0 hi= (byte~) plot::$0 [ plot::x#0 plot::y#0 plot::plotter_x#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_x+1
     lda #<0
     sta plotter_x
-  //SEG48 [27] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
+  //SEG46 [25] (byte~) plot::$1 ← (const byte[]) plot_xlo#0 *idx (byte) plot::x#0 [ plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#1 plot::$1 ] ) -- aby=cowo1_staridx_yby 
     lda plot_xlo,y
-  //SEG49 [28] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG47 [26] (byte*) plot::plotter_x#2 ← (byte*) plot::plotter_x#1 lo= (byte~) plot::$1 [ plot::x#0 plot::y#0 plot::plotter_x#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_x
-  //SEG50 [29] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
+  //SEG48 [27] (byte~) plot::$2 ← (const byte[]) plot_yhi#0 *idx (byte) plot::y#0 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::$2 ] ) -- aby=cowo1_staridx_xby 
     lda plot_yhi,x
-  //SEG51 [30] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
+  //SEG49 [28] (byte*) plot::plotter_y#1 ← (byte) 0 hi= (byte~) plot::$2 [ plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::y#0 plot::plotter_x#2 plot::plotter_y#1 ] ) -- zpptrby1=coby1_sethi_aby 
     sta plotter_y+1
     lda #<0
     sta plotter_y
-  //SEG52 [31] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
+  //SEG50 [29] (byte~) plot::$3 ← (const byte[]) plot_ylo#0 *idx (byte) plot::y#0 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#1 plot::$3 ] ) -- aby=cowo1_staridx_xby 
     lda plot_ylo,x
-  //SEG53 [32] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
+  //SEG51 [30] (byte*) plot::plotter_y#2 ← (byte*) plot::plotter_y#1 lo= (byte~) plot::$3 [ plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter_x#2 plot::plotter_y#2 ] ) -- zpptrby1=zpptrby1_setlo_aby 
     sta plotter_y
-  //SEG54 [33] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
+  //SEG52 [31] (byte*) plot::plotter#0 ← (byte*) plot::plotter_x#2 + (byte*) plot::plotter_y#2 [ plot::x#0 plot::plotter#0 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::x#0 plot::plotter#0 ] ) -- zpptrby1=zpptrby1_plus_zpptrby2 
     lda plotter
     clc
     adc plotter_y
@@ -8728,95 +8598,95 @@ plot: {
     lda plotter+1
     adc plotter_y+1
     sta plotter+1
-  //SEG55 [34] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
+  //SEG53 [32] (byte~) plot::$5 ← (const byte[]) plot_bit#0 *idx (byte) plot::x#0 [ plot::plotter#0 plot::$5 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$5 ] ) -- zpby1=cowo1_staridx_yby 
     lda plot_bit,y
     sta _5
-  //SEG56 [35] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:10::plot:21 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
+  //SEG54 [33] (byte~) plot::$6 ← *((byte*) plot::plotter#0) | (byte~) plot::$5 [ plot::plotter#0 plot::$6 ] ( main:0::plots:9::plot:19 [ plots::i#2 plot::plotter#0 plot::$6 ] ) -- aby=_star_zpptrby1_bor_zpby1 
     ldy #0
     lda (plotter),y
     ora _5
-  //SEG57 [36] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
+  //SEG55 [34] *((byte*) plot::plotter#0) ← (byte~) plot::$6 [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] ) -- _star_zpptrby1=aby 
     sta (plotter),y
-  //SEG58 plot::@return
-  //SEG59 [37] return  [ ] ( main:0::plots:10::plot:21 [ plots::i#2 ] )
+  //SEG56 plot::@return
+  //SEG57 [35] return  [ ] ( main:0::plots:9::plot:19 [ plots::i#2 ] )
     rts
 }
-//SEG60 init_plot_tables
+//SEG58 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
     .label yoffs = 3
-  //SEG61 [39] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
-  //SEG62 [39] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
+  //SEG59 [37] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
+  //SEG60 [37] phi (byte) init_plot_tables::bits#3 = (byte) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- yby=coby1 
     ldy #$80
-  //SEG63 [39] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
+  //SEG61 [37] phi (byte) init_plot_tables::x#2 = (byte) 0 [phi:init_plot_tables->init_plot_tables::@1#1] -- xby=coby1 
     ldx #0
-  //SEG64 [39] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
-  //SEG65 [39] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
-  //SEG66 [39] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
-  //SEG67 init_plot_tables::@1
+  //SEG62 [37] phi from init_plot_tables::@2 to init_plot_tables::@1 [phi:init_plot_tables::@2->init_plot_tables::@1]
+  //SEG63 [37] phi (byte) init_plot_tables::bits#3 = (byte) init_plot_tables::bits#4 [phi:init_plot_tables::@2->init_plot_tables::@1#0] -- register_copy 
+  //SEG64 [37] phi (byte) init_plot_tables::x#2 = (byte) init_plot_tables::x#1 [phi:init_plot_tables::@2->init_plot_tables::@1#1] -- register_copy 
+  //SEG65 init_plot_tables::@1
   b1:
-  //SEG68 [40] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
+  //SEG66 [38] (byte~) init_plot_tables::$0 ← (byte) init_plot_tables::x#2 & (byte) 248 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 init_plot_tables::$0 ] ) -- aby=xby_band_coby1 
     txa
     and #$f8
-  //SEG69 [41] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
+  //SEG67 [39] *((const byte[]) plot_xlo#0 + (byte) init_plot_tables::x#2) ← (byte~) init_plot_tables::$0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=aby 
     sta plot_xlo,x
-  //SEG70 [42] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
+  //SEG68 [40] *((const byte[]) plot_xhi#0 + (byte) init_plot_tables::x#2) ← >(const byte*) BITMAP#0 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=coby2 
     lda #>BITMAP
     sta plot_xhi,x
-  //SEG71 [43] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
+  //SEG69 [41] *((const byte[]) plot_bit#0 + (byte) init_plot_tables::x#2) ← (byte) init_plot_tables::bits#3 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#3 ] ) -- cowo1_staridx_xby=yby 
     tya
     sta plot_bit,x
-  //SEG72 [44] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
+  //SEG70 [42] (byte) init_plot_tables::bits#1 ← (byte) init_plot_tables::bits#3 >> (byte) 1 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 init_plot_tables::bits#1 ] ) -- yby=yby_ror_1 
     tya
     lsr
     tay
-  //SEG73 [45] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
+  //SEG71 [43] if((byte) init_plot_tables::bits#1!=(byte) 0) goto init_plot_tables::@10 [ init_plot_tables::x#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#2 ] ) -- yby_neq_0_then_la1 
     cpy #0
     bne b10
-  //SEG74 [46] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
-  //SEG75 [46] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
+  //SEG72 [44] phi from init_plot_tables::@1 to init_plot_tables::@2 [phi:init_plot_tables::@1->init_plot_tables::@2]
+  //SEG73 [44] phi (byte) init_plot_tables::bits#4 = (byte) 128 [phi:init_plot_tables::@1->init_plot_tables::@2#0] -- yby=coby1 
     ldy #$80
-  //SEG76 init_plot_tables::@2
+  //SEG74 init_plot_tables::@2
   b2:
-  //SEG77 [47] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
+  //SEG75 [45] (byte) init_plot_tables::x#1 ← ++ (byte) init_plot_tables::x#2 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG78 [48] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
+  //SEG76 [46] if((byte) init_plot_tables::x#1!=(byte) 0) goto init_plot_tables::@1 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::x#1 init_plot_tables::bits#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b1
-  //SEG79 [49] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
-  //SEG80 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
+  //SEG77 [47] phi from init_plot_tables::@2 to init_plot_tables::@3 [phi:init_plot_tables::@2->init_plot_tables::@3]
+  //SEG78 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#0] -- zpptrby1=coby1 
     lda #0
     sta yoffs
     sta yoffs+1
-  //SEG81 [49] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
+  //SEG79 [47] phi (byte) init_plot_tables::y#2 = (byte) 0 [phi:init_plot_tables::@2->init_plot_tables::@3#1] -- xby=coby1 
     ldx #0
-  //SEG82 [49] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
-  //SEG83 [49] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
-  //SEG84 [49] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
-  //SEG85 init_plot_tables::@3
+  //SEG80 [47] phi from init_plot_tables::@4 to init_plot_tables::@3 [phi:init_plot_tables::@4->init_plot_tables::@3]
+  //SEG81 [47] phi (byte*) init_plot_tables::yoffs#2 = (byte*) init_plot_tables::yoffs#4 [phi:init_plot_tables::@4->init_plot_tables::@3#0] -- register_copy 
+  //SEG82 [47] phi (byte) init_plot_tables::y#2 = (byte) init_plot_tables::y#1 [phi:init_plot_tables::@4->init_plot_tables::@3#1] -- register_copy 
+  //SEG83 init_plot_tables::@3
   b3:
-  //SEG86 [50] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
+  //SEG84 [48] (byte~) init_plot_tables::$6 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 ] ) -- zpby1=xby_band_coby1 
     txa
     and #7
     sta _6
-  //SEG87 [51] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
+  //SEG85 [49] (byte~) init_plot_tables::$7 ← < (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$6 init_plot_tables::$7 ] ) -- aby=_lo_zpptrby1 
     lda yoffs
-  //SEG88 [52] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
+  //SEG86 [50] (byte~) init_plot_tables::$8 ← (byte~) init_plot_tables::$6 | (byte~) init_plot_tables::$7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$8 ] ) -- aby=zpby1_bor_aby 
     ora _6
-  //SEG89 [53] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG87 [51] *((const byte[]) plot_ylo#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$8 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_ylo,x
-  //SEG90 [54] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
+  //SEG88 [52] (byte~) init_plot_tables::$9 ← > (byte*) init_plot_tables::yoffs#2 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$9 ] ) -- aby=_hi_zpptrby1 
     lda yoffs+1
-  //SEG91 [55] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG89 [53] *((const byte[]) plot_yhi#0 + (byte) init_plot_tables::y#2) ← (byte~) init_plot_tables::$9 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- cowo1_staridx_xby=aby 
     sta plot_yhi,x
-  //SEG92 [56] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
+  //SEG90 [54] (byte~) init_plot_tables::$10 ← (byte) init_plot_tables::y#2 & (byte) 7 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 init_plot_tables::$10 ] ) -- aby=xby_band_coby1 
     txa
     and #7
-  //SEG93 [57] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
+  //SEG91 [55] if((byte~) init_plot_tables::$10!=(byte) 7) goto init_plot_tables::@4 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#2 ] ) -- aby_neq_coby1_then_la1 
     cmp #7
     bne b4
-  //SEG94 init_plot_tables::@7
-  //SEG95 [58] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
+  //SEG92 init_plot_tables::@7
+  //SEG93 [56] (byte*) init_plot_tables::yoffs#1 ← (byte*) init_plot_tables::yoffs#2 + (word) 320 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#2 init_plot_tables::yoffs#1 ] ) -- zpptrby1=zpptrby1_plus_cowo1 
     lda yoffs
     clc
     adc #<$140
@@ -8824,82 +8694,82 @@ init_plot_tables: {
     lda yoffs+1
     adc #>$140
     sta yoffs+1
-  //SEG96 [59] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
-  //SEG97 [59] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
-  //SEG98 init_plot_tables::@4
+  //SEG94 [57] phi from init_plot_tables::@3 init_plot_tables::@7 to init_plot_tables::@4 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4]
+  //SEG95 [57] phi (byte*) init_plot_tables::yoffs#4 = (byte*) init_plot_tables::yoffs#2 [phi:init_plot_tables::@3/init_plot_tables::@7->init_plot_tables::@4#0] -- register_copy 
+  //SEG96 init_plot_tables::@4
   b4:
-  //SEG99 [60] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
+  //SEG97 [58] (byte) init_plot_tables::y#1 ← ++ (byte) init_plot_tables::y#2 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby=_inc_xby 
     inx
-  //SEG100 [61] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
+  //SEG98 [59] if((byte) init_plot_tables::y#1!=(byte) 0) goto init_plot_tables::@3 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ( main:0::init_plot_tables:6 [ init_plot_tables::y#1 init_plot_tables::yoffs#4 ] ) -- xby_neq_0_then_la1 
     cpx #0
     bne b3
-  //SEG101 init_plot_tables::@return
-  //SEG102 [62] return  [ ] ( main:0::init_plot_tables:6 [ ] )
+  //SEG99 init_plot_tables::@return
+  //SEG100 [60] return  [ ] ( main:0::init_plot_tables:6 [ ] )
     rts
-  //SEG103 init_plot_tables::@10
+  //SEG101 init_plot_tables::@10
   b10:
-  //SEG104 [46] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
-  //SEG105 [46] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
+  //SEG102 [44] phi from init_plot_tables::@10 to init_plot_tables::@2 [phi:init_plot_tables::@10->init_plot_tables::@2]
+  //SEG103 [44] phi (byte) init_plot_tables::bits#4 = (byte) init_plot_tables::bits#1 [phi:init_plot_tables::@10->init_plot_tables::@2#0] -- register_copy 
     jmp b2
 }
-//SEG106 init_screen
+//SEG104 init_screen
 init_screen: {
     .label b = 3
     .label c = 3
-  //SEG107 [64] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
-  //SEG108 [64] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
+  //SEG105 [62] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
+  //SEG106 [62] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- zpptrby1=cowo1 
     lda #<BITMAP
     sta b
     lda #>BITMAP
     sta b+1
-  //SEG109 [64] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
-  //SEG110 [64] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
-  //SEG111 init_screen::@1
+  //SEG107 [62] phi from init_screen::@1 to init_screen::@1 [phi:init_screen::@1->init_screen::@1]
+  //SEG108 [62] phi (byte*) init_screen::b#2 = (byte*) init_screen::b#1 [phi:init_screen::@1->init_screen::@1#0] -- register_copy 
+  //SEG109 init_screen::@1
   b1:
-  //SEG112 [65] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG110 [63] *((byte*) init_screen::b#2) ← (byte) 0 [ init_screen::b#2 ] ( main:0::init_screen:5 [ init_screen::b#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #0
     sta (b),y
-  //SEG113 [66] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG111 [64] (byte*) init_screen::b#1 ← ++ (byte*) init_screen::b#2 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc b
     bne !+
     inc b+1
   !:
-  //SEG114 [67] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG112 [65] if((byte*) init_screen::b#1!=(const byte*) BITMAP#0+(word) 8192) goto init_screen::@1 [ init_screen::b#1 ] ( main:0::init_screen:5 [ init_screen::b#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda b+1
     cmp #>BITMAP+$2000
     bne b1
     lda b
     cmp #<BITMAP+$2000
     bne b1
-  //SEG115 [68] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
-  //SEG116 [68] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
+  //SEG113 [66] phi from init_screen::@1 to init_screen::@2 [phi:init_screen::@1->init_screen::@2]
+  //SEG114 [66] phi (byte*) init_screen::c#2 = (const byte*) SCREEN#0 [phi:init_screen::@1->init_screen::@2#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta c
     lda #>SCREEN
     sta c+1
-  //SEG117 [68] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
-  //SEG118 [68] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
-  //SEG119 init_screen::@2
+  //SEG115 [66] phi from init_screen::@2 to init_screen::@2 [phi:init_screen::@2->init_screen::@2]
+  //SEG116 [66] phi (byte*) init_screen::c#2 = (byte*) init_screen::c#1 [phi:init_screen::@2->init_screen::@2#0] -- register_copy 
+  //SEG117 init_screen::@2
   b2:
-  //SEG120 [69] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG118 [67] *((byte*) init_screen::c#2) ← (byte) 20 [ init_screen::c#2 ] ( main:0::init_screen:5 [ init_screen::c#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #$14
     sta (c),y
-  //SEG121 [70] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG119 [68] (byte*) init_screen::c#1 ← ++ (byte*) init_screen::c#2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc c
     bne !+
     inc c+1
   !:
-  //SEG122 [71] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
+  //SEG120 [69] if((byte*) init_screen::c#1!=(const byte*) SCREEN#0+(word) 1024) goto init_screen::@2 [ init_screen::c#1 ] ( main:0::init_screen:5 [ init_screen::c#1 ] ) -- zpptrby1_neq_cowo1_then_la1 
     lda c+1
     cmp #>SCREEN+$400
     bne b2
     lda c
     cmp #<SCREEN+$400
     bne b2
-  //SEG123 init_screen::@return
-  //SEG124 [72] return  [ ] ( main:0::init_screen:5 [ ] )
+  //SEG121 init_screen::@return
+  //SEG122 [70] return  [ ] ( main:0::init_screen:5 [ ] )
     rts
 }
 
