mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-25 18:33:11 +00:00
333 lines
7.0 KiB
Plaintext
333 lines
7.0 KiB
Plaintext
EVENT__start = 1
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EVENT__postframe = 1
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EVENT__preframe = 1
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EVENT__prekernel = 1
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EVENT__postkernel = 1
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EVENT__musicframe = 1
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EVENT__musicpulse = 1
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EVENT__musicnote = 1
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EVENT__playmusic = 1
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EVENT__stopmusic = 1
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EVENT__musicdone = 1
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EVENT__preframeloop = 1
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.scope music
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.zeropage
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MusicPlayer_timer_b0:
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.res 1
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MusicChannel_duration_b0:
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.res 1
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.res 1
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MusicChannel_note_b0:
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.res 1
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.res 1
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MusicChannel_duty_b0:
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.res 1
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.res 1
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MusicPlayer_channel_b0:
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.res 1
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MusicPlayer_songptr_b0:
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.res 1
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MusicPlayer_songptr_b8:
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.res 1
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.code
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MusicPlayer_volume_b0:
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.byte 10
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MusicPlayer_tempo_b0:
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.byte 31
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music__INITDATA:
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.byte 255
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.byte 0
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.byte 0
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.byte 0
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.byte 0
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.byte 0
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.byte 0
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.byte 0
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.byte 0
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.byte 0
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__Start:
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;;; start action Init__main_init__1
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.include "vcs-ca65.h"
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.macpack longbranch
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.define PAL 0
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__NMI:
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__Reset:
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__BRK:
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CLEAN_START
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ldy #10
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: lda music__INITDATA-1,y
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sta MusicPlayer_timer_b0-1,y
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dey
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bne :-
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;;; start action FrameLoop__start__3
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;;; start action music__preframeloop__5
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;;; start action music__musicdone__7
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; TODO: nested exprs
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;
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jsr MusicPlayer__playmusic__10
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;SampleMusic
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jsr MusicPlayer__playmusic__13
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;;; end action music__musicdone__7
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;;; end action music__preframeloop__5
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FrameLoop__start__4__NextFrame:
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FRAME_END
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FRAME_START
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;;; start action MusicPlayer__preframe__16
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;;; start action MusicPlayer__musicpulse__18
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ldx #0
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MusicPlayer__musicpulse__19____each:
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; Decrement the volumes for each channel
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; Also decrement next-note timer, fetch next note
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lda MusicChannel_duration_b0,x
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beq :+
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lsr
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sta AUDV0,x
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dec MusicChannel_duration_b0,x
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:
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inx
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cpx #2
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jne MusicPlayer__musicpulse__19____each
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MusicPlayer__musicpulse__19____exit:
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;;; end action MusicPlayer__musicpulse__18
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;;; start action MusicPlayer__musicpulse__21
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lda MusicPlayer_timer_b0
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bmi MusicPlayer__musicpulse__23__Done
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beq MusicPlayer__musicpulse__23__NextData
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dec MusicPlayer_timer_b0
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jmp MusicPlayer__musicpulse__23__Done
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; Timer ran out, so fetch next note
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MusicPlayer__musicpulse__23__NextData:
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ldx #0
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lda (MusicPlayer_songptr_b0,x)
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bmi MusicPlayer__musicpulse__23__LoadDuration
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; < $80, play next note
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ldx MusicPlayer_channel_b0 ; next channel
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tay
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;;; start action MusicPlayer__musicnote__24
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; Play a note
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; X = channel (0,1)
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; Y = note index (0-63)
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lda FREQZ,y
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sta MusicChannel_note_b0,x
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lda DUTYZ,y
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sta MusicChannel_duty_b0,x
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lda TONEZ,y
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sta AUDC0,x
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; TODO: consts?
