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megdemo: have simple case working
This commit is contained in:
Vince Weaver
parent
452b891f55
commit
1a40b7de36
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@ -2,6 +2,8 @@ include ../Makefile.inc
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DOS33 = ../dos33fs-utils/dos33
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B2D = ../bmp2dhr/b2d
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PNG_TO_40x96 = ../gr-utils/png_to_40x96
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all: megademo.dsk
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@ -19,12 +21,18 @@ MEGADEMO: megademo.o
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megademo.o: megademo.s \
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zp.inc hardware.inc \
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c64_opener.s c64.img.lz4
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c64_opener.s c64.img.lz4 \
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falling_apple.s apple_40_96.inc
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ca65 -o megademo.o megademo.s -l megademo.lst
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####
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apple_40_96.inc: ./images/apple_40_96.png
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$(PNG_TO_40x96) asm ./images/apple_40_96.png apple > apple_40_96.inc
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####
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c64.img.lz4: c64.img
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lz4 -f -16 c64.img
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177
megademo/apple_40_96.inc
Normal file
177
megademo/apple_40_96.inc
Normal file
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@ -0,0 +1,177 @@
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apple_low: .byte $28 ; ysize=48
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.byte $A8,$FF, $5F, $5A, $55, $98, $55, $D8
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.byte $55, $58, $55,$55, $58, $95, $85, $58
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.byte $55, $95, $A3,$55, $85, $5A, $A0,$12,$FF, $BF
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.byte $5F, $DD, $5B, $5F, $5D, $DF, $5D
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.byte $5F,$5F, $8F, $5D, $5F, $5D, $5B, $5D
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.byte $FF, $D5, $59, $95, $58, $55, $A0,$13,$FF
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.byte $55, $08, $55, $05, $50, $A3,$55, $58
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.byte $0A, $5D, $05, $0A,$0A, $58, $DF, $BD
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.byte $DA, $5A, $59, $85, $5A, $A0,$12,$FF, $55
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.byte $08, $50, $05, $55, $A4,$5A, $55,$55, $00
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.byte $50, $05, $D5, $FA, $FF, $DA, $B5
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.byte $88, $5A, $5D, $A0,$12,$FF, $55,$55, $50, $55
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.byte $05, $65, $5A,$5A, $55,$55, $45, $55,$55, $05
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.byte $D5, $FA, $DD, $BF, $D5, $98, $55,$55
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.byte $DF, $A0,$11,$FF, $A3,$55, $50, $54, $55,$55, $05
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.byte $65, $55, $45, $55, $50, $05, $D5
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.byte $BD, $DF, $FD, $95, $58, $8B, $58
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.byte $5F, $A0,$11,$FF, $55, $05, $54, $00, $56
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.byte $A3,$55, $45, $05, $50, $55,$55, $00, $55
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.byte $DD, $FF, $5D, $55, $89, $95, $58
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.byte $5A, $A0,$11,$FF, $5D, $00, $55, $00, $A3,$55
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.byte $00, $56, $00, $55, $54, $00, $55
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.byte $85, $5D, $FA, $DD, $55, $88, $55
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.byte $90, $5F, $A0,$11,$FF, $DD, $50, $05, $50