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.sym b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.sym
index 443a31300..e1d0ef2eb 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.sym
+++ b/src/main/java/dk/camelot64/kickc/test/ref/bitmap-plotter.sym
@@ -72,8 +72,6 @@
 (byte*) init_screen::c#1 c zp ZP_PTR_BYTE:3 16.5
 (byte*) init_screen::c#2 c zp ZP_PTR_BYTE:3 16.5
 (void()) main()
-(byte~) main::$6 reg byte a 22.0
-(byte~) main::$8 reg byte a 22.0
 (label) main::@2
 (label) main::@3
 (label) main::@5
@@ -130,8 +128,6 @@ reg byte x [ init_plot_tables::x#2 init_plot_tables::x#1 ]
 reg byte y [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ]
 reg byte x [ init_plot_tables::y#2 init_plot_tables::y#1 ]
 zp ZP_PTR_BYTE:3 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#1 plot::plotter_x#2 plot::plotter#0 ]
-reg byte a [ main::$6 ]
-reg byte a [ main::$8 ]
 reg byte y [ plots::$0 ]
 reg byte a [ plots::$1 ]
 reg byte y [ plot::x#0 ]
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/scroll.asm b/src/main/java/dk/camelot64/kickc/test/ref/scroll.asm
index f797be32d..f643bd2d8 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/scroll.asm
+++ b/src/main/java/dk/camelot64/kickc/test/ref/scroll.asm
@@ -24,10 +24,7 @@ main: {
     lda RASTER
     cmp #$ff
     bne b3
-    lda BGCOL
-    clc
-    adc #1
-    sta BGCOL
+    inc BGCOL
     dex
     cpx #$ff
     bne b4
@@ -57,10 +54,7 @@ main: {
     ldx #7
   b4:
     stx SCROLL
-    lda BGCOL
-    sec
-    sbc #1
-    sta BGCOL
+    dec BGCOL
     jmp b2
     rts
 }
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/scroll.cfg b/src/main/java/dk/camelot64/kickc/test/ref/scroll.cfg
index 58d02d902..90060aaf4 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/scroll.cfg
+++ b/src/main/java/dk/camelot64/kickc/test/ref/scroll.cfg
@@ -17,51 +17,49 @@ main::@3: scope:[main]  from main::@2 main::@3
   [5] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] )
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] )
-  [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] )
-  [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
-  [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
+  [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] )
+  [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
+  [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@8
-  [10] (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
-  [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] )
-  [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
-  [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
-  [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
+  [9] (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
+  [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] )
+  [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
+  [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
+  [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
   to:main::@10
 main::@10: scope:[main]  from main::@5
-  [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
-  [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
+  [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
+  [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
   to:main::@11
 main::@11: scope:[main]  from main::@10
-  [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] )
+  [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] )
   to:main::@6
 main::@6: scope:[main]  from main::@10 main::@11
-  [18] (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
-  [18] (byte) main::c#2 ← phi( main::@10/(byte) main::c#0 main::@11/(byte) main::c#1 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
-  [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] )
-  [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] )
+  [17] (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
+  [17] (byte) main::c#2 ← phi( main::@10/(byte) main::c#0 main::@11/(byte) main::c#1 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
+  [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] )
+  [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] )
   to:main::@4
 main::@4: scope:[main]  from main::@6 main::@8
-  [21] (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [21] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] )
-  [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [20] (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [20] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
   to:main::@return
 main::@return: scope:[main]  from main::@4
-  [26] return  [ ] ( main:0 [ ] )
+  [24] return  [ ] ( main:0 [ ] )
   to:@return
 fillscreen: scope:[fillscreen]  from main
-  [27] phi() [ ] ( main:0::fillscreen:2 [ ] )
+  [25] phi() [ ] ( main:0::fillscreen:2 [ ] )
   to:fillscreen::@1
 fillscreen::@1: scope:[fillscreen]  from fillscreen fillscreen::@1
-  [28] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@1/(byte*) fillscreen::cursor#1 ) [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
-  [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
-  [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
-  [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
+  [26] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@1/(byte*) fillscreen::cursor#1 ) [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
+  [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
+  [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
+  [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
   to:fillscreen::@return
 fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
-  [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  [30] return  [ ] ( main:0::fillscreen:2 [ ] )
   to:@return
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/scroll.log b/src/main/java/dk/camelot64/kickc/test/ref/scroll.log
index bf27001a4..a23776a4f 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/scroll.log
+++ b/src/main/java/dk/camelot64/kickc/test/ref/scroll.log
@@ -13,7 +13,7 @@ void main() {
         // Wait for raster
         do {} while(*RASTER!=$fe);
         do {} while(*RASTER!=$ff);
-        *BGCOL = *BGCOL+1;
+        (*BGCOL)++;
         // Soft scroll
         if(--scroll==$ff) {
             scroll = 7;
@@ -31,7 +31,7 @@ void main() {
             nxt++;
         }
         *SCROLL = scroll;
-        *BGCOL = *BGCOL-1;
+        (*BGCOL)--;
     } while(true);
 }
 
