mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-05-28 17:41:29 +00:00
97 lines
1.3 KiB
ArmAsm
97 lines
1.3 KiB
ArmAsm
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; zero page
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HGR_X = $E0
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HGR_XH = $E1
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HGR_Y = $E2
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HGR_COLOR = $E4
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YRUN = $F0
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XRUN = $F1
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Y1 = $F2
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X1 = $F3
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COLOR = $F4
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COLOR1 = $F5
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COLOR2 = $F6
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; rom routines
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HGR2 = $F3D8
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HPOSN = $F411
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HLINRL = $F530
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COLORTBL = $F6F6
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myst_tiny:
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jsr HGR2
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outer_loop:
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ldy #5
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data_smc:
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lda $C00
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sta YRUN-1,Y
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inc data_smc+1
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dey
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bne data_smc
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rectangle_loop:
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lda COLOR
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asl ; nibble swap by david galloway
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adc #$80
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rol
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asl
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adc #$80
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rol
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sta COLOR
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and #$f
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tax
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lda COLORTBL,X
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sta HGR_COLOR
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ldx X1 ; X1 into X
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lda Y1 ; Y1 into A
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ldy #0 ; always 0
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jsr HPOSN ; (Y,X),(A) (values stores in HGRX,XH,Y)
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lda XRUN ; XRUN into A
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ldx #0 ; always 0
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ldy #0 ; relative Y is 0
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jsr HLINRL ; (X,A),(Y)
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inc Y1
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dec YRUN
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bne rectangle_loop
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beq outer_loop
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data:
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.byte $33,$00,$00,$8C,$5A
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.byte $33,$8C,$00,$8B,$5A
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.byte $16,$00,$5A,$8C,$65
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.byte $16,$8C,$5A,$8B,$65
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.byte $42,$9D,$79,$33,$46
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.byte $07,$8D,$74,$5A,$13
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.byte $00,$B4,$11,$21,$68
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.byte $70,$9C,$14,$35,$6A
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.byte $07,$91,$0A,$43,$0A
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.byte $07,$A2,$00,$3A,$14
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.byte $50,$AC,$5B,$0F,$20
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.byte $77,$A9,$1F,$16,$20
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.byte $77,$A5,$27,$1D,$15
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.byte $51,$00,$A3,$3F,$1C
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.byte $51,$3F,$A7,$72,$18
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.if 0
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.byte $51,$B1,$B9,$35,$06
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.byte $50,$17,$00,$10,$B2
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.byte $15,$01,$0D,$62,$1F
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.byte $50,$00,$00,$12,$BC
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.byte $05,$42,$00,$0F,$BB
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.byte $00,$B1,$20,$04,$12
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.endif
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