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.byte $05, $40, $55, $05, $60, $05, $40
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.byte $05, $50, $05, $55, $DD, $BA, $DF
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.byte $55, $88, $55, $90, $5D, $5A,$5A, $5F
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.byte $DA, $5F,$5F, $DF, $5F, $A9,$FF, $5D, $50
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.byte $05, $50, $55, $00, $54, $05, $50
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.byte $05, $45, $00, $55, $50, $55, $DD
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.byte $5F, $FF, $55, $89, $55,$55, $F5, $5A
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.byte $FA, $DD, $B5, $D9, $5A, $5D, $5A
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.byte $A9,$FF, $5A, $55, $05, $55, $00, $05
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.byte $40, $05, $50, $05, $50, $04, $50
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.byte $05, $D5, $5D, $DF, $FD, $5B, $5D
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.byte $5B, $5D, $5B, $5A, $DD, $BB, $5D
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.byte $5A,$5A, $55,$55, $FA, $A8,$FF, $FA, $5A, $DA
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.byte $5D, $85, $A4,$55, $D8, $55,$55, $58, $55
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.byte $D5, $59, $DF, $FD, $55, $00, $55
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.byte $00, $50, $05, $50, $00, $55, $5A,$5A
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.byte $5B, $55, $DD, $A8,$FF, $5A, $DF, $BD
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.byte $8F, $5D,$5D, $5B, $5D, $5B, $5D, $FB
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.byte $D5, $F5, $D8, $F5,$F5, $FD, $5B, $55
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.byte $50, $00, $05, $00, $55, $00,$00, $55,$55
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.byte $5A, $DD, $55, $FA, $A7,$FF, $5A, $DD
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.byte $BB, $DD, $BA, $DD, $5F, $9D, $5A,$5A
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.byte $DD, $55, $D5, $55, $D8, $BB, $D5
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.byte $5B, $5D, $55, $00, $52, $00, $55
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.byte $00, $55, $52, $05, $55, $5A, $DD
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.byte $55, $FA, $A5,$FF, $5F,$5F, $DF, $FA, $FF
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.byte $FA, $FB, $FD, $DB, $F5, $50, $D5
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.byte $59, $D5, $FD, $D9, $BF, $FA, $DB
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.byte $BD, $DF, $A3,$55, $50, $06, $50, $55
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.byte $59, $05, $55, $DA, $5D, $DA, $5F
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.byte $A3,$FF, $5F, $FF, $DF, $5D, $05, $5A,$5A
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.byte $8F, $5D, $5A, $5D, $5B, $5D, $DF
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.byte $BF, $5D, $FF, $DF, $5D, $FB, $DF
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.byte $FD, $55,$55, $00, $50, $05, $75, $05
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.byte $55, $05, $55,$55, $DD, $BA, $DD, $5A
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.byte $FF,$FF, $DF, $BF, $DA, $5D, $80, $55,$55
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.byte $85, $58, $05, $10, $05, $55, $51
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.byte $55, $00, $55, $05, $FD, $DF, $FD
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.byte $DD, $5B, $58, $55, $00,$00, $50, $02
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.byte $20, $05, $00, $55, $5A,$5A, $DF, $5A
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.byte $5D, $FF,$FF, $FA, $5F, $FD, $D5, $F5
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.byte $58, $5B, $55,$55, $15, $80, $58, $51
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.byte $55, $58, $85, $B0, $5A, $FF, $FD
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.byte $DF, $5D, $55, $58, $55, $50, $05
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.byte $50, $05, $00, $50, $05, $50, $5F