@@ -40,9 +40,11 @@ void fillscreen(byte* screen, byte fill) {
         *cursor = fill;
     }
 }
+Adding pre/post-modifier *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
 Adding pre/post-modifier (byte) main::scroll ← -- (byte) main::scroll
 Adding pre/post-modifier (byte) main::i ← ++ (byte) main::i
 Adding pre/post-modifier (byte*) main::nxt ← ++ (byte*) main::nxt
+Adding pre/post-modifier *((byte*) BGCOL) ← -- *((byte*) BGCOL)
 Adding pre/post-modifier (byte*) fillscreen::cursor ← ++ (byte*) fillscreen::cursor
 PROGRAM
   (byte*) SCREEN ← (word) 1024
@@ -63,25 +65,24 @@ main::@2:
 main::@3:
   (boolean~) main::$3 ← *((byte*) RASTER) != (byte) 255
   if((boolean~) main::$3) goto main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$4
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
   (byte) main::scroll ← -- (byte) main::scroll
-  (boolean~) main::$5 ← (byte) main::scroll == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   (byte) main::scroll ← (byte) 7
   (byte) main::i ← (byte) 0
 main::@5:
-  (byte~) main::$7 ← (byte) main::i + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line *idx (byte~) main::$7
-  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line *idx (byte~) main::$6
+  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$7
   (byte) main::i ← ++ (byte) main::i
-  (boolean~) main::$9 ← (byte) main::i != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   (byte) main::c ← *((byte*) main::nxt)
-  (boolean~) main::$10 ← (byte) main::c == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   (byte*) main::nxt ← (byte*) TEXT
   (byte) main::c ← *((byte*) main::nxt)
 main::@6:
@@ -89,8 +90,7 @@ main::@6:
   (byte*) main::nxt ← ++ (byte*) main::nxt
 main::@4:
   *((byte*) SCROLL) ← (byte) main::scroll
-  (byte~) main::$12 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$12
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
 main::@return:
   return 
@@ -126,15 +126,13 @@ SYMBOLS
 (void~) main::$0
 (byte*~) main::$1
 (boolean~) main::$10
-(boolean~) main::$11
-(byte~) main::$12
 (boolean~) main::$2
 (boolean~) main::$3
-(byte~) main::$4
+(boolean~) main::$4
 (boolean~) main::$5
-(boolean~) main::$6
+(byte~) main::$6
 (byte~) main::$7
-(byte~) main::$8
+(boolean~) main::$8
 (boolean~) main::$9
 (label) main::@1
 (label) main::@2
@@ -177,17 +175,15 @@ main::@3: scope:[main]  from main::@3 main::@7
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$4
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
   (byte) main::scroll ← -- (byte) main::scroll
-  (boolean~) main::$5 ← (byte) main::scroll == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   *((byte*) SCROLL) ← (byte) main::scroll
-  (byte~) main::$12 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$12
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
   to:main::@12
 main::@9: scope:[main]  from main::@8
@@ -195,18 +191,18 @@ main::@9: scope:[main]  from main::@8
   (byte) main::i ← (byte) 0
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
-  (byte~) main::$7 ← (byte) main::i + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line *idx (byte~) main::$7
-  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line *idx (byte~) main::$6
+  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$7
   (byte) main::i ← ++ (byte) main::i
-  (boolean~) main::$9 ← (byte) main::i != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c ← *((byte*) main::nxt)
-  (boolean~) main::$10 ← (byte) main::c == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   *((byte[]) main::line + (byte) 39) ← (byte) main::c
@@ -273,17 +269,15 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$4
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
   (byte) main::scroll ← -- (byte) main::scroll
-  (boolean~) main::$5 ← (byte) main::scroll == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   *((byte*) SCROLL) ← (byte) main::scroll
-  (byte~) main::$12 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$12
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -291,18 +285,18 @@ main::@9: scope:[main]  from main::@8
   (byte) main::i ← (byte) 0
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
-  (byte~) main::$7 ← (byte) main::i + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line *idx (byte~) main::$7
-  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line *idx (byte~) main::$6
+  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$7
   (byte) main::i ← ++ (byte) main::i
-  (boolean~) main::$9 ← (byte) main::i != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c ← *((byte*) main::nxt)
-  (boolean~) main::$10 ← (byte) main::c == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   *((byte[]) main::line + (byte) 39) ← (byte) main::c
@@ -365,17 +359,15 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL) + (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$4
+  *((byte*) BGCOL) ← ++ *((byte*) BGCOL)
   (byte) main::scroll ← -- (byte) main::scroll
-  (boolean~) main::$5 ← (byte) main::scroll == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   *((byte*) SCROLL) ← (byte) main::scroll
-  (byte~) main::$12 ← *((byte*) BGCOL) - (byte) 1
-  *((byte*) BGCOL) ← (byte~) main::$12
+  *((byte*) BGCOL) ← -- *((byte*) BGCOL)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -383,18 +375,18 @@ main::@9: scope:[main]  from main::@8
   (byte) main::i ← (byte) 0
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
-  (byte~) main::$7 ← (byte) main::i + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line *idx (byte~) main::$7
-  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line *idx (byte~) main::$6
+  *((byte[]) main::line + (byte) main::i) ← (byte~) main::$7
   (byte) main::i ← ++ (byte) main::i
-  (boolean~) main::$9 ← (byte) main::i != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c ← *((byte*) main::nxt)
-  (boolean~) main::$10 ← (byte) main::c == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   *((byte[]) main::line + (byte) 39) ← (byte) main::c
@@ -505,12 +497,11 @@ main::@8: scope:[main]  from main::@3
   (byte*) SCROLL#3 ← phi( main::@3/(byte*) SCROLL#4 )
   (byte) main::scroll#3 ← phi( main::@3/(byte) main::scroll#5 )
   (byte*) BGCOL#1 ← phi( main::@3/(byte*) BGCOL#3 )
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$5 ← (byte) main::scroll#1 == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll#1 == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#12 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#8 )
@@ -521,8 +512,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#3 )
   (byte) main::scroll#4 ← phi( main::@6/(byte) main::scroll#6 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#4
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -544,12 +534,12 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#5 ← phi( main::@5/(byte*) main::nxt#5 main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@5/(byte[]) main::line#1 main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte*) RASTER#10 ← phi( main::@5/(byte*) RASTER#12 )
@@ -560,9 +550,9 @@ main::@10: scope:[main]  from main::@5
   (byte[]) main::line#4 ← phi( main::@5/(byte[]) main::line#1 )
   (byte*) main::nxt#3 ← phi( main::@5/(byte*) main::nxt#5 )
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$10 ← (byte) main::c#0 == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c#0 == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) TEXT#13 ← phi( main::@10/(byte*) TEXT#4 main::@11/(byte*) TEXT#2 )
@@ -687,12 +677,11 @@ main::@8: scope:[main]  from main::@3
   (byte*) SCROLL#3 ← phi( main::@3/(byte*) SCROLL#4 )
   (byte) main::scroll#3 ← phi( main::@3/(byte) main::scroll#5 )
   (byte*) BGCOL#1 ← phi( main::@3/(byte*) BGCOL#3 )
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$5 ← (byte) main::scroll#1 == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll#1 == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#12 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#8 )
@@ -703,8 +692,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#3 )
   (byte) main::scroll#4 ← phi( main::@6/(byte) main::scroll#6 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#4
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -726,12 +714,12 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#5 ← phi( main::@5/(byte*) main::nxt#5 main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@5/(byte[]) main::line#1 main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte*) RASTER#10 ← phi( main::@5/(byte*) RASTER#12 )
@@ -742,9 +730,9 @@ main::@10: scope:[main]  from main::@5
   (byte[]) main::line#4 ← phi( main::@5/(byte[]) main::line#1 )
   (byte*) main::nxt#3 ← phi( main::@5/(byte*) main::nxt#5 )
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$10 ← (byte) main::c#0 == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c#0 == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) TEXT#13 ← phi( main::@10/(byte*) TEXT#4 main::@11/(byte*) TEXT#2 )
@@ -891,15 +879,13 @@ INITIAL SSA SYMBOL TABLE
 (void()) main()
 (byte*~) main::$1
 (boolean~) main::$10
-(boolean~) main::$11
-(byte~) main::$12
 (boolean~) main::$2
 (boolean~) main::$3
-(byte~) main::$4
+(boolean~) main::$4
 (boolean~) main::$5
-(boolean~) main::$6
+(byte~) main::$6
 (byte~) main::$7
-(byte~) main::$8
+(boolean~) main::$8
 (boolean~) main::$9
 (label) main::@1
 (label) main::@10
@@ -1030,12 +1016,11 @@ main::@8: scope:[main]  from main::@3
   (byte*) SCROLL#3 ← phi( main::@3/(byte*) SCROLL#4 )
   (byte) main::scroll#3 ← phi( main::@3/(byte) main::scroll#5 )
   (byte*) BGCOL#1 ← phi( main::@3/(byte*) BGCOL#3 )
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$5 ← (byte) main::scroll#1 == (byte) 255
-  (boolean~) main::$6 ← ! (boolean~) main::$5
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$4 ← (byte) main::scroll#1 == (byte) 255
+  (boolean~) main::$5 ← ! (boolean~) main::$4
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#12 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#8 )
@@ -1046,8 +1031,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#3 )
   (byte) main::scroll#4 ← phi( main::@6/(byte) main::scroll#6 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#4
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1069,12 +1053,12 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#5 ← phi( main::@5/(byte*) main::nxt#5 main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@5/(byte[]) main::line#1 main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte*) RASTER#10 ← phi( main::@5/(byte*) RASTER#12 )
@@ -1085,9 +1069,9 @@ main::@10: scope:[main]  from main::@5
   (byte[]) main::line#4 ← phi( main::@5/(byte[]) main::line#1 )
   (byte*) main::nxt#3 ← phi( main::@5/(byte*) main::nxt#5 )
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$10 ← (byte) main::c#0 == (byte) '@'
-  (boolean~) main::$11 ← ! (boolean~) main::$10
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$9 ← (byte) main::c#0 == (byte) '@'
+  (boolean~) main::$10 ← ! (boolean~) main::$9
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) TEXT#13 ← phi( main::@10/(byte*) TEXT#4 main::@11/(byte*) TEXT#2 )
@@ -1142,8 +1126,8 @@ fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
   to:@end
 @end: scope:[]  from @2
 
