106 lines
1.1 KiB
ArmAsm
106 lines
1.1 KiB
ArmAsm
; Soft Switches
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KEYPRESS= $C000
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KEYRESET= $C010
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SPEAKER = $C030
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repo:
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repo_loop:
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bit SPEAKER
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; delay extra
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extra_smc:
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ldx extra_high_values
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beq delay_high
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extra_loop:
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ldy #255
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extra_inner_loop:
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lda #200
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jsr delay_a
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dey
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bne extra_inner_loop
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dex
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bne extra_loop
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; delay high
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delay_high:
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high_smc:
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ldx high_values
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high_loop:
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lda #200
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jsr delay_a
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dex
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bne high_loop
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low_delay:
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low_smc:
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lda low_values ; 4
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cmp #$FF ; 2
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beq done ; 2 normally
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jsr delay_a ; 25+A
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clc ; 2
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lda low_smc+1
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adc #1
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sta low_smc+1
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lda #0
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adc low_smc+2
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sta low_smc+2
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clc
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lda high_smc+1
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adc #1
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sta high_smc+1
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lda #0
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adc high_smc+2
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sta high_smc+2
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clc
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lda extra_smc+1
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adc #1
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sta extra_smc+1
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lda #0
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adc extra_smc+2
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sta extra_smc+2
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jmp repo_loop
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done:
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lda KEYPRESS
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bpl done
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bit KEYRESET
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lda #<low_values
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sta low_smc+1
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lda #>low_values
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sta low_smc+2
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lda #<high_values
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sta high_smc+1
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lda #>high_values
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sta high_smc+2
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lda #<extra_high_values
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sta extra_smc+1
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lda #>extra_high_values
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sta extra_smc+2
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jmp repo
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.include "sample.inc"
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.align $100
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.include "delay_a.s"
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