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.byte $DD, $5A, $F5, $FF,$FF, $5F,$5F, $A4,$FF, $FA
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.byte $FD, $FA,$FA, $F5, $FD, $FB, $55, $D5
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.byte $F5, $F8, $FB, $DD, $FF, $DD, $5A
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.byte $59, $A3,$55, $00, $55, $00, $55, $00
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.byte $55, $15, $00, $FD, $5A, $FA, $A4,$FF
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.byte $F5,$F5, $A4,$5A, $5F, $BF, $A3,$5F, $A5,$FF, $FD
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.byte $FF, $DF, $5D, $55, $DA, $55, $B8
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.byte $FA,$FA, $F5,$F5, $F7, $55,$55, $50, $55,$55, $AC,$FF
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.byte $FA,$FA, $A3,$F5, $B5, $A4,$5A, $A3,$5F, $FA, $DD
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.byte $5A, $F5, $A0,$12,$FF, $CF, $AF,$FF, $FA, $F5
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.byte $F0, $F5, $AF,$FF, $CF, $FF, $9F, $A3,$9C
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.byte $FC, $FF,$FF, $C9, $CF, $C9, $FF, $C9
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.byte $CF, $C9, $FF, $C9, $CF, $C9, $FF
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.byte $C9, $A3,$FF, $C9, $CF, $A4,$FF, $C9, $FF
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.byte $C9, $A3,$FF, $9F, $A3,$9C, $FC, $A5,$F2, $FF,$FF
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.byte $F6, $FF, $F6, $FF, $F6, $A3,$FF, $F6
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.byte $A3,$FF, $F6, $A3,$FF, $F6, $A5,$FF, $F6, $FF
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.byte $F6, $A3,$FF, $A5,$F2
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.byte $A1
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apple_high: .byte $28 ; ysize=48
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.byte $A8,$FF, $5F, $8F, $5F, $A5,$5A, $8F, $BA
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.byte $8F, $5A, $A3,$5F, $8F, $5F, $8F, $5F
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.byte $DF, $5F, $A0,$12,$FF, $DD, $5F, $5D, $5F
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.byte $9D, $5A, $5D, $5B, $9D, $FA, $5D
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.byte $FA,$FA, $D5, $FD, $D5, $55, $DD, $5A
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.byte $55,$55, $85, $A0,$12,$FF, $5D, $55, $95, $0D
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.byte $0A,$0A, $5A, $5D, $5A,$5A, $5B, $55, $05
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.byte $5A, $59, $B5, $DF, $FF, $DF, $58
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.byte $85, $58, $A0,$12,$FF, $5D, $55,$55, $50, $00
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.byte $55, $7A, $A3,$5A, $A4,$55, $00, $55, $DF
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.byte $DD, $5F, $D9, $55, $5A,$5A, $A0,$11,$FF, $DF
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.byte $5D, $00, $45, $05, $55, $A3,$5A, $55,$55
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.byte $05, $55, $05, $50, $55, $5D, $FF
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.byte $DA, $59, $55, $88, $5A, $A0,$11,$FF, $5F
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.byte $DD, $00, $50, $05, $55, $05, $65
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.byte $55,$55, $05, $50, $55, $05, $50, $55
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.byte $5F, $FD, $5A, $55, $85, $58, $55
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.byte $A0,$11,$FF, $DF, $5D, $50, $00, $55, $00
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.byte $45, $55, $05, $50, $55,$55, $00, $85
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.byte $55,$55, $5F, $FD, $DA, $55,$55, $58, $55
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.byte $A0,$12,$FF, $5A, $54, $40, $05, $40, $05
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.byte $50, $A3,$55, $05, $50, $55, $05, $B5
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.byte $DA, $FF, $FD, $15, $55, $88, $55
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.byte $5F, $A0,$11,$FF, $FA, $05, $50, $06, $60
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.byte $04, $55, $50, $05, $54, $55, $50