-Inversing boolean not (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255 from (boolean~) main::$5 ← (byte) main::scroll#1 == (byte) 255
-Inversing boolean not (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@' from (boolean~) main::$10 ← (byte) main::c#0 == (byte) '@'
+Inversing boolean not (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255 from (boolean~) main::$4 ← (byte) main::scroll#1 == (byte) 255
+Inversing boolean not (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@' from (boolean~) main::$9 ← (byte) main::c#0 == (byte) '@'
 Succesful SSA optimization Pass2UnaryNotSimplification
 CONTROL FLOW GRAPH
 @begin: scope:[]  from
@@ -1213,11 +1197,10 @@ main::@8: scope:[main]  from main::@3
   (byte*) SCROLL#3 ← phi( main::@3/(byte*) SCROLL#4 )
   (byte) main::scroll#3 ← phi( main::@3/(byte) main::scroll#5 )
   (byte*) BGCOL#1 ← phi( main::@3/(byte*) BGCOL#3 )
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#12 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#8 )
@@ -1228,8 +1211,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#3 )
   (byte) main::scroll#4 ← phi( main::@6/(byte) main::scroll#6 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#4
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1251,12 +1233,12 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#5 ← phi( main::@5/(byte*) main::nxt#5 main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@5/(byte[]) main::line#1 main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte*) RASTER#10 ← phi( main::@5/(byte*) RASTER#12 )
@@ -1267,8 +1249,8 @@ main::@10: scope:[main]  from main::@5
   (byte[]) main::line#4 ← phi( main::@5/(byte[]) main::line#1 )
   (byte*) main::nxt#3 ← phi( main::@5/(byte*) main::nxt#5 )
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@'
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@'
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) TEXT#13 ← phi( main::@10/(byte*) TEXT#4 main::@11/(byte*) TEXT#2 )
@@ -1406,11 +1388,10 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#11 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#7 )
@@ -1421,8 +1402,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#11 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) main::scroll#6 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1438,17 +1418,17 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#3 ← phi( main::@5/(byte*) main::nxt#3 main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@5/(byte[]) main::line#1 main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@'
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@'
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) TEXT#13 ← phi( main::@10/(byte*) TEXT#2 main::@11/(byte*) TEXT#2 )
@@ -1549,11 +1529,10 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#11 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#7 )
@@ -1564,8 +1543,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#11 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) main::scroll#11 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1581,17 +1559,17 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#3 ← phi( main::@5/(byte*) main::nxt#3 main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@5/(byte[]) main::line#1 main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@'
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@'
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#3 main::@11/(byte*) main::nxt#2 )
@@ -1703,11 +1681,10 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#1) + (byte) 1
-  *((byte*) BGCOL#1) ← (byte~) main::$4
+  *((byte*) BGCOL#1) ← ++ *((byte*) BGCOL#1)
   (byte) main::scroll#1 ← -- (byte) main::scroll#3
-  (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#11 ← phi( main::@6/(byte*) TEXT#13 main::@8/(byte*) TEXT#7 )
@@ -1718,8 +1695,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#2 main::@8/(byte*) SCROLL#11 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) main::scroll#11 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1735,17 +1711,17 @@ main::@5: scope:[main]  from main::@5 main::@9
   (byte*) main::nxt#3 ← phi( main::@9/(byte*) main::nxt#6 )
   (byte[]) main::line#1 ← phi( main::@9/(byte[]) main::line#3 )
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#1 *idx (byte~) main::$7
-  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#1 *idx (byte~) main::$6
+  *((byte[]) main::line#1 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c#0 ← *((byte*) main::nxt#3)
-  (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@'
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@'
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#3 main::@11/(byte*) main::nxt#2 )
@@ -1833,11 +1809,10 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
-  (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) TEXT#11 ← phi( main::@6/(byte*) TEXT#10 main::@8/(byte*) TEXT#10 )
@@ -1848,8 +1823,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) SCROLL#1 ← phi( main::@6/(byte*) SCROLL#7 main::@8/(byte*) SCROLL#7 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#1) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#2) - (byte) 1
-  *((byte*) BGCOL#2) ← (byte~) main::$12
+  *((byte*) BGCOL#2) ← -- *((byte*) BGCOL#2)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1858,17 +1832,17 @@ main::@9: scope:[main]  from main::@8
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c#0 ← *((byte*) main::nxt#9)
-  (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@'
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@'
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(byte*) main::nxt#2 )
@@ -1943,18 +1917,16 @@ main::@3: scope:[main]  from main::@2 main::@3
   if((boolean~) main::$3) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
-  (boolean~) main::$6 ← (byte) main::scroll#1 != (byte) 255
-  if((boolean~) main::$6) goto main::@4
+  (boolean~) main::$5 ← (byte) main::scroll#1 != (byte) 255
+  if((boolean~) main::$5) goto main::@4
   to:main::@9
 main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -1963,17 +1935,17 @@ main::@9: scope:[main]  from main::@8
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
-  (boolean~) main::$9 ← (byte) main::i#1 != (byte) 39
-  if((boolean~) main::$9) goto main::@5
+  (boolean~) main::$8 ← (byte) main::i#1 != (byte) 39
+  if((boolean~) main::$8) goto main::@5
   to:main::@10
 main::@10: scope:[main]  from main::@5
   (byte) main::c#0 ← *((byte*) main::nxt#9)
-  (boolean~) main::$11 ← (byte) main::c#0 != (byte) '@'
-  if((boolean~) main::$11) goto main::@6
+  (boolean~) main::$10 ← (byte) main::c#0 != (byte) '@'
+  if((boolean~) main::$10) goto main::@6
   to:main::@11
 main::@6: scope:[main]  from main::@10 main::@11
   (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(byte*) main::nxt#2 )
@@ -2008,9 +1980,9 @@ fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
 
 Simple Condition (boolean~) main::$2 if(*((byte*) RASTER#1)!=(byte) 254) goto main::@2
 Simple Condition (boolean~) main::$3 if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
-Simple Condition (boolean~) main::$6 if((byte) main::scroll#1!=(byte) 255) goto main::@4
-Simple Condition (boolean~) main::$9 if((byte) main::i#1!=(byte) 39) goto main::@5
-Simple Condition (boolean~) main::$11 if((byte) main::c#0!=(byte) '@') goto main::@6
+Simple Condition (boolean~) main::$5 if((byte) main::scroll#1!=(byte) 255) goto main::@4
+Simple Condition (boolean~) main::$8 if((byte) main::i#1!=(byte) 39) goto main::@5
+Simple Condition (boolean~) main::$10 if((byte) main::c#0!=(byte) '@') goto main::@6
 Simple Condition (boolean~) fillscreen::$1 if((byte*) fillscreen::cursor#1<(byte*~) fillscreen::$0) goto fillscreen::@1
 Succesful SSA optimization Pass2ConditionalJumpSimplification
 CONTROL FLOW GRAPH
@@ -2047,8 +2019,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@9
@@ -2056,8 +2027,7 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
@@ -2066,9 +2036,9 @@ main::@9: scope:[main]  from main::@8
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2143,8 +2113,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@9
@@ -2152,17 +2121,16 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2228,8 +2196,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@9
@@ -2237,17 +2204,16 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2311,8 +2277,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@9
@@ -2320,17 +2285,16 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@1
   to:main::@return
 main::@9: scope:[main]  from main::@8
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@9
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@9/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2392,8 +2356,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2401,15 +2364,14 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2478,8 +2440,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((byte*) RASTER#1)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((byte*) BGCOL#5) + (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$4
+  *((byte*) BGCOL#5) ← ++ *((byte*) BGCOL#5)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2487,15 +2448,14 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((byte*) SCROLL#7) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((byte*) BGCOL#5) - (byte) 1
-  *((byte*) BGCOL#5) ← (byte~) main::$12
+  *((byte*) BGCOL#5) ← -- *((byte*) BGCOL#5)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (byte[]) main::line#8 *idx (byte~) main::$7
-  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (byte[]) main::line#8 *idx (byte~) main::$6
+  *((byte[]) main::line#8 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2553,8 +2513,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$4
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2562,15 +2521,14 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((const byte*) SCROLL#0) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$12
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (const byte[]) main::line#0 *idx (byte~) main::$7
-  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (const byte[]) main::line#0 *idx (byte~) main::$6
+  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2624,8 +2582,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$4
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2633,15 +2590,14 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((const byte*) SCROLL#0) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$12
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2 + (byte) 1
-  (byte~) main::$8 ← (const byte[]) main::line#0 *idx (byte~) main::$7
-  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2 + (byte) 1
+  (byte~) main::$7 ← (const byte[]) main::line#0 *idx (byte~) main::$6
+  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2678,7 +2634,7 @@ fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
 @end: scope:[]  from @2
 
 Multiple usages for variable. Not optimizing sub-constant (byte) main::i#2
-Consolidated referenced array index constant in assignment main::$8
+Consolidated referenced array index constant in assignment main::$7
 Multiple usages for variable. Not optimizing sub-constant (byte) main::i#2
 Consolidated assigned array index constant in assignment *(main::line#0+39)
 Succesful SSA optimization Pass2ConstantAdditionElimination
@@ -2697,8 +2653,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$4
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2706,15 +2661,14 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((const byte*) SCROLL#0) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$12
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(const byte) main::i#0 )
-  (byte~) main::$7 ← (byte) main::i#2
-  (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte~) main::$7
-  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$6 ← (byte) main::i#2
+  (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte~) main::$6
+  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2751,7 +2705,7 @@ fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
 @end: scope:[]  from @2
 
