Size 701 bytes

2017-07-17 02:01:43 -07:00 · 2017-07-17 02:01:43 -07:00 · 7f7854dbcf
parent 9fcfaea8d8
commit 7f7854dbcf
4 changed files with 6 additions and 5 deletions
--- a/README.md
+++ b/README.md
@ -8,7 +8,7 @@

 Linux Logo in 6502 assembly language.

-Size: 703 ($2BF) bytes
+Size: 701 ($2BD) bytes

 Features:

@ -40,6 +40,7 @@ __@@____@@_AA@_@_@@_____@@__@@@___@@@____@@___@@___BBBBBB@_____@BBBBBB
 ```

 See: [ascii2hgr2bit](ascii2hgr2bit.c) for packing ASCII to 2 bits/char.
+NOTE: PackedLen isn't needed if full 40 bytes HGR width is unpacked to.

 Inspired from non-optimized version. Size: 1,573 ($625) bytes
 * https://github.com/deater/linux_logo
--- a/linuxlogo.s
+++ b/linuxlogo.s
@ -91,6 +91,7 @@ apple_ii_normal
 set_apple_ii
        sta ModType         ; erase last 'e' in 'Apple IIe'

+        lda #" "            ; $A0
        sta CpuType         ; '_6502'
        lda #"6"
        sta CpuType+1
@ -187,8 +188,7 @@ CheckFetch
        cmp #8              ; have 8 input bits?
        bne GetBit
        iny                 ; src++
-        cpy PackedLen
-        bcc NextSrcShift    ; C=0 -> STZ zSrcShift
+        bne NextSrcShift
 UnpackDone


--- a/ll_6502.dsk
+++ b/ll_6502.dsk
--- a/packedlogo.s
+++ b/packedlogo.s
@ -1,5 +1,5 @@
-PackedLen
-        dfb $D2
+;PackedLen
+;        dfb $D2
 PackedBits
        ;     0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34 byte
        ;     0  16  32  48  64  80  96 112 128 144 160 176 192 208 224 240 256 272   8  24  40  56  72  88 104 120 136 152 168 184 200 216 232 248 264 px