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.byte $85, $05, $BA, $DA, $FF, $DD, $55
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.byte $B5, $88, $55, $5F,$5F, $DF, $5F, $DF
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.byte $5F, $DF, $5F,$5F, $A8,$FF, $FA, $F5, $05
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.byte $40, $05, $50, $55, $05, $50, $45
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.byte $00, $55, $00, $55, $05, $55, $BA
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.byte $DD, $FF, $85, $58, $80, $B5, $DD
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.byte $9A, $5D, $5B, $DA, $5F, $5A, $DA
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.byte $5A, $A9,$FF, $5D, $85, $50, $00, $55
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.byte $56, $50, $05, $40, $05, $50, $05
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.byte $50, $00, $55, $BA, $DF, $5D, $D5
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.byte $5A,$5A, $DD, $5A, $FD, $5A,$5A, $DD, $5B
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.byte $9A, $DD, $55, $A9,$FF, $DD, $5A, $5D
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.byte $A3,$55, $D5, $50, $55, $50, $55, $50,$50
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.byte $85, $5A,$5A, $FF, $FD, $55, $50, $00
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.byte $55, $00, $05, $55, $05, $5D, $5A
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.byte $DA, $58, $55, $A8,$FF, $DF, $5D, $5B
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.byte $5D, $5B, $5D, $5B, $FD, $D5, $F8
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.byte $D5,$D5, $B8, $D5, $BB, $D8, $5B, $DD
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.byte $DF, $55, $00,$00, $55, $20, $00, $55
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.byte $00, $85, $5A, $59, $5A, $55, $A7,$FF
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.byte $BF, $DD, $FB, $5D, $FA, $DF, $59
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.byte $F5, $55, $D9, $55, $B5, $D5, $B5
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.byte $5D, $5B, $8D, $5F, $5D, $5A, $A3,$55
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.byte $05, $50, $00, $55, $00, $55, $D9
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.byte $5A, $55,$55, $A6,$FF, $DF, $FD, $FB, $FD
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.byte $DA, $FF, $DD, $5A, $B5, $D8, $A4,$55
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.byte $FF, $5A, $DF, $DD, $5F, $DD, $5A
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.byte $55,$55, $07, $50, $25, $50, $05, $BD
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.byte $55, $5D, $5A,$5A, $55, $A5,$FF, $DF, $BD
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.byte $FA, $5F, $8A, $1D, $5A, $5F,$5F, $FF
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.byte $DF, $FF, $5F, $FF, $DA, $FB, $FD
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.byte $FA, $FF, $FD, $FA, $55,$55, $A6,$05, $55,$55
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.byte $5A, $5B, $5A,$5A, $A4,$FF, $FD, $FB, $5D
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.byte $5B, $08, $15, $00, $55, $50, $89
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.byte $50, $85, $08, $55, $85, $5D, $5B
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.byte $DD, $BA, $FF, $5A,$5A, $55,$55, $50, $02
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.byte $00, $55, $00, $55, $00, $55, $BA
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.byte $DD, $5A,$5A, $5F, $FF, $BF, $DD, $FF
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.byte $DA, $BB, $55, $8A, $50, $0B, $88
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.byte $A4,$55, $00, $55,$55, $59, $D5, $BB, $DD
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.byte $BB, $A4,$55, $A3,$00, $25, $50, $05, $50
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.byte $00, $FA, $5F, $5A, $5F, $FA, $FF,$FF
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.byte $FD, $FF,$FF, $FA, $FF, $F9, $F5, $D5
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.byte $F5, $55,$55, $80, $58, $51, $F5, $55
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.byte $DA, $BF, $FD, $FB, $5A, $55, $85