 Multiple usages for variable. Not optimizing sub-constant (byte) main::i#2
-Alias (byte) main::i#2 = (byte~) main::$7 
+Alias (byte) main::i#2 = (byte~) main::$6 
 Succesful SSA optimization Pass2AliasElimination
 CONTROL FLOW GRAPH
 @begin: scope:[]  from
@@ -2768,8 +2722,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$4
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2777,14 +2730,13 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(const byte) main::scroll#2 main::@8/(byte) main::scroll#1 )
   *((const byte*) SCROLL#0) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$12
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(const byte) main::i#0 )
-  (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2
-  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2
+  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2865,8 +2817,7 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$4
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@4
   to:main::@5
@@ -2874,14 +2825,13 @@ main::@4: scope:[main]  from main::@6 main::@8
   (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 )
   *((const byte*) SCROLL#0) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$12
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@2
   to:main::@return
 main::@5: scope:[main]  from main::@5 main::@8
   (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 )
-  (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2
-  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2
+  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@5
   to:main::@10
@@ -2941,9 +2891,7 @@ FINAL SYMBOL TABLE
 (const byte) fillscreen::fill#0 = (byte) 32
 (byte*) fillscreen::screen
 (void()) main()
-(byte~) main::$12
-(byte~) main::$4
-(byte~) main::$8
+(byte~) main::$7
 (label) main::@10
 (label) main::@11
 (label) main::@2
@@ -2998,15 +2946,14 @@ main::@3: scope:[main]  from main::@2 main::@3
   if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$4
+  *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0)
   (byte) main::scroll#1 ← -- (byte) main::scroll#7
   if((byte) main::scroll#1!=(byte) 255) goto main::@17
   to:main::@5
 main::@5: scope:[main]  from main::@15 main::@8
   (byte) main::i#2 ← phi( main::@15/(byte~) main::i#3 main::@8/(byte) 0 )
-  (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2
-  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8
+  (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2
+  *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7
   (byte) main::i#1 ← ++ (byte) main::i#2
   if((byte) main::i#1!=(byte) 39) goto main::@15
   to:main::@10
@@ -3029,8 +2976,7 @@ main::@4: scope:[main]  from main::@17 main::@6
   (byte*) main::nxt#10 ← phi( main::@6/(byte*~) main::nxt#14 main::@17/(byte*~) main::nxt#15 )
   (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@17/(byte~) main::scroll#13 )
   *((const byte*) SCROLL#0) ← (byte) main::scroll#10
-  (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1
-  *((const byte*) BGCOL#0) ← (byte~) main::$12
+  *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0)
   if(true) goto main::@14
   to:main::@return
 main::@return: scope:[main]  from main::@4
@@ -3080,7 +3026,6 @@ Propagating live ranges...
 Propagating live ranges...
 Propagating live ranges...
 Propagating live ranges...
-Propagating live ranges...
 CONTROL FLOW GRAPH - LIVE RANGES FOUND
 @begin: scope:[]  from
   to:@2
@@ -3101,86 +3046,84 @@ main::@3: scope:[main]  from main::@2 main::@3
   [5] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3 [ main::scroll#7 main::nxt#9 ]
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ]
-  [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ]
-  [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ]
-  [9] if((byte) main::scroll#1!=(byte) 255) goto main::@17 [ main::nxt#9 main::scroll#1 ]
+  [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ]
+  [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ]
+  [8] if((byte) main::scroll#1!=(byte) 255) goto main::@17 [ main::nxt#9 main::scroll#1 ]
   to:main::@5
 main::@5: scope:[main]  from main::@15 main::@8
-  [10] (byte) main::i#2 ← phi( main::@15/(byte~) main::i#3 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ]
-  [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ]
-  [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ]
-  [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ]
-  [14] if((byte) main::i#1!=(byte) 39) goto main::@15 [ main::nxt#9 main::i#1 ]
+  [9] (byte) main::i#2 ← phi( main::@15/(byte~) main::i#3 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ]
+  [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ]
+  [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ]
+  [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ]
+  [13] if((byte) main::i#1!=(byte) 39) goto main::@15 [ main::nxt#9 main::i#1 ]
   to:main::@10
 main::@10: scope:[main]  from main::@5
-  [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ]
-  [16] if((byte) main::c#0!=(byte) '@') goto main::@16 [ main::nxt#9 main::c#0 ]
+  [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ]
+  [15] if((byte) main::c#0!=(byte) '@') goto main::@16 [ main::nxt#9 main::c#0 ]
   to:main::@11
 main::@11: scope:[main]  from main::@10
-  [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ]
-  [18] (byte~) main::c#4 ← (byte) main::c#1 [ main::c#4 ]
+  [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ]
+  [17] (byte~) main::c#4 ← (byte) main::c#1 [ main::c#4 ]
   to:main::@6
 main::@6: scope:[main]  from main::@11 main::@16
-  [19] (byte*) main::nxt#4 ← phi( main::@16/(byte*~) main::nxt#13 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ]
-  [19] (byte) main::c#2 ← phi( main::@16/(byte~) main::c#3 main::@11/(byte~) main::c#4 ) [ main::c#2 main::nxt#4 ]
-  [20] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ]
-  [21] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ]
-  [22] (byte*~) main::nxt#14 ← (byte*) main::nxt#1 [ main::nxt#14 ]
+  [18] (byte*) main::nxt#4 ← phi( main::@16/(byte*~) main::nxt#13 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ]
+  [18] (byte) main::c#2 ← phi( main::@16/(byte~) main::c#3 main::@11/(byte~) main::c#4 ) [ main::c#2 main::nxt#4 ]
+  [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ]
+  [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ]
+  [21] (byte*~) main::nxt#14 ← (byte*) main::nxt#1 [ main::nxt#14 ]
   to:main::@4
 main::@4: scope:[main]  from main::@17 main::@6
-  [23] (byte*) main::nxt#10 ← phi( main::@6/(byte*~) main::nxt#14 main::@17/(byte*~) main::nxt#15 ) [ main::scroll#10 main::nxt#10 ]
-  [23] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@17/(byte~) main::scroll#13 ) [ main::scroll#10 main::nxt#10 ]
-  [24] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ]
-  [25] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ]
-  [26] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ]
-  [27] if(true) goto main::@14 [ main::scroll#10 main::nxt#10 ]
+  [22] (byte*) main::nxt#10 ← phi( main::@6/(byte*~) main::nxt#14 main::@17/(byte*~) main::nxt#15 ) [ main::scroll#10 main::nxt#10 ]
+  [22] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@17/(byte~) main::scroll#13 ) [ main::scroll#10 main::nxt#10 ]
+  [23] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ]
+  [24] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ]
+  [25] if(true) goto main::@14 [ main::scroll#10 main::nxt#10 ]
   to:main::@return
 main::@return: scope:[main]  from main::@4
-  [28] return  [ ]
+  [26] return  [ ]
   to:@return
 main::@14: scope:[main]  from main::@4
-  [29] (byte~) main::scroll#12 ← (byte) main::scroll#10 [ main::scroll#12 main::nxt#10 ]
-  [30] (byte*~) main::nxt#12 ← (byte*) main::nxt#10 [ main::scroll#12 main::nxt#12 ]
+  [27] (byte~) main::scroll#12 ← (byte) main::scroll#10 [ main::scroll#12 main::nxt#10 ]
+  [28] (byte*~) main::nxt#12 ← (byte*) main::nxt#10 [ main::scroll#12 main::nxt#12 ]
   to:main::@2
 main::@16: scope:[main]  from main::@10
-  [31] (byte~) main::c#3 ← (byte) main::c#0 [ main::nxt#9 main::c#3 ]
-  [32] (byte*~) main::nxt#13 ← (byte*) main::nxt#9 [ main::c#3 main::nxt#13 ]
+  [29] (byte~) main::c#3 ← (byte) main::c#0 [ main::nxt#9 main::c#3 ]
+  [30] (byte*~) main::nxt#13 ← (byte*) main::nxt#9 [ main::c#3 main::nxt#13 ]
   to:main::@6
 main::@15: scope:[main]  from main::@5
-  [33] (byte~) main::i#3 ← (byte) main::i#1 [ main::nxt#9 main::i#3 ]
+  [31] (byte~) main::i#3 ← (byte) main::i#1 [ main::nxt#9 main::i#3 ]
   to:main::@5
 main::@17: scope:[main]  from main::@8
-  [34] (byte~) main::scroll#13 ← (byte) main::scroll#1 [ main::nxt#9 main::scroll#13 ]
-  [35] (byte*~) main::nxt#15 ← (byte*) main::nxt#9 [ main::scroll#13 main::nxt#15 ]
+  [32] (byte~) main::scroll#13 ← (byte) main::scroll#1 [ main::nxt#9 main::scroll#13 ]
+  [33] (byte*~) main::nxt#15 ← (byte*) main::nxt#9 [ main::scroll#13 main::nxt#15 ]
   to:main::@4
 fillscreen: scope:[fillscreen]  from main
-  [36] phi() [ ]
+  [34] phi() [ ]
   to:fillscreen::@1
 fillscreen::@1: scope:[fillscreen]  from fillscreen fillscreen::@3
-  [37] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@3/(byte*~) fillscreen::cursor#3 ) [ fillscreen::cursor#2 ]
-  [38] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ]
-  [39] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ]
-  [40] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@3 [ fillscreen::cursor#1 ]
+  [35] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@3/(byte*~) fillscreen::cursor#3 ) [ fillscreen::cursor#2 ]
+  [36] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ]
+  [37] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ]
+  [38] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@3 [ fillscreen::cursor#1 ]
   to:fillscreen::@return
 fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
-  [41] return  [ ]
+  [39] return  [ ]
   to:@return
 fillscreen::@3: scope:[fillscreen]  from fillscreen::@1
-  [42] (byte*~) fillscreen::cursor#3 ← (byte*) fillscreen::cursor#1 [ fillscreen::cursor#3 ]
+  [40] (byte*~) fillscreen::cursor#3 ← (byte*) fillscreen::cursor#1 [ fillscreen::cursor#3 ]
   to:fillscreen::@1
 
 Created 8 initial phi equivalence classes
-Coalesced [18] main::c#4 ← main::c#1
-Coalesced [22] main::nxt#14 ← main::nxt#1
-Coalesced [29] main::scroll#12 ← main::scroll#10
-Coalesced [30] main::nxt#12 ← main::nxt#10
-Coalesced [31] main::c#3 ← main::c#0
-Coalesced [32] main::nxt#13 ← main::nxt#9
-Coalesced [33] main::i#3 ← main::i#1
-Coalesced [34] main::scroll#13 ← main::scroll#1
-Coalesced (already) [35] main::nxt#15 ← main::nxt#9
-Coalesced [42] fillscreen::cursor#3 ← fillscreen::cursor#1
+Coalesced [17] main::c#4 ← main::c#1
+Coalesced [21] main::nxt#14 ← main::nxt#1
+Coalesced [27] main::scroll#12 ← main::scroll#10
+Coalesced [28] main::nxt#12 ← main::nxt#10
+Coalesced [29] main::c#3 ← main::c#0
+Coalesced [30] main::nxt#13 ← main::nxt#9
+Coalesced [31] main::i#3 ← main::i#1
+Coalesced [32] main::scroll#13 ← main::scroll#1
+Coalesced (already) [33] main::nxt#15 ← main::nxt#9
+Coalesced [40] fillscreen::cursor#3 ← fillscreen::cursor#1
 Coalesced down to 5 phi equivalence classes
 Culled Empty Block (label) main::@14
 Culled Empty Block (label) main::@16
@@ -3197,7 +3140,6 @@ Propagating live ranges...
 Propagating live ranges...
 Propagating live ranges...
 Propagating live ranges...
-Propagating live ranges...
 CONTROL FLOW GRAPH - BEFORE EFFECTIVE LIVE RANGES
 @begin: scope:[]  from
   to:@2
@@ -3218,53 +3160,51 @@ main::@3: scope:[main]  from main::@2 main::@3
   [5] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3 [ main::scroll#7 main::nxt#9 ]
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ]
-  [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ]
-  [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ]
-  [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ]
+  [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ]
+  [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ]
+  [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ]
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@8
-  [10] (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ]
-  [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ]
-  [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ]
-  [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ]
-  [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ]
+  [9] (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ]
+  [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ]
+  [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ]
+  [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ]
+  [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ]
   to:main::@10
 main::@10: scope:[main]  from main::@5
-  [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ]
-  [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ]
+  [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ]
+  [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ]
   to:main::@11
 main::@11: scope:[main]  from main::@10
-  [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ]
+  [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ]
   to:main::@6
 main::@6: scope:[main]  from main::@10 main::@11
-  [18] (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ]
-  [18] (byte) main::c#2 ← phi( main::@10/(byte) main::c#0 main::@11/(byte) main::c#1 ) [ main::c#2 main::nxt#4 ]
-  [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ]
-  [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ]
+  [17] (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ]
+  [17] (byte) main::c#2 ← phi( main::@10/(byte) main::c#0 main::@11/(byte) main::c#1 ) [ main::c#2 main::nxt#4 ]
+  [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ]
+  [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ]
   to:main::@4
 main::@4: scope:[main]  from main::@6 main::@8
-  [21] (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 ) [ main::scroll#10 main::nxt#10 ]
-  [21] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 ) [ main::scroll#10 main::nxt#10 ]
-  [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ]
-  [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ]
-  [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ]
-  [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ]
+  [20] (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 ) [ main::scroll#10 main::nxt#10 ]
+  [20] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 ) [ main::scroll#10 main::nxt#10 ]
+  [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ]
+  [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ]
+  [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ]
   to:main::@return
 main::@return: scope:[main]  from main::@4
-  [26] return  [ ]
+  [24] return  [ ]
   to:@return
 fillscreen: scope:[fillscreen]  from main
-  [27] phi() [ ]
+  [25] phi() [ ]
   to:fillscreen::@1
 fillscreen::@1: scope:[fillscreen]  from fillscreen fillscreen::@1
-  [28] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@1/(byte*) fillscreen::cursor#1 ) [ fillscreen::cursor#2 ]
-  [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ]
-  [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ]
-  [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ]
+  [26] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@1/(byte*) fillscreen::cursor#1 ) [ fillscreen::cursor#2 ]
+  [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ]
+  [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ]
+  [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ]
   to:fillscreen::@return
 fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
-  [32] return  [ ]
+  [30] return  [ ]
   to:@return
 
