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INCLUDE "constants.asm"
SECTION "Audio", ROMX[$4000], BANK[$3A]
_DisableAudio:: ; 3a:4000
push hl
push de
push bc
push af
ld hl, rNR50
xor a
ld [hli], a
ld [hli], a
ld a, $80
ld [hli], a
ld hl, rNR10
ld e, 4
.init_channel
xor a
ld [hli], a
ld [hli], a
ld a, 8
ld [hli], a
xor a
ld [hli], a
ld a, $80
ld [hli], a
dec e
jr nz, .init_channel
ld hl, wMusic
ld de, wMusicInitEnd - wMusic
.clear
xor a
ld [hli], a
dec de
ld a, e
or d
jr nz, .clear
ld a, $77
ld [wVolume], a
pop af
pop bc
pop de
pop hl
ret
_UpdateSound:: ; 3a:4037
xor a
; So, I'm being told I need to disassemble this...
; OH HELL NO
; ... TODO :/
SECTION "Audio engine, part 2", ROMX[$4CEE],BANK[$3A] ; TODO: disassemble what's above (gulp) and remove this
SetGlobalTempo: ; 3a:4cee
push bc
ld a, [wCurChannel]
cp CHAN5
jr nc, .sfxchannels
ld bc, wChannel1
call Tempo
ld bc, wChannel2
call Tempo
ld bc, wChannel3
call Tempo
ld bc, wChannel4
call Tempo
jr .end
.sfxchannels
ld bc, wChannel5
call Tempo
ld bc, wChannel6
call Tempo
ld bc, wChannel7
call Tempo
ld bc, wChannel8
call Tempo
.end
pop bc
ret
Tempo: ; 3a:4d2a
ld hl, wChannel1Tempo - wChannel1
add hl, bc
ld [hl], e
inc hl
ld [hl], d
xor a
ld hl, wChannel1Field16 - wChannel1
add hl, bc
ld [hl], a
ret
StartChannel: ; 3a:4d38
call SetLRTracks
ld hl, wChannel1Flags - wChannel1
add hl, bc
set SOUND_CHANNEL_ON, [hl]
ret
StopChannel: ; 3a:4d42
ld hl, wChannel1Flags - wChannel1
add hl, bc
res SOUND_CHANNEL_ON, [hl]
ld hl, wChannel1MusicID - wChannel1
add hl, bc
xor a
ld [hli], a
ld [hli], a
ld [hli], a
ret
SetLRTracks: ; 3a:4d51
push de
ld a, [wCurChannel]
maskbits NUM_MUSIC_CHANS
ld e, a
ld d, 0
ld hl, $52B3 ; FIXME
add hl, de
ld a, [hl]
ld hl, wChannel1Tracks - wChannel1
add hl, bc
ld [hl], a
pop de
ret
_PlayMusic:: ; 3a:4d66
ld hl, wMusicID
ld [hl], e
inc hl
ld [hl], d
ld hl, Music
add hl, de
add hl, de
add hl, de
ld a, [hli]
ld [wMusicBank], a
ld e, [hl]
inc hl
ld d, [hl]
call LoadMusicByte
rlca
rlca
maskbits NUM_MUSIC_CHANS
inc a
.loop
push af
call LoadChannel
call StartChannel
pop af
dec a
jr nz, .loop
xor a
; TODO
SECTION "Song Header Pointers", ROMX[$52C7], BANK[$3A]
INCLUDE "audio/song_header_pointers.inc"
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