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.byte $55,$55, $57, $70, $00, $27, $00, $55
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.byte $90, $55, $FB, $5A, $55, $A4,$FF, $55,$55
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.byte $5A,$5A, $A5,$5F, $FD, $A3,$FF, $FB, $FD, $FF,$FF
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.byte $FB, $FD, $5B, $9A, $5D, $55,$55, $A3,$F5
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.byte $55, $50,$50, $55, $5A, $55, $5A, $FA
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.byte $A9,$FF, $FA, $A3,$F5, $FA, $5A, $55,$55, $A3,$5A
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.byte $A3,$5F, $DF, $BA, $5A,$5A, $55, $A9,$FF, $FA
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.byte $A0,$15,$FF, $FA,$FA, $F0, $F5,$F5, $A3,$FA, $A0,$10,$FF, $DF,$DF
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.byte $DC, $DF, $A3,$FF, $DF, $F1, $DF, $FF
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.byte $D1, $F1, $D1, $FF, $D1, $F1, $D1
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.byte $FF, $D1, $A3,$FF, $D1, $F1,$F1, $FF,$FF, $F1
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.byte $D1, $FF, $D1, $F1, $FF,$FF, $DF,$DF, $DC
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.byte $DF, $FF, $F1, $A3,$61, $F1, $FF,$FF, $24
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.byte $FF, $24, $FF, $24, $A3,$FF, $24, $A3,$FF
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.byte $24, $2F,$2F, $FF, $24, $2F,$2F, $FF,$FF, $2F
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.byte $24, $FF, $24, $2F, $FF,$FF, $F1, $A3,$61, $F1
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.byte $A1
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287
megademo/falling_apple.s
Normal file
287
megademo/falling_apple.s
Normal file
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@ -0,0 +1,287 @@
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; Display Falling Apple II and message
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falling_apple:
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;===================
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; init screen
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jsr TEXT
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jsr HOME
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bit KEYRESET
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;===================
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; init vars
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lda #0
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sta DRAW_PAGE
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;=============================
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; Load graphic page0
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to $c00
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lda #<apple_low
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sta GBASL
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lda #>apple_low
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sta GBASH
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jsr load_rle_gr
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lda #4
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sta DRAW_PAGE
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jsr gr_copy_to_current ; copy to page1
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; GR part
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bit PAGE1
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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; jsr wait_until_keypressed
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;=============================
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; Load graphic page1
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to $c00
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lda #<apple_high
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sta GBASL
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lda #>apple_high
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sta GBASH
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jsr load_rle_gr
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lda #0