 CONTROL FLOW GRAPH - PHI MEM COALESCED
@@ -3287,53 +3227,51 @@ main::@3: scope:[main]  from main::@2 main::@3
   [5] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] )
   to:main::@8
 main::@8: scope:[main]  from main::@3
-  [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] )
-  [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] )
-  [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
-  [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
+  [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] )
+  [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
+  [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] )
   to:main::@5
 main::@5: scope:[main]  from main::@5 main::@8
-  [10] (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
-  [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] )
-  [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
-  [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
-  [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
+  [9] (byte) main::i#2 ← phi( main::@5/(byte) main::i#1 main::@8/(byte) 0 ) [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
+  [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] )
+  [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] )
+  [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
+  [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] )
   to:main::@10
 main::@10: scope:[main]  from main::@5
-  [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
-  [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
+  [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
+  [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] )
   to:main::@11
 main::@11: scope:[main]  from main::@10
-  [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] )
+  [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] )
   to:main::@6
 main::@6: scope:[main]  from main::@10 main::@11
-  [18] (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
-  [18] (byte) main::c#2 ← phi( main::@10/(byte) main::c#0 main::@11/(byte) main::c#1 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
-  [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] )
-  [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] )
+  [17] (byte*) main::nxt#4 ← phi( main::@10/(byte*) main::nxt#9 main::@11/(const byte*) TEXT#0 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
+  [17] (byte) main::c#2 ← phi( main::@10/(byte) main::c#0 main::@11/(byte) main::c#1 ) [ main::c#2 main::nxt#4 ] ( main:0 [ main::c#2 main::nxt#4 ] )
+  [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] )
+  [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] )
   to:main::@4
 main::@4: scope:[main]  from main::@6 main::@8
-  [21] (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [21] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] )
-  [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
-  [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [20] (byte*) main::nxt#10 ← phi( main::@6/(byte*) main::nxt#1 main::@8/(byte*) main::nxt#9 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [20] (byte) main::scroll#10 ← phi( main::@6/(byte) 7 main::@8/(byte) main::scroll#1 ) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
+  [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] )
   to:main::@return
 main::@return: scope:[main]  from main::@4
-  [26] return  [ ] ( main:0 [ ] )
+  [24] return  [ ] ( main:0 [ ] )
   to:@return
 fillscreen: scope:[fillscreen]  from main
-  [27] phi() [ ] ( main:0::fillscreen:2 [ ] )
+  [25] phi() [ ] ( main:0::fillscreen:2 [ ] )
   to:fillscreen::@1
 fillscreen::@1: scope:[fillscreen]  from fillscreen fillscreen::@1
-  [28] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@1/(byte*) fillscreen::cursor#1 ) [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
-  [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
-  [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
-  [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
+  [26] (byte*) fillscreen::cursor#2 ← phi( fillscreen/(const byte*) SCREEN#0 fillscreen::@1/(byte*) fillscreen::cursor#1 ) [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
+  [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] )
+  [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
+  [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] )
   to:fillscreen::@return
 fillscreen::@return: scope:[fillscreen]  from fillscreen::@1
-  [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  [30] return  [ ] ( main:0::fillscreen:2 [ ] )
   to:@return
 
 DOMINATORS
@@ -3400,9 +3338,7 @@ VARIABLE REGISTER WEIGHTS
 (byte) fillscreen::fill
 (byte*) fillscreen::screen
 (void()) main()
-(byte~) main::$12 22.0
-(byte~) main::$4 22.0
-(byte~) main::$8 202.0
+(byte~) main::$7 202.0
 (byte) main::c
 (byte) main::c#0 16.5
 (byte) main::c#1 22.0
@@ -3413,13 +3349,13 @@ VARIABLE REGISTER WEIGHTS
 (byte[]) main::line
 (byte*) main::nxt
 (byte*) main::nxt#1 22.0
-(byte*) main::nxt#10 6.6000000000000005
+(byte*) main::nxt#10 8.25
 (byte*) main::nxt#4 11.0
-(byte*) main::nxt#9 2.357142857142857
+(byte*) main::nxt#9 2.5384615384615383
 (byte) main::scroll
 (byte) main::scroll#1 16.5
-(byte) main::scroll#10 6.6000000000000005
-(byte) main::scroll#7 4.4
+(byte) main::scroll#10 8.25
+(byte) main::scroll#7 5.5
 
 Initial phi equivalence classes
 [ main::scroll#7 main::scroll#10 main::scroll#1 ]
@@ -3427,26 +3363,20 @@ Initial phi equivalence classes
 [ main::c#2 main::c#0 main::c#1 ]
 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ]
 [ fillscreen::cursor#2 fillscreen::cursor#1 ]
-Added variable main::$4 to zero page equivalence class [ main::$4 ]
-Added variable main::$8 to zero page equivalence class [ main::$8 ]
-Added variable main::$12 to zero page equivalence class [ main::$12 ]
+Added variable main::$7 to zero page equivalence class [ main::$7 ]
 Complete equivalence classes
 [ main::scroll#7 main::scroll#10 main::scroll#1 ]
 [ main::i#2 main::i#1 ]
 [ main::c#2 main::c#0 main::c#1 ]
 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ]
 [ fillscreen::cursor#2 fillscreen::cursor#1 ]
-[ main::$4 ]
-[ main::$8 ]
-[ main::$12 ]
+[ main::$7 ]
 Allocated zp ZP_BYTE:2 [ main::scroll#7 main::scroll#10 main::scroll#1 ]
 Allocated zp ZP_BYTE:3 [ main::i#2 main::i#1 ]
 Allocated zp ZP_BYTE:4 [ main::c#2 main::c#0 main::c#1 ]
 Allocated zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ]
 Allocated zp ZP_PTR_BYTE:7 [ fillscreen::cursor#2 fillscreen::cursor#1 ]
-Allocated zp ZP_BYTE:9 [ main::$4 ]
-Allocated zp ZP_BYTE:10 [ main::$8 ]
-Allocated zp ZP_BYTE:11 [ main::$12 ]
+Allocated zp ZP_BYTE:9 [ main::$7 ]
 INITIAL ASM
 //SEG0 Basic Upstart
 .pc = $801 "Basic"
@@ -3473,15 +3403,13 @@ bend:
 //SEG7 main
 main: {
     .const line = SCREEN+$28
-    .label _4 = 9
-    .label _8 = $a
-    .label _12 = $b
+    .label _7 = 9
     .label scroll = 2
     .label i = 3
     .label c = 4
     .label nxt = 5
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
   fillscreen_from_main:
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
@@ -3519,148 +3447,136 @@ main: {
     jmp b8
   //SEG21 main::@8
   b8:
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- zpby1=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-    sta _4
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=zpby1 
-    lda _4
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- zpby1=_dec_zpby1 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- zpby1=_dec_zpby1 
     dec scroll
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- zpby1_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- zpby1_neq_coby1_then_la1 
     lda scroll
     cmp #$ff
     bne b4_from_b8
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
   b5_from_b8:
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- zpby1=coby1 
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- zpby1=coby1 
     lda #0
     sta i
     jmp b5
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
   b5_from_b5:
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
     jmp b5
-  //SEG30 main::@5
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- zpby1=cowo1_staridx_zpby2 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- zpby1=cowo1_staridx_zpby2 
     ldx i
     lda line+1,x
-    sta _8
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_zpby1=zpby2 
-    lda _8
+    sta _7
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_zpby1=zpby2 
+    lda _7
     ldx i
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- zpby1=_inc_zpby1 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- zpby1=_inc_zpby1 
     inc i
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- zpby1_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- zpby1_neq_coby1_then_la1 
     lda i
     cmp #$27
     bne b5_from_b5
     jmp b10
-  //SEG35 main::@10
+  //SEG34 main::@10
   b10:
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- zpby1=_star_zpptrby1 
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- zpby1=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     sta c
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- zpby1_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- zpby1_neq_coby1_then_la1 
     lda c
     cmp #'@'
     bne b6_from_b10
     jmp b11
-  //SEG38 main::@11
+  //SEG37 main::@11
   b11:
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- zpby1=_star_cowo1 
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- zpby1=_star_cowo1 
     lda TEXT
     sta c
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
   b6_from_b11:
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
     jmp b6
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
   b6_from_b10:
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
     jmp b6
-  //SEG46 main::@6
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=zpby1 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=zpby1 
     lda c
     sta line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
   b4_from_b6:
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- zpby1=coby1 
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- zpby1=coby1 
     lda #7
     sta scroll
     jmp b4
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
   b4_from_b8:
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
     jmp b4
-  //SEG55 main::@4
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=zpby1 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=zpby1 
     lda scroll
     sta SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- zpby1=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-    sta _12
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=zpby1 
-    lda _12
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2_from_b4
     jmp breturn
-  //SEG60 main::@return
+  //SEG58 main::@return
   breturn:
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 7
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
   b1_from_fillscreen:
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
     jmp b1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
   b1_from_b1:
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
     jmp b1
-  //SEG67 fillscreen::@1
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1_from_b1
@@ -3670,9 +3586,9 @@ fillscreen: {
     bcc b1_from_b1
   !:
     jmp breturn
-  //SEG71 fillscreen::@return
+  //SEG69 fillscreen::@return
   breturn:
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -3680,35 +3596,29 @@ REGISTER UPLIFT POTENTIAL REGISTERS
 Statement [4] if(*((const byte*) RASTER#0)!=(byte) 254) goto main::@2 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) always clobbers reg byte a 
 Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ main::scroll#7 main::scroll#10 main::scroll#1 ]
 Statement [5] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) always clobbers reg byte a 
-Statement [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) always clobbers reg byte a 
-Statement [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) always clobbers reg byte a reg byte y 
-Statement [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) always clobbers reg byte a 
-Statement [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) always clobbers reg byte a reg byte y 
-Statement [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) always clobbers reg byte a 
+Statement [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) always clobbers reg byte a reg byte y 
+Statement [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) always clobbers reg byte a reg byte y 
+Statement [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) always clobbers reg byte a 
 Statement [4] if(*((const byte*) RASTER#0)!=(byte) 254) goto main::@2 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) always clobbers reg byte a 
 Statement [5] if(*((const byte*) RASTER#0)!=(byte) 255) goto main::@3 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) always clobbers reg byte a 
-Statement [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) always clobbers reg byte a 
-Statement [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) always clobbers reg byte a reg byte y 
-Statement [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) always clobbers reg byte a 
-Statement [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) always clobbers reg byte a reg byte y 
-Statement [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) always clobbers reg byte a 
+Statement [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) always clobbers reg byte a reg byte y 
+Statement [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) always clobbers reg byte a reg byte y 
+Statement [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) always clobbers reg byte a 
 Potential registers zp ZP_BYTE:2 [ main::scroll#7 main::scroll#10 main::scroll#1 ] : zp ZP_BYTE:2 , reg byte x , reg byte y , 
 Potential registers zp ZP_BYTE:3 [ main::i#2 main::i#1 ] : zp ZP_BYTE:3 , reg byte a , reg byte x , reg byte y , 
 Potential registers zp ZP_BYTE:4 [ main::c#2 main::c#0 main::c#1 ] : zp ZP_BYTE:4 , reg byte a , reg byte x , reg byte y , 
 Potential registers zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ] : zp ZP_PTR_BYTE:5 , 
 Potential registers zp ZP_PTR_BYTE:7 [ fillscreen::cursor#2 fillscreen::cursor#1 ] : zp ZP_PTR_BYTE:7 , 
-Potential registers zp ZP_BYTE:9 [ main::$4 ] : zp ZP_BYTE:9 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:10 [ main::$8 ] : zp ZP_BYTE:10 , reg byte a , reg byte x , reg byte y , 
-Potential registers zp ZP_BYTE:11 [ main::$12 ] : zp ZP_BYTE:11 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:9 [ main::$7 ] : zp ZP_BYTE:9 , reg byte a , reg byte x , reg byte y , 
 
 REGISTER UPLIFT SCOPES
-Uplift Scope [main] 286.17: zp ZP_BYTE:3 [ main::i#2 main::i#1 ] 202: zp ZP_BYTE:10 [ main::$8 ] 71.5: zp ZP_BYTE:4 [ main::c#2 main::c#0 main::c#1 ] 41.96: zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ] 27.5: zp ZP_BYTE:2 [ main::scroll#7 main::scroll#10 main::scroll#1 ] 22: zp ZP_BYTE:9 [ main::$4 ] 22: zp ZP_BYTE:11 [ main::$12 ] 
+Uplift Scope [main] 286.17: zp ZP_BYTE:3 [ main::i#2 main::i#1 ] 202: zp ZP_BYTE:9 [ main::$7 ] 71.5: zp ZP_BYTE:4 [ main::c#2 main::c#0 main::c#1 ] 43.79: zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ] 30.25: zp ZP_BYTE:2 [ main::scroll#7 main::scroll#10 main::scroll#1 ] 
 Uplift Scope [fillscreen] 33: zp ZP_PTR_BYTE:7 [ fillscreen::cursor#2 fillscreen::cursor#1 ] 
 Uplift Scope [] 
 
