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64 lines
629 B
ArmAsm
64 lines
629 B
ArmAsm
;============================
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; do the pan
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horiz_pan:
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pan_loop:
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lda #0
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sta COUNT
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pan_outer_outer_loop:
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ldx #191
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pan_outer_loop:
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lda hposn_high,X
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sta pil_smc1+2
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sta pil_smc2+2
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sta pil_smc4+2
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eor #$60
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sta pil_smc3+2
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lda hposn_low,X
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sta pil_smc2+1
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sta pil_smc4+1
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sta pil_smc1+1
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inc pil_smc1+1
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clc
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adc COUNT
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sta pil_smc3+1
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ldy #0
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pan_inner_loop:
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pil_smc1:
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lda $2000+1,Y
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pil_smc2:
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sta $2000,Y
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iny
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cpy #39
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bne pan_inner_loop
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pil_smc3:
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lda $4000
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pil_smc4:
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sta $2000,Y
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dex
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cpx #$ff
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bne pan_outer_loop
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; jsr wait_until_keypress
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inc COUNT
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lda COUNT
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cmp #39
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bne pan_outer_outer_loop
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rts
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