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sta DRAW_PAGE
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jsr gr_copy_to_current
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; GR part
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bit PAGE0
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; jsr wait_until_keypressed
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;==============================
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; setup graphics for vapor lock
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;==============================
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; Clear Page0
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lda #$0
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sta DRAW_PAGE
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lda #$44
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jsr clear_gr
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; Make screen half green
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lda #$11
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ldy #24
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jsr clear_page_loop
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;=====================================================
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; attempt vapor lock
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; by reading the "floating bus" we can see most recently
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; written value of the display
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; we look for $55 (which is the grey line)
|
||||
;=====================================================
|
||||
; See:
|
||||
; Have an Apple Split by Bob Bishop
|
||||
; Softalk, October 1982
|
||||
|
||||
; Challenges: each scan line scans 40 bytes.
|
||||
; The blanking happens at the *beginning*
|
||||
; So 65 bytes are scanned, starting at adress of the line - 25
|
||||
|
||||
; the scan takes 8 cycles, look for 4 repeats of the value
|
||||
; to avoid false positive found if the horiz blanking is mirroring
|
||||
; the line (max 3 repeats in that case)
|
||||
|
||||
vapor_lock_loop: ; first make sure we have all zeroes
|
||||
LDA #$11
|
||||
zxloop:
|
||||
LDX #$04
|
||||
wiloop:
|
||||
CMP $C051
|
||||
BNE zxloop
|
||||
DEX
|
||||
BNE wiloop
|
||||
|
||||
LDA #$44 ; now look for our border color (4 times)
|
||||
zloop:
|
||||
LDX #$04
|
||||
qloop:
|
||||
CMP $C051
|
||||
BNE zloop
|
||||
DEX
|
||||
BNE qloop
|
||||
|
||||
; found first line of black after green, at up to line 26 on screen
|
||||
; so we want roughly 22 lines * 4 = 88*65 = 5720 + 4550 = 10270
|
||||
; - 65 (for the scanline we missed) = 10205 - 12 = 10193
|
||||
|
||||
jsr gr_copy_to_current ; 6+ 9292
|
||||
; 10193 - 9298 = 895
|
||||
; Fudge factor (unknown) -30 = 865
|
||||
|
||||
; GR part
|
||||
bit LORES ; 4
|
||||
bit SET_GR ; 4
|
||||
bit FULLGR ; 4
|
||||
|
||||
; Try X=88 Y=2 cycles=893 R2
|
||||
|
||||
nop
|
||||
ldy #2 ; 2
|
||||
loopA:
|
||||
ldx #88 ; 2
|
||||
loopB:
|
||||
dex ; 2
|
||||
bne loopB ; 2nt/3
|
||||
|
||||
dey ; 2
|
||||
bne loopA ; 2nt/3
|
||||
|
||||
jmp display_loop
|
||||
.align $100
|
||||
|
||||
|
||||
;================================================
|
||||
; Display Loop
|
||||
;================================================
|
||||
; each scan line 65 cycles
|
||||
; 1 cycle each byte (40cycles) + 25 for horizontal
|
||||
; Total of 12480 cycles to draw screen
|
||||
; Vertical blank = 4550 cycles (70 scan lines)
|
||||
; Total of 17030 cycles to get back to where was
|
||||
|
||||
; We want to alternate between page1 and page2 every 65 cycles
|
||||
; vblank = 4550 cycles to do scrolling
|
||||
|
||||
|
||||
; 2 + 48*( (4+2+25*(2+3)) + (4+2+23*(2+3)+4+5)) + 9)
|
||||
; 48*[(6+125)-1] + [(6+115+10)-1]
|
||||
|
||||
display_loop:
|
||||
|
||||
ldy #48 ; 2
|
||||
|
||||
outer_loop:
|
||||
|
||||
bit PAGE0 ; 4
|
||||
ldx #25 ; 130 cycles with PAGE0 ; 2
|
||||
page0_loop: ; delay 126+bit
|
||||
dex ; 2
|
||||
bne page0_loop ; 2/3
|
||||
|
||||
|
||||
bit PAGE1 ; 4
|
||||
ldx #23 ; 130 cycles with PAGE1 ; 2
|
||||
page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
|
||||
dex ; 2
|
||||
bne page1_loop ; 2/3
|
||||
|
