From 5805947c938add776cd75f67a6c0876575a56bee Mon Sep 17 00:00:00 2001
From: Michaelangel007 <michaelangel007@sharedcraft.com>
Date: Mon, 24 Jul 2017 14:41:52 -0700
Subject: [PATCH] Shaved off anothe 4 bytes, 660 now. Thanks Mike B.

---
 README.md   |   2 +-
 linuxlogo   | Bin 664 -> 660 bytes
 linuxlogo.s |  19 +++++++++++--------
 ll_6502.dsk | Bin 143360 -> 143360 bytes
 4 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index 10ed105..1aa7fb7 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 
 Optimized Linux Logo in 6502 assembly language for size.
 
-Size: 664 ($298) bytes
+Size: 660 ($294) bytes
 
 
 # Screenshots
diff --git a/linuxlogo b/linuxlogo
index 8255ecd8712e8c654be3f05b00befede2273d888..aa427cff23c325b11b3735dc40b14a36cb2886e8 100644
GIT binary patch
delta 168
zcmV;Z09XH*1(XGlAr`O-jIj!hvI?o7jeiQFwxG3+fC`L(kvAqfkP42G3XGBp&>XG6
z`|t+I;Lzak45{OdfC{a@`^g2+1)>2U(Fu)#z^Mm?C7=L={e=0g!U~1{xx<l{CIL#3
zz7_$pk<~0ZL+J;o=!W^F`yJ3fozOp+;3$wV<|U;iAi?{kDM=)SDWV6UC%Mo+ktmAL
W1DVi2h!FA^r739yg(<T?0a*cNU{10C

delta 172
zcmV;d08{^z1(*epAr`a>jI|1lwhF1Bje`oJwxG3+gbIv>kvAqflnRcO3XGNt&>XG6
z`|t+I;Lzak45{OdgbJ;{`^g2+1)>2U(Fu)#z^Mm?C7=L={e=0g#tMc0xyO;0CIL>7
zz7_$tk<~0dN9hNs=!W^F`yJ3fozOp+;3$wZ<|U;iAi?{kD1|1aDM=)SC!z<SC%Mo+
aktT}J1DVi2h!FA^r6*|wg(tH+0a*dTVNhZK

diff --git a/linuxlogo.s b/linuxlogo.s
index bf83814..a731264 100644
--- a/linuxlogo.s
+++ b/linuxlogo.s
@@ -5,7 +5,9 @@
 ; Zero Page ROM vars
 zCursorX    = $24 ; CH
 zCursorY    = $25 ; CH
-zHgrPtr     = $26 ; GBASL = Dst Pixel Addr
+
+; NOTE: We *don't* use this, instead we *re-use* zTxtPtr
+;zHgrPtr    = $26 ; GBASL = Dst Pixel Addr
 zTxtPtr     = $28 ; BASL  = Dst
 
 zDstOffset  = $F9 ; dst
@@ -306,12 +308,13 @@ MakeShiftMask
         lda zCursorY
         jsr BASCALC
 
-        lda zTxtPtr+0   ; every 8 HGR scanline address
-        sta zHgrPtr+0   ; is exactly same as Text low byte
-
+; Yes, this is evil ...
+; Instead of copying zTxtPtr over to zHgrPtr
+; We re-use it by forcing it to be a HGR address!
+; This *is* safe BECAUSE we call JSR BASCALC _before_ we do any text printing.
         lda zTxtPtr+1   ; every 8 HGR scanline address
         eor #$24        ; is Text Page $04 + $1C = HGR Page $20; CLC, ADC #$1C
-        sta zHgrPtr+1   ; but we can optimize for HGR page 1 via EOR #$24 -- Thanks Mike B.!
+        sta zTxtPtr+1   ; but we can optimize for HGR page 1 via EOR #$24 -- Thanks Mike B.!
 
 ; ------------------------------------------------------------------------
 ; Copy unpacked buffer to 8 HGR scanlines
@@ -321,7 +324,7 @@ Draw8Rows
         ldy #39             ; 280/7 = 40 bytes/scanline
 CopyScanLine
         lda UnpackAddr,Y      
-        sta (zHgrPtr),Y
+        sta (zTxtPtr),Y
 
         txa                 ; Clear source on last scanline copy
         bne CopyNextByte
@@ -331,9 +334,9 @@ CopyNextByte
         bpl CopyScanLine
 
         clc                 ; y = y+1
-        lda zHgrPtr+1       ; HGR addr_y+1 = addr_y + $0400
+        lda zTxtPtr+1       ; HGR addr_y+1 = addr_y + $0400
         adc #$04
-        sta zHgrPtr+1
+        sta zTxtPtr+1
 
         stx zDstOffset      ; X=0 last loop iteration
         txa                 ; A=0 zDstShift
diff --git a/ll_6502.dsk b/ll_6502.dsk
index 43b6395eab99d096db2fdb3c386eae51cb8f78aa..2a5f52e200a70471aae21592d28025affd16bd12 100644
GIT binary patch
delta 203
zcmV;+05t!A;0S==2!ON!0cw{nTmjOP5DG1pYXJp1L+J;o=!W^F`yJ3fozOp+;3$wV
z<|U;iAi?{kDM=)SDWV6UC%Mo+ktmAL1DVi2h!FA^r739yg(;UqYXQ9n|9|oS011?r
z18e~z7O)D8u?mf{3aOxte+r_uptX*G3XFl5K3)MP8ITH&kqV5G3eX&_!29q9$>7l7
z@C>QrjewVWYylev!U~1{xx<&6Yyl=1N(zxE=*Yk*(Dmjer6tK1(CEe`sjHo`x7lm~
FC&N`aT&(~A

delta 202
zcmV;*05$)B;0S==2!ON!0crz(@&A@;0sNM00R=us=?AFjhWVxY9ne3W&_9^qD3CPf
zC8Z@G!TY5sg(jsbNhF0Qq6eTSxzIn6CW_Dlnb1Fo5b_wMCuszQCzn5K0lfnN37D4y
zYylz`v<i&13XQf3si2L63Zk~4wT^@ejD?pzUI8W<lnRcO3XGNt&>XG6`|t+I;Lzak
z45{OdgqM130UHL!3Wff;$CsOI0VWtu3Xv%2$iOJj_2wm|CCL}i=*A_ftDUyD*=zwP
E!>-v}kN^Mx