diff options
Diffstat (limited to 'hacks/images/m6502/byterun.asm')
| -rw-r--r-- | hacks/images/m6502/byterun.asm | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/hacks/images/m6502/byterun.asm b/hacks/images/m6502/byterun.asm new file mode 100644 index 0000000..848b5c9 --- /dev/null +++ b/hacks/images/m6502/byterun.asm @@ -0,0 +1,100 @@ +; testing byterun compression + +start: + lda #<logo + sta $0 + lda #>logo + sta $1 + lda #$00 + sta $2 + lda #$02 + sta $3 + +decrunchLoop: + lda $3 + cmp #$6 + bne moreWork + rts +moreWork: + ldy #0 + lda ($0),y + cmp #$ff + bne notCrunched + iny + lda ($0),y ; repeat # + sta $4 + iny + lda ($0),y ; color + ldy $4 +drawLoop: + ldx #0 + sta ($2,x) + jsr nextPixel + dey + bne drawLoop + jsr getNextByte + jsr getNextByte + jmp decrunchLoop +notCrunched: + ldx #0 + sta ($2,x) + jsr nextPixel + jsr getNextByte + jmp decrunchLoop + +getNextByte: + inc $0 + lda $0 + cmp #$00 + bne notHi + inc $1 +notHi: + rts + +nextPixel: + inc $2 + ldx $2 + cpx #$00 + bne notNextLine + inc $3 +notNextLine: + rts + + +logo: + dcb $ff,43,1,$f,$f,$f,$c,$f,$f,$f,$ff,24,1,$c,$f,$c,0 + dcb $c,$f,$c,$ff,24,1,0,$f,$c,0,$c,$f,$c,$ff,24,1 + dcb $c,$f,$c,0,$c,$f,$c,$ff,24,1,0,$f,$c,0,$c,$f,$c + dcb $ff,24,1,$c,$f,0,0,$c,$f,$c,$ff,24,1,0,$f,$c,0 + dcb $c,$f,$c,$ff,24,1,0,$f,$c,0,$c,$f,0,$ff,24,1 + dcb 0,$f,$c,0,$c,$f,0,$ff,23,1,$f,0,$f,$c,0,$c,$f,0,$f + dcb $ff,22,1,$c,0,1,$c,0,$c,$f,0,$c,$ff,21,1 + dcb $f,0,0,1,0,0,$c,1,0,0,$ff,21,1,$c,0,$c,1,$c,0 + dcb $c,1,$c,0,$c,$ff,19,1,$f,0,0,$f,1,$c,0 + dcb $c,1,$f,0,0,$f,$ff,17,1,$f,0,0,0,1,1,$c,0 + dcb $c,1,1,0,0,0,$ff,16,1,$f,0,0,0,$f,1,1,0,0 + dcb $c,1,1,$f,0,0,0,$f,$ff,13,1 + dcb $c,0,0,0,$c,1,1,1,$c,0,$c,1,1,1,$c,0,0,0,$c + dcb $ff,10,1,$c,0,0,0,0,$c,1,1,1,1,0,0 + dcb $c,1,1,1,1,0,0,0,0,0,$c,$ff,8,1 + dcb 0,0,0,0,$c,1,1,1,1,1,0,0 + dcb $c,1,1,1,1,1,$c,0,0,0,0,1,1,1,1,1 + dcb 1,1,1,1,0,0,$c,1,1,1,1,1,1,1,$c,0 + dcb $c,1,1,1,1,1,1,$f,$c,0,0,$ff,18,1,$f + dcb $ff,53,1,0,$f,1,0,0,0,0,0,$f,1,$c + dcb $c,1,1,1,$c,0,0,0,1,1,0,$f,$f,1,1,1 + dcb 1,1,1,1,$c,0,0,1,1,1,0,$f,1,1,$f,0 + dcb 0,$f,1,1,0,$f,1,$c,$c,1,0,$f,1,1,1,1 + dcb 1,1,1,1,0,$f,0,$f,1,1,0,$f,1,1,$f,$c + dcb $c,$c,1,1,0,1,1,$f,0,1,0,$f,1,1,1,1 + dcb 1,1,1,1,0,1,$c,$f,1,1,$c,$f,1,1,0,$f + dcb $f,0,1,1,0,$f,$f,0,$f,1,0,$f,1,1,1,1 + dcb 1,1,1,$c,0,$c,0,0,1,1,0,$f,1,1,0,$c + dcb $c,0,$f,1,0,$f,0,$f,1,1,0,$f,1,1,1,1 + dcb 1,1,1,0,$c,$f,$f,0,$f,1,$c,$f,1,$c,$c,$f + dcb $f,$c,$c,1,0,1,$f,$c,1,1,0,$f,1,1,1,1 + dcb 1,1,$f,0,1,1,1,$c,$c,1,0,$f,1,0,$f,1 + dcb 1,$f,0,1,0,$f,1,0,$f,1,0,$f,$ff,16,1 + dcb $f,$ff,5,1,$f,1,1,1,$f,$ff,38,1 + + |