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54 lines
824 B
ArmAsm
54 lines
824 B
ArmAsm
; Tiny Mockingboard Player
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; 514B -- Initial implementation
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; 423B -- inline everything
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; 400B -- put register init at end of song
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SONG_L = $70
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SONG_H = $71
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SONG_OFFSET = $72
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SONG_COUNTDOWN = $73
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; proposed format
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; CCOONNNN -- c=channel, o=octave, n=note
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; 11LLLLLL -- L=length
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; 11LLLLLL -- wait time
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; by deater (Vince Weaver) <vince@deater.net>
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; Zero Page
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.include "zp.inc"
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.include "hardware.inc"
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;==========================================
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tiny_music:
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;===================
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;
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;===================
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; Player Setup
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lda #<yankee_doodle_song
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sta SONG_L
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lda #>yankee_doodle_song
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sta SONG_H
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; assume mockingboard in slot#4
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jsr mockingboard_init
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start_interrupts:
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cli
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forever:
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jmp forever
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.include "mockingboard_setup.s"
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.include "interrupt_handler.s"
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.include "yankee_music.s"
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