||||
nop ; 2
|
||||
lda DRAW_PAGE ; 3
|
||||
|
||||
dey ; 2
|
||||
bne outer_loop ; 2/3
|
||||
|
||||
|
||||
|
||||
;======================================================
|
||||
; We have 4550 cycles in the vblank, use them wisely
|
||||
;======================================================
|
||||
; do_nothing should be 4550+1 -2-9 -7= 4533
|
||||
|
||||
jsr do_nothing ; 6
|
||||
|
||||
lda KEYPRESS ; 4
|
||||
bpl no_keypress ; 3
|
||||
jmp start_over
|
||||
no_keypress:
|
||||
|
||||
jmp display_loop ; 3
|
||||
|
||||
start_over:
|
||||
rts
|
||||
|
||||
|
||||
;=================================
|
||||
; do nothing
|
||||
;=================================
|
||||
; and take 4533-6 = 4527 cycles to do it
|
||||
do_nothing:
|
||||
|
||||
; Try X=4 Y=174 cycles=4525 R2
|
||||
|
||||
nop ; 2
|
||||
|
||||
ldy #174 ; 2
|
||||
loop1:
|
||||
ldx #4 ; 2
|
||||
loop2:
|
||||
dex ; 2
|
||||
bne loop2 ; 2nt/3
|
||||
|
||||
dey ; 2
|
||||
bne loop1 ; 2nt/3
|
||||
|
||||
|
||||
rts ; 6
|
||||
|
||||
|
||||
|
||||
;==================================
|
||||
; HLINE
|
||||
;==================================
|
||||
|
||||
; Color in A
|
||||
; Y has which line
|
||||
hline:
|
||||
pha ; 3
|
||||
ldx gr_offsets,y ; 4+
|
||||
stx hline_loop+1 ; 4
|
||||
lda gr_offsets+1,y ; 4+
|
||||
clc ; 2
|
||||
adc DRAW_PAGE ; 3
|
||||
sta hline_loop+2 ; 4
|
||||
pla ; 4
|
||||
ldx #39 ; 2
|
||||
hline_loop:
|
||||
sta $5d0,X ; 38 ; 5
|
||||
dex ; 2
|
||||
bpl hline_loop ; 2nt/3
|
||||
rts ; 6
|
||||
|
||||
;==========================
|
||||
; Clear gr screen
|
||||
;==========================
|
||||
; Color in A
|
||||
clear_gr:
|
||||
ldy #46
|
||||
clear_page_loop:
|
||||
jsr hline
|
||||
dey
|
||||
dey
|
||||
bpl clear_page_loop
|
||||
rts
|
||||
|
||||
gr_offsets:
|
||||
.word $400,$480,$500,$580,$600,$680,$700,$780
|
||||
.word $428,$4a8,$528,$5a8,$628,$6a8,$728,$7a8
|
||||
.word $450,$4d0,$550,$5d0,$650,$6d0,$750,$7d0
|
||||
|
||||
|
||||
.include "../asm_routines/gr_unrle.s"
|
||||
.include "gr_copy.s"
|
||||
|
||||
.include "apple_40_96.inc"
|
||||
|
||||
|
||||
58
megademo/gr_copy.s
Normal file
58
megademo/gr_copy.s
Normal file
|
|
@ -0,0 +1,58 @@
|
|||
;=========================================================
|
||||
; gr_copy_to_current, 40x48 version
|
||||
;=========================================================
|
||||
; copy 0xc00 to DRAW_PAGE
|
||||
;
|
||||
; 45 + 2 + 120*(8*9 + 5) -1 + 6 = 9292
|
||||
|
||||
gr_copy_to_current:
|
||||
|
||||
lda DRAW_PAGE ; 3
|
||||
clc ; 2
|
||||
adc #$4 ; 2
|
||||
sta gr_copy_line+5 ; 4
|
||||
sta gr_copy_line+11 ; 4
|
||||
adc #$1 ; 2
|
||||
sta gr_copy_line+17 ; 4
|
||||
sta gr_copy_line+23 ; 4
|
||||
adc #$1 ; 2
|
||||
sta gr_copy_line+29 ; 4
|
||||
sta gr_copy_line+35 ; 4
|
||||
adc #$1 ; 2
|
||||
sta gr_copy_line+41 ; 4
|
||||
sta gr_copy_line+47 ; 4
|
||||
;===========
|
||||
; 45
|
||||
|
||||
ldy #119 ; for early ones, copy 120 bytes ; 2
|
||||
|
||||
gr_copy_line:
|
||||
lda $C00,Y ; load a byte (self modified) ; 4
|
||||
sta $400,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $C80,Y ; load a byte (self modified) ; 4
|
||||
sta $480,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $D00,Y ; load a byte (self modified) ; 4
|
||||
sta $500,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $D80,Y ; load a byte (self modified) ; 4
|
||||
sta $580,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $E00,Y ; load a byte (self modified) ; 4
|
||||
sta $600,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $E80,Y ; load a byte (self modified) ; 4
|
||||
sta $680,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $F00,Y ; load a byte (self modified) ; 4
|
||||
sta $700,Y ; store a byte (self modified) ; 5
|
||||
|
||||
lda $F80,Y ; load a byte (self modified) ; 4
|
||||
sta $780,Y ; store a byte (self modified) ; 5
|
||||
|
||||
dey ; decrement pointer ; 2
|
||||
bpl gr_copy_line ; ; 2nt/3
|
||||
|
||||
rts ; 6
|
||||
|
||||
|
|
@ -26,12 +26,13 @@
|
|||
|
||||
|
||||
;===================
|
||||
; do nothing
|
||||
; Loop Forever
|
||||
;===================
|
||||
do_nothing:
|
||||
jmp do_nothing
|
||||
loop_forever:
|
||||
jmp loop_forever
|
||||
|
||||
|
||||
.include "lz4_decode.s"
|
||||
.include "c64_opener.s"
|
||||
.include "falling_apple.s"
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user