-Uplifting [main] best 8767 combination reg byte x [ main::i#2 main::i#1 ] reg byte a [ main::$8 ] reg byte x [ main::c#2 main::c#0 main::c#1 ] zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ] reg byte x [ main::scroll#7 main::scroll#10 main::scroll#1 ] reg byte a [ main::$4 ] reg byte a [ main::$12 ] 
-Uplifting [fillscreen] best 8767 combination zp ZP_PTR_BYTE:7 [ fillscreen::cursor#2 fillscreen::cursor#1 ] 
-Uplifting [] best 8767 combination 
+Uplifting [main] best 8647 combination reg byte x [ main::i#2 main::i#1 ] reg byte a [ main::$7 ] reg byte x [ main::c#2 main::c#0 main::c#1 ] zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ] reg byte x [ main::scroll#7 main::scroll#10 main::scroll#1 ] 
+Uplifting [fillscreen] best 8647 combination zp ZP_PTR_BYTE:7 [ fillscreen::cursor#2 fillscreen::cursor#1 ] 
+Uplifting [] best 8647 combination 
 Coalescing zero page register [ zp ZP_PTR_BYTE:5 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 ] ] with [ zp ZP_PTR_BYTE:7 [ fillscreen::cursor#2 fillscreen::cursor#1 ] ]
 Allocated (was zp ZP_PTR_BYTE:5) zp ZP_PTR_BYTE:2 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 fillscreen::cursor#2 fillscreen::cursor#1 ]
 Removing instruction jmp b2
@@ -3751,7 +3661,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
   fillscreen_from_main:
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
@@ -3785,125 +3695,117 @@ main: {
     bne b3
   //SEG21 main::@8
   b8:
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4_from_b8
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
   b5_from_b8:
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
     jmp b5
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
   b5_from_b5:
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5_from_b5
-  //SEG35 main::@10
+  //SEG34 main::@10
   b10:
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6_from_b10
-  //SEG38 main::@11
+  //SEG37 main::@11
   b11:
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
   b6_from_b11:
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
     jmp b6
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
   b6_from_b10:
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
   b4_from_b6:
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
     jmp b4
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
   b4_from_b8:
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2_from_b4
-  //SEG60 main::@return
+  //SEG58 main::@return
   breturn:
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
   b1_from_fillscreen:
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
     jmp b1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
   b1_from_b1:
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1_from_b1
@@ -3912,9 +3814,9 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1_from_b1
   !:
-  //SEG71 fillscreen::@return
+  //SEG69 fillscreen::@return
   breturn:
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -3956,7 +3858,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
   fillscreen_from_main:
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
@@ -3989,121 +3891,113 @@ main: {
     bne b3
   //SEG21 main::@8
   b8:
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
   b5_from_b8:
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
     jmp b5
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5
-  //SEG35 main::@10
+  //SEG34 main::@10
   b10:
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6
-  //SEG38 main::@11
+  //SEG37 main::@11
   b11:
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
   b6_from_b11:
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
     jmp b6
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
   b4_from_b6:
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
     jmp b4
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2
-  //SEG60 main::@return
+  //SEG58 main::@return
   breturn:
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
   b1_from_fillscreen:
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
     jmp b1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1
@@ -4112,9 +4006,9 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1
   !:
-  //SEG71 fillscreen::@return
+  //SEG69 fillscreen::@return
   breturn:
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -4154,7 +4048,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
   //SEG11 [3] phi (byte*) main::nxt#9 = (const byte*) TEXT#0 [phi:main->main::@2#0] -- zpptrby1=cowo1 
@@ -4184,114 +4078,106 @@ main: {
     cmp #$ff
     bne b3
   //SEG21 main::@8
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
     jmp b5
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5
-  //SEG35 main::@10
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG34 main::@10
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6
-  //SEG38 main::@11
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG37 main::@11
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
     jmp b6
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
     jmp b4
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2
-  //SEG60 main::@return
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG58 main::@return
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
     jmp b1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1
@@ -4300,8 +4186,8 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1
   !:
-  //SEG71 fillscreen::@return
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG69 fillscreen::@return
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -4333,7 +4219,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
   //SEG11 [3] phi (byte*) main::nxt#9 = (const byte*) TEXT#0 [phi:main->main::@2#0] -- zpptrby1=cowo1 
@@ -4362,110 +4248,102 @@ main: {
     cmp #$ff
     bne b3
   //SEG21 main::@8
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5
-  //SEG35 main::@10
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG34 main::@10
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6
-  //SEG38 main::@11
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG37 main::@11
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2
-  //SEG60 main::@return
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG58 main::@return
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1
@@ -4474,8 +4352,8 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1
   !:
-  //SEG71 fillscreen::@return
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG69 fillscreen::@return
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -4504,7 +4382,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
   //SEG11 [3] phi (byte*) main::nxt#9 = (const byte*) TEXT#0 [phi:main->main::@2#0] -- zpptrby1=cowo1 
@@ -4532,110 +4410,102 @@ main: {
     cmp #$ff
     bne b3
   //SEG21 main::@8
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5
-  //SEG35 main::@10
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG34 main::@10
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6
-  //SEG38 main::@11
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG37 main::@11
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2
-  //SEG60 main::@return
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG58 main::@return
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1
@@ -4644,8 +4514,8 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1
   !:
-  //SEG71 fillscreen::@return
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG69 fillscreen::@return
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -4673,7 +4543,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
   //SEG11 [3] phi (byte*) main::nxt#9 = (const byte*) TEXT#0 [phi:main->main::@2#0] -- zpptrby1=cowo1 
@@ -4700,110 +4570,102 @@ main: {
     cmp #$ff
     bne b3
   //SEG21 main::@8
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5
-  //SEG35 main::@10
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG34 main::@10
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6
-  //SEG38 main::@11
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG37 main::@11
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2
-  //SEG60 main::@return
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG58 main::@return
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1
@@ -4812,8 +4674,8 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1
   !:
-  //SEG71 fillscreen::@return
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG69 fillscreen::@return
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
@@ -4841,9 +4703,7 @@ FINAL SYMBOL TABLE
 (const byte) fillscreen::fill#0 fill = (byte) 32
 (byte*) fillscreen::screen
 (void()) main()
-(byte~) main::$12 reg byte a 22.0
-(byte~) main::$4 reg byte a 22.0
-(byte~) main::$8 reg byte a 202.0
+(byte~) main::$7 reg byte a 202.0
 (label) main::@10
 (label) main::@11
 (label) main::@2
@@ -4864,21 +4724,19 @@ FINAL SYMBOL TABLE
 (const byte[]) main::line#0 line = (const byte*) SCREEN#0+(byte) 40
 (byte*) main::nxt
 (byte*) main::nxt#1 nxt zp ZP_PTR_BYTE:2 22.0
-(byte*) main::nxt#10 nxt zp ZP_PTR_BYTE:2 6.6000000000000005
+(byte*) main::nxt#10 nxt zp ZP_PTR_BYTE:2 8.25
 (byte*) main::nxt#4 nxt zp ZP_PTR_BYTE:2 11.0
-(byte*) main::nxt#9 nxt zp ZP_PTR_BYTE:2 2.357142857142857
+(byte*) main::nxt#9 nxt zp ZP_PTR_BYTE:2 2.5384615384615383
 (byte) main::scroll
 (byte) main::scroll#1 reg byte x 16.5
-(byte) main::scroll#10 reg byte x 6.6000000000000005
-(byte) main::scroll#7 reg byte x 4.4
+(byte) main::scroll#10 reg byte x 8.25
+(byte) main::scroll#7 reg byte x 5.5
 
 reg byte x [ main::scroll#7 main::scroll#10 main::scroll#1 ]
 reg byte x [ main::i#2 main::i#1 ]
 reg byte x [ main::c#2 main::c#0 main::c#1 ]
 zp ZP_PTR_BYTE:2 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 fillscreen::cursor#2 fillscreen::cursor#1 ]
-reg byte a [ main::$4 ]
-reg byte a [ main::$8 ]
-reg byte a [ main::$12 ]
+reg byte a [ main::$7 ]
 
