diff --git a/src/dk/camelot64/kickc/asm/fragment/ptr_cowo1_yby=zpby1.asm b/src/dk/camelot64/kickc/asm/fragment/ptr_cowo1_yby=zpby1.asm
new file mode 100644
index 000000000..3c8089e70
--- /dev/null
+++ b/src/dk/camelot64/kickc/asm/fragment/ptr_cowo1_yby=zpby1.asm
@@ -0,0 +1,2 @@
+lda {zpby1}
+sta {cowo1},y
\ No newline at end of file
diff --git a/src/dk/camelot64/kickc/asm/fragment/yby=_dec_yby.asm b/src/dk/camelot64/kickc/asm/fragment/yby=_dec_yby.asm
new file mode 100644
index 000000000..37aac7c98
--- /dev/null
+++ b/src/dk/camelot64/kickc/asm/fragment/yby=_dec_yby.asm
@@ -0,0 +1 @@
+dey
\ No newline at end of file
diff --git a/src/dk/camelot64/kickc/test/flipper-rex2.kc b/src/dk/camelot64/kickc/test/flipper-rex2.kc
index a7c62dd96..ea351f2cf 100644
--- a/src/dk/camelot64/kickc/test/flipper-rex2.kc
+++ b/src/dk/camelot64/kickc/test/flipper-rex2.kc
@@ -34,12 +34,12 @@ void flip() {
       byte c = 16;
       do {
          buffer2[dstIdx] = buffer[srcIdx];
-         srcIdx = srcIdx+1;
+         srcIdx++;
          dstIdx = dstIdx+16;
          c--;
       } while(c!=0)
-      dstIdx = dstIdx-1;
-      r=r-1;
+      dstIdx--;
+      r--;
      } while(r!=0)
    byte i=0;
    do {