1 files changed, 101 insertions, 0 deletions
diff --git a/home/audio.asm b/home/audio.asm
new file mode 100644
index 0000000..622e5da
--- /dev/null
+++ b/home/audio.asm
@@ -0,0 +1,101 @@
+
+PlaySong: ; 0x490
+	ld a, [hLoadedROMBank]
+	push af
+	ld a, [wCurrentSongBank]
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	ld a, e
+	ld [wStageSong], a
+	ld a, [wCurrentSongBank]
+	ld [wStageSongBank], a
+	call PlaySong_BankF  ; this function is replicated in multiple banks.
+	pop af
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	ret
+
+PlaySoundEffect: ; 0x4af
+; u8 d = duration
+; u8 e = SFX ID
+	ld a, [wdead]
+	and a
+	ret nz
+	ld a, [wSFXTimer]
+	and a
+	jr z, .asm_4bd
+	ld a, d
+	and a
+	ret z
+.asm_4bd
+	ld a, d
+	ld [wSFXTimer], a
+	ld d, $0
+	ld a, [hLoadedROMBank]
+	push af
+	ld a, [wCurrentSongBank]
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	call PlaySoundEffect_BankF  ; this function is replicated in multiple banks
+	pop af
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	ret
+
+PlaySFXIfNoneActive: ; 0x4d8
+	push bc
+	push de
+	push hl
+	ld a, [wChannel4 + 2]
+	ld hl, wChannel5 + 2
+	or [hl]
+	ld hl, wChannel6 + 2
+	or [hl]
+	and $1
+	call z, PlaySoundEffect
+	pop hl
+	pop de
+	pop bc
+	ret
+
+PlayCry: ; 0x4ef
+; Plays a Pokemon cry.
+; Input:  e = mon id
+	ld a, [hLoadedROMBank]
+	push af
+	ld a, [wCurrentSongBank]
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	call PlayCry_BankF  ; this function is replicated in multiple banks
+	pop af
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	ret
+
+UpdateSFX: ; 0x504
+	ld a, [hLoadedROMBank]
+	push af
+	ld a, [wCurrentSongBank]
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	call Func_3c180
+	pop af
+	ld [hLoadedROMBank], a
+	ld [MBC5RomBank], a
+	ld a, [wd801]
+	inc a
+	ld [wd801], a
+	and $3
+	ret nz
+	ld a, [wSFXTimer]
+	and a
+	ret z
+	dec a
+	ld [wSFXTimer], a
+	ret
+
+SetSongBank: ; 0x52c
+	di
+	ld [wCurrentSongBank], a
+	ei
+	ret