 FINAL CODE
 //SEG0 Basic Upstart
@@ -4902,7 +4760,7 @@ main: {
     .const line = SCREEN+$28
     .label nxt = 2
   //SEG8 [2] call fillscreen param-assignment [ ] ( main:0 [ ] )
-  //SEG9 [27] phi from main to fillscreen [phi:main->fillscreen]
+  //SEG9 [25] phi from main to fillscreen [phi:main->fillscreen]
     jsr fillscreen
   //SEG10 [3] phi from main to main::@2 [phi:main->main::@2]
   //SEG11 [3] phi (byte*) main::nxt#9 = (const byte*) TEXT#0 [phi:main->main::@2#0] -- zpptrby1=cowo1 
@@ -4929,110 +4787,102 @@ main: {
     cmp #$ff
     bne b3
   //SEG21 main::@8
-  //SEG22 [6] (byte~) main::$4 ← *((const byte*) BGCOL#0) + (byte) 1 [ main::scroll#7 main::nxt#9 main::$4 ] ( main:0 [ main::scroll#7 main::nxt#9 main::$4 ] ) -- aby=_star_cowo1_plus_1 
-    lda BGCOL
-    clc
-    adc #1
-  //SEG23 [7] *((const byte*) BGCOL#0) ← (byte~) main::$4 [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG24 [8] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
+  //SEG22 [6] *((const byte*) BGCOL#0) ← ++ *((const byte*) BGCOL#0) [ main::scroll#7 main::nxt#9 ] ( main:0 [ main::scroll#7 main::nxt#9 ] ) -- _star_cowo1=_inc__star_cowo1 
+    inc BGCOL
+  //SEG23 [7] (byte) main::scroll#1 ← -- (byte) main::scroll#7 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby=_dec_xby 
     dex
-  //SEG25 [9] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG24 [8] if((byte) main::scroll#1!=(byte) 255) goto main::@4 [ main::nxt#9 main::scroll#1 ] ( main:0 [ main::nxt#9 main::scroll#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$ff
     bne b4
-  //SEG26 [10] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
-  //SEG27 [10] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
+  //SEG25 [9] phi from main::@8 to main::@5 [phi:main::@8->main::@5]
+  //SEG26 [9] phi (byte) main::i#2 = (byte) 0 [phi:main::@8->main::@5#0] -- xby=coby1 
     ldx #0
-  //SEG28 [10] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
-  //SEG29 [10] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
-  //SEG30 main::@5
+  //SEG27 [9] phi from main::@5 to main::@5 [phi:main::@5->main::@5]
+  //SEG28 [9] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@5->main::@5#0] -- register_copy 
+  //SEG29 main::@5
   b5:
-  //SEG31 [11] (byte~) main::$8 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$8 ] ( main:0 [ main::nxt#9 main::i#2 main::$8 ] ) -- aby=cowo1_staridx_xby 
+  //SEG30 [10] (byte~) main::$7 ← (const byte[]) main::line#0+(byte) 1 *idx (byte) main::i#2 [ main::nxt#9 main::i#2 main::$7 ] ( main:0 [ main::nxt#9 main::i#2 main::$7 ] ) -- aby=cowo1_staridx_xby 
     lda line+1,x
-  //SEG32 [12] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$8 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
+  //SEG31 [11] *((const byte[]) main::line#0 + (byte) main::i#2) ← (byte~) main::$7 [ main::nxt#9 main::i#2 ] ( main:0 [ main::nxt#9 main::i#2 ] ) -- cowo1_staridx_xby=aby 
     sta line,x
-  //SEG33 [13] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
+  //SEG32 [12] (byte) main::i#1 ← ++ (byte) main::i#2 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby=_inc_xby 
     inx
-  //SEG34 [14] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
+  //SEG33 [13] if((byte) main::i#1!=(byte) 39) goto main::@5 [ main::nxt#9 main::i#1 ] ( main:0 [ main::nxt#9 main::i#1 ] ) -- xby_neq_coby1_then_la1 
     cpx #$27
     bne b5
-  //SEG35 main::@10
-  //SEG36 [15] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
+  //SEG34 main::@10
+  //SEG35 [14] (byte) main::c#0 ← *((byte*) main::nxt#9) [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby=_star_zpptrby1 
     ldy #0
     lda (nxt),y
     tax
-  //SEG37 [16] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
+  //SEG36 [15] if((byte) main::c#0!=(byte) '@') goto main::@6 [ main::nxt#9 main::c#0 ] ( main:0 [ main::nxt#9 main::c#0 ] ) -- xby_neq_coby1_then_la1 
     cpx #'@'
     bne b6
-  //SEG38 main::@11
-  //SEG39 [17] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
+  //SEG37 main::@11
+  //SEG38 [16] (byte) main::c#1 ← *((const byte*) TEXT#0) [ main::c#1 ] ( main:0 [ main::c#1 ] ) -- xby=_star_cowo1 
     ldx TEXT
-  //SEG40 [18] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
-  //SEG41 [18] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
+  //SEG39 [17] phi from main::@11 to main::@6 [phi:main::@11->main::@6]
+  //SEG40 [17] phi (byte*) main::nxt#4 = (const byte*) TEXT#0 [phi:main::@11->main::@6#0] -- zpptrby1=cowo1 
     lda #<TEXT
     sta nxt
     lda #>TEXT
     sta nxt+1
-  //SEG42 [18] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
-  //SEG43 [18] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
-  //SEG44 [18] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
-  //SEG45 [18] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
-  //SEG46 main::@6
+  //SEG41 [17] phi (byte) main::c#2 = (byte) main::c#1 [phi:main::@11->main::@6#1] -- register_copy 
+  //SEG42 [17] phi from main::@10 to main::@6 [phi:main::@10->main::@6]
+  //SEG43 [17] phi (byte*) main::nxt#4 = (byte*) main::nxt#9 [phi:main::@10->main::@6#0] -- register_copy 
+  //SEG44 [17] phi (byte) main::c#2 = (byte) main::c#0 [phi:main::@10->main::@6#1] -- register_copy 
+  //SEG45 main::@6
   b6:
-  //SEG47 [19] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
+  //SEG46 [18] *((const byte[]) main::line#0+(byte) 39) ← (byte) main::c#2 [ main::nxt#4 ] ( main:0 [ main::nxt#4 ] ) -- _star_cowo1=xby 
     stx line+$27
-  //SEG48 [20] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG47 [19] (byte*) main::nxt#1 ← ++ (byte*) main::nxt#4 [ main::nxt#1 ] ( main:0 [ main::nxt#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc nxt
     bne !+
     inc nxt+1
   !:
-  //SEG49 [21] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
-  //SEG50 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
-  //SEG51 [21] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
+  //SEG48 [20] phi from main::@6 to main::@4 [phi:main::@6->main::@4]
+  //SEG49 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#1 [phi:main::@6->main::@4#0] -- register_copy 
+  //SEG50 [20] phi (byte) main::scroll#10 = (byte) 7 [phi:main::@6->main::@4#1] -- xby=coby1 
     ldx #7
-  //SEG52 [21] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
-  //SEG53 [21] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
-  //SEG54 [21] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
-  //SEG55 main::@4
+  //SEG51 [20] phi from main::@8 to main::@4 [phi:main::@8->main::@4]
+  //SEG52 [20] phi (byte*) main::nxt#10 = (byte*) main::nxt#9 [phi:main::@8->main::@4#0] -- register_copy 
+  //SEG53 [20] phi (byte) main::scroll#10 = (byte) main::scroll#1 [phi:main::@8->main::@4#1] -- register_copy 
+  //SEG54 main::@4
   b4:
-  //SEG56 [22] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
+  //SEG55 [21] *((const byte*) SCROLL#0) ← (byte) main::scroll#10 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=xby 
     stx SCROLL
-  //SEG57 [23] (byte~) main::$12 ← *((const byte*) BGCOL#0) - (byte) 1 [ main::scroll#10 main::nxt#10 main::$12 ] ( main:0 [ main::scroll#10 main::nxt#10 main::$12 ] ) -- aby=_star_cowo1_minus_1 
-    lda BGCOL
-    sec
-    sbc #1
-  //SEG58 [24] *((const byte*) BGCOL#0) ← (byte~) main::$12 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=aby 
-    sta BGCOL
-  //SEG59 [25] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
+  //SEG56 [22] *((const byte*) BGCOL#0) ← -- *((const byte*) BGCOL#0) [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- _star_cowo1=_dec__star_cowo1 
+    dec BGCOL
+  //SEG57 [23] if(true) goto main::@2 [ main::scroll#10 main::nxt#10 ] ( main:0 [ main::scroll#10 main::nxt#10 ] ) -- true_then_la1 
     jmp b2
-  //SEG60 main::@return
-  //SEG61 [26] return  [ ] ( main:0 [ ] )
+  //SEG58 main::@return
+  //SEG59 [24] return  [ ] ( main:0 [ ] )
     rts
 }
-//SEG62 fillscreen
+//SEG60 fillscreen
 fillscreen: {
     .const fill = $20
     .label cursor = 2
-  //SEG63 [28] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
-  //SEG64 [28] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
+  //SEG61 [26] phi from fillscreen to fillscreen::@1 [phi:fillscreen->fillscreen::@1]
+  //SEG62 [26] phi (byte*) fillscreen::cursor#2 = (const byte*) SCREEN#0 [phi:fillscreen->fillscreen::@1#0] -- zpptrby1=cowo1 
     lda #<SCREEN
     sta cursor
     lda #>SCREEN
     sta cursor+1
-  //SEG65 [28] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
-  //SEG66 [28] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
-  //SEG67 fillscreen::@1
+  //SEG63 [26] phi from fillscreen::@1 to fillscreen::@1 [phi:fillscreen::@1->fillscreen::@1]
+  //SEG64 [26] phi (byte*) fillscreen::cursor#2 = (byte*) fillscreen::cursor#1 [phi:fillscreen::@1->fillscreen::@1#0] -- register_copy 
+  //SEG65 fillscreen::@1
   b1:
-  //SEG68 [29] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
+  //SEG66 [27] *((byte*) fillscreen::cursor#2) ← (const byte) fillscreen::fill#0 [ fillscreen::cursor#2 ] ( main:0::fillscreen:2 [ fillscreen::cursor#2 ] ) -- _star_zpptrby1=coby1 
     ldy #0
     lda #fill
     sta (cursor),y
-  //SEG69 [30] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
+  //SEG67 [28] (byte*) fillscreen::cursor#1 ← ++ (byte*) fillscreen::cursor#2 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1=_inc_zpptrby1 
     inc cursor
     bne !+
     inc cursor+1
   !:
-  //SEG70 [31] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
+  //SEG68 [29] if((byte*) fillscreen::cursor#1<(const byte*) SCREEN#0+(word) 1000) goto fillscreen::@1 [ fillscreen::cursor#1 ] ( main:0::fillscreen:2 [ fillscreen::cursor#1 ] ) -- zpptrby1_lt_cowo1_then_la1 
     lda cursor+1
     cmp #>SCREEN+$3e8
     bcc b1
@@ -5041,8 +4891,8 @@ fillscreen: {
     cmp #<SCREEN+$3e8
     bcc b1
   !:
-  //SEG71 fillscreen::@return
-  //SEG72 [32] return  [ ] ( main:0::fillscreen:2 [ ] )
+  //SEG69 fillscreen::@return
+  //SEG70 [30] return  [ ] ( main:0::fillscreen:2 [ ] )
     rts
 }
 
diff --git a/src/main/java/dk/camelot64/kickc/test/ref/scroll.sym b/src/main/java/dk/camelot64/kickc/test/ref/scroll.sym
index 47126ee8f..8ffd808a3 100644
--- a/src/main/java/dk/camelot64/kickc/test/ref/scroll.sym
+++ b/src/main/java/dk/camelot64/kickc/test/ref/scroll.sym
@@ -21,9 +21,7 @@
 (const byte) fillscreen::fill#0 fill = (byte) 32
 (byte*) fillscreen::screen
 (void()) main()
-(byte~) main::$12 reg byte a 22.0
-(byte~) main::$4 reg byte a 22.0
-(byte~) main::$8 reg byte a 202.0
+(byte~) main::$7 reg byte a 202.0
 (label) main::@10
 (label) main::@11
 (label) main::@2
@@ -44,18 +42,16 @@
 (const byte[]) main::line#0 line = (const byte*) SCREEN#0+(byte) 40
 (byte*) main::nxt
 (byte*) main::nxt#1 nxt zp ZP_PTR_BYTE:2 22.0
-(byte*) main::nxt#10 nxt zp ZP_PTR_BYTE:2 6.6000000000000005
+(byte*) main::nxt#10 nxt zp ZP_PTR_BYTE:2 8.25
 (byte*) main::nxt#4 nxt zp ZP_PTR_BYTE:2 11.0
-(byte*) main::nxt#9 nxt zp ZP_PTR_BYTE:2 2.357142857142857
+(byte*) main::nxt#9 nxt zp ZP_PTR_BYTE:2 2.5384615384615383
 (byte) main::scroll
 (byte) main::scroll#1 reg byte x 16.5
-(byte) main::scroll#10 reg byte x 6.6000000000000005
-(byte) main::scroll#7 reg byte x 4.4
+(byte) main::scroll#10 reg byte x 8.25
+(byte) main::scroll#7 reg byte x 5.5
 
 reg byte x [ main::scroll#7 main::scroll#10 main::scroll#1 ]
 reg byte x [ main::i#2 main::i#1 ]
 reg byte x [ main::c#2 main::c#0 main::c#1 ]
 zp ZP_PTR_BYTE:2 [ main::nxt#4 main::nxt#9 main::nxt#10 main::nxt#1 fillscreen::cursor#2 fillscreen::cursor#1 ]
-reg byte a [ main::$4 ]
-reg byte a [ main::$8 ]
-reg byte a [ main::$12 ]
+reg byte a [ main::$7 ]
diff --git a/src/main/java/dk/camelot64/kickc/test/scroll.kc b/src/main/java/dk/camelot64/kickc/test/scroll.kc
index e7774df29..659b7e033 100644
--- a/src/main/java/dk/camelot64/kickc/test/scroll.kc
+++ b/src/main/java/dk/camelot64/kickc/test/scroll.kc
@@ -13,7 +13,7 @@ void main() {
         // Wait for raster
         do {} while(*RASTER!=$fe);
         do {} while(*RASTER!=$ff);
-        *BGCOL = *BGCOL+1;
+        (*BGCOL)++;
         // Soft scroll
         if(--scroll==$ff) {
             scroll = 7;
@@ -31,7 +31,7 @@ void main() {
             nxt++;
         }
         *SCROLL = scroll;
-        *BGCOL = *BGCOL-1;
+        (*BGCOL)--;
     } while(true);
 }