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lda MusicPlayer_tempo_b0
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sta MusicChannel_duration_b0,x
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lda MusicPlayer_volume_b0
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sta AUDV0,x
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;;; end action MusicPlayer__musicnote__24
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inx
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txa
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and #1
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sta MusicPlayer_channel_b0 ; inc next channel
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jmp MusicPlayer__musicpulse__23__IncDataPtr
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; >= $80, load next duration
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MusicPlayer__musicpulse__23__LoadDuration:
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cmp #$ff ; $ff = end of song
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bne MusicPlayer__musicpulse__23__NoResetTrack
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sta MusicPlayer_timer_b0
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;;; start action music__musicdone__27
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; TODO: nested exprs
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;
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jsr MusicPlayer__playmusic__10
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;SampleMusic
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jsr MusicPlayer__playmusic__13
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;;; end action music__musicdone__27
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jmp MusicPlayer__musicpulse__23__Done
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MusicPlayer__musicpulse__23__NoResetTrack:
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and #$7f
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; asl
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sta MusicPlayer_timer_b0 ; store duration * 2
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MusicPlayer__musicpulse__23__IncDataPtr:
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; increment song pointer
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inc MusicPlayer_songptr_b0
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bne MusicPlayer__musicpulse__23__Done
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inc MusicPlayer_songptr_b8
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MusicPlayer__musicpulse__23__Done:
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;;; end action MusicPlayer__musicpulse__21
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; update song
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jsr MusicPlayer__musicframe__36
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; update registers
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;;; end action MusicPlayer__preframe__16
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;;; start action MusicPlayer__prekernel__39
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jsr MusicPlayer__musicframe__36
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; update registers
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;;; end action MusicPlayer__prekernel__39
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KERNEL_START
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KERNEL_END
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;;; start action MusicPlayer__postkernel__44
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jsr MusicPlayer__musicframe__36
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; update registers
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;;; end action MusicPlayer__postkernel__44
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;;; start action FrameLoop__postframe__49
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lsr SWCHB ; test Game Reset switch
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bcs FrameLoop__postframe__50__NoStart
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FrameLoop__postframe__50__NoStart:
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;;; end action FrameLoop__postframe__49
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;;; start action MusicPlayer__postframe__51
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jsr MusicPlayer__musicframe__36
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; update registers
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;;; end action MusicPlayer__postframe__51
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jmp FrameLoop__start__4__NextFrame ; loop to next frame
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;;; end action FrameLoop__start__3
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; start main routine
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.segment "VECTORS"
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ZeroByte: .byte $00
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Return: .byte $60
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VecNMI:
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VecReset: .word __Reset
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VecBRK: .word __BRK
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.code
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;;; end action Init__main_init__1
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.rodata
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__ALIGNORIGIN:
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.rodata
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MusicPlayer__playmusic__10:
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lda #<^SampleMusic
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sta MusicPlayer_songptr_b0
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lda #>^SampleMusic
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sta MusicPlayer_songptr_b8
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lda #0
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sta MusicPlayer_timer_b0
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rts
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.rodata
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MusicPlayer__playmusic__13:
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lda #<SampleMusic
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sta MusicPlayer_songptr_b0
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lda #>SampleMusic
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sta MusicPlayer_songptr_b8
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lda #0
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sta MusicPlayer_timer_b0
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rts
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.rodata
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MusicPlayer__musicframe__36:
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ldx #0
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MusicPlayer__musicframe__37____each:
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; Update channel pitch in AUDF0
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; 8-bit rotation of duty cycle bits
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lda MusicChannel_duration_b0,x
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beq :++
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lda MusicChannel_duty_b0,x
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asl
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bcc :+
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ora #1
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: sta MusicChannel_duty_b0,x
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lda MusicChannel_note_b0,x
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beq :+
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; If next bit is set, add 1 to AUDF0
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adc #0
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sta AUDF0,x
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:
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inx
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cpx #2
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jne MusicPlayer__musicframe__37____each
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MusicPlayer__musicframe__37____exit:
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rts
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SampleMusic:
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;;; start action SampleMusic__SampleMusic__56
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.byte $35,$41,$8a,$37,$43,$8a,$33,$3f,$8a,$30,$3c,$94,$3e,$32,$8a,$3a,$2e,$94,$35,$29,$8a,$37,$2b,$8a,$33,$27,$8a,$30,$24,$94,$32,$26,$8a,$2e,$22,$94,$29,$1d,$8a,$2b,$1f,$8a,$27,$1b,$8a,$24,$18,$94,$1a,$26,$8a,$18,$24,$8a,$17,$23,$8a,$16,$22,$a8,$3a,$35,$ff
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;;; end action SampleMusic__SampleMusic__56
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FREQZ:
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;;; start action FREQZ__FREQZ__58
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.byte 30, 30, 30, 30, 30, 28, 26, 25, 23, 22, 21, 19, 18, 17, 16, 15, 14, 13, 12, 12, 11, 10, 10, 9, 8, 8, 7, 7, 6, 6, 5, 5, 30, 29, 27, 25, 24, 22, 21, 20, 19, 18, 16, 15, 15, 14, 13, 12, 11, 11, 10, 31, 29, 27, 25, 24, 23, 21, 20, 19, 18, 16, 15, 15
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;;; end action FREQZ__FREQZ__58
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DUTYZ:
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;;; start action DUTYZ__DUTYZ__60
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.byte 247, 247, 247, 247, 1, 73, 219, 1, 219, 73, 0, 219, 181, 85, 85, 85, 181, 219, 247, 1, 73, 181, 0, 73, 219, 17, 219, 17, 219, 73, 247, 85, 247, 1, 85, 247, 73, 247, 181, 17, 1, 0, 247, 247, 0, 1, 17, 73, 181, 0, 17, 0, 1, 85, 247, 73, 0, 181, 73, 1, 0, 247, 247, 0
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;;; end action DUTYZ__DUTYZ__60
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TONEZ:
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;;; start action TONEZ__TONEZ__62
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.byte 0, 0, 0, 0, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
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;;; end action TONEZ__TONEZ__62
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.endscope
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music__Start = music::__Start |