54 lines
627 B
ArmAsm
54 lines
627 B
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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WAIT = $FCA8 ; delay 1/2(26+27A+5A^2) us
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; zero page use
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BTC_L = $FE
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BTC_H = $FF
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SAVEL = $FC
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SAVEH = $FD
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test_audio:
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; lda #$D0
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; sta SAVEH
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; lda #$00
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; sta SAVEL
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test_loop:
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; lda SAVEH
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; sta BTC_H
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; lda SAVEL
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; sta BTC_L
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lda #<duck_sound
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sta BTC_L
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lda #>duck_sound
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sta BTC_H
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ldx #3
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jsr play_audio
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jsr wait_until_keypress
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inc SAVEH
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jmp test_loop
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bob:
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jmp bob
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wait_until_keypress:
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lda KEYPRESS
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bpl wait_until_keypress
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bit KEYRESET
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rts
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.include "audio.s"
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duck_sound:
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.incbin "duck.btc"
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