Finish disassembly of ROM0

5 files changed, 468 insertions, 27 deletions

diff --git a/home/audio.asm b/home/audio.asm
index d868b4b7..f54445f7 100644
--- a/home/audio.asm
+++ b/home/audio.asm
@@ -1,14 +1,443 @@
-DisableAudio::
-	dr $3d4f, $3de4
+DisableAudio:: ; 3d4f (0:3d4f)
+	push hl
+	push de
+	push bc
+	push af
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(DisableAudio_)
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	call DisableAudio_
+	pop af
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
 
-Function3de4::
-	dr $3de4, $3e24
+UpdateSound:: ; 3d6b (0:3d6b)
+	push hl
+	push de
+	push bc
+	push af
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(UpdateSound_)
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	call UpdateSound_
+	pop af
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
 
-PlaySFX::
-	dr $3e24, $3e56
+LoadMusicByte_::
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
 
-WaitSFX::
-	dr $3e56, $3e92
+	ld a, [de]
+	ld [wCurMusicByte], a
+	ld a, BANK(UpdateSound_)
 
-Function3e92::
-	dr $3e92, $3fee
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	ret
+
+PlayMusic:: ; 3d98 (0:3d98)
+	push hl
+	push de
+	push bc
+	push af
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(PlayMusic_)
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	ld a, e
+	and a
+	jr z, .asm_3daf
+	call PlayMusic_ ; $4b30
+	jr .asm_3db2
+
+.asm_3daf
+	call DisableAudio_
+.asm_3db2
+	pop af
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+PlayMusic2::
+	push hl
+	push de
+	push bc
+	push af
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(PlayMusic_)
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	push de
+	ld de, MUSIC_NONE
+	call PlayMusic_
+	call DelayFrame
+	pop de
+	call PlayMusic_
+	pop af
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+PlayCryHeader:: ; 3de4 (0:3de4)
+	push hl
+	push de
+	push bc
+	push af
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(CryHeaders) ; $3c
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	ld hl, CryHeaders ; $6747
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	add hl, de
+	ld e, [hl]
+	inc hl
+	ld d, [hl]
+	inc hl
+	ld a, [hli]
+	ld [wCryPitch], a
+	ld a, [hli]
+	ld [wCryPitch + 1], a
+	ld a, [hli]
+	ld [wCryLength], a
+	ld a, [hl]
+	ld [wCryLength + 1], a
+	ld a, BANK(PlayCryHeader_)
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	call PlayCryHeader_
+	pop af
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+PlaySFX:: ; 3e24 (0:3e24)
+	push hl
+	push de
+	push bc
+	push af
+	call CheckSFX
+	jr nc, .asm_3e33
+	ld a, [wCurSFX]
+	cp e
+	jr c, .asm_3e4a
+.asm_3e33
+	ld a, [hROMBank]
+	push af
+	ld a, BANK(PlaySFX_) ; $3a
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+	ld a, e
+	ld [wCurSFX], a
+	call PlaySFX_ ; $4c04
+	pop af
+	ld [hROMBank], a
+	ld [MBC3RomBank], a
+.asm_3e4a
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+WaitPlaySFX::
+	call WaitSFX
+	call PlaySFX
+	ret
+
+WaitSFX:: ; 3e56 (0:3e56)
+	push hl
+.asm_3e57
+	ld hl, wChannel5Flags
+	bit 0, [hl]
+	jr nz, .asm_3e57
+	ld hl, wChannel6Flags
+	bit 0, [hl]
+	jr nz, .asm_3e57
+	ld hl, wChannel7Flags
+	bit 0, [hl]
+	jr nz, .asm_3e57
+	ld hl, wChannel8Flags
+	bit 0, [hl]
+	jr nz, .asm_3e57
+	pop hl
+	ret
+
+MaxVolume::
+	ld a, $77
+	ld [wVolume], a
+	ret
+
+LowVolume::
+	ld a, $33
+	ld [wVolume], a
+	ret
+
+VolumeOff::
+	xor a
+	ld [wVolume], a
+	ret
+
+FadeOutMusic::
+	ld a, $4
+	ld [wMusicFade], a
+	ret
+
+FadeInMusic::
+	ld a, 4 | 1 << 7
+	ld [wMusicFade], a
+	ret
+
+Function3e92:: ; 3e92 (0:3e92)
+	and a
+	ret z
+	dec a
+	call UpdateSound
+	jr Function3e92
+
+FadeToMapMusic::
+	push hl
+	push de
+	push bc
+	push af
+	call GetMapMusic
+	ld a, [wMapMusic]
+	cp e
+	jr z, .asm_3eb8
+	ld a, $8
+	ld [wMusicFade], a
+	ld a, e
+	ld [wMusicFadeID], a
+	ld a, d
+	ld [wc1aa], a
+	ld a, e
+	ld [wChannelsEnd], a
+.asm_3eb8
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+PlayMapMusic::
+	push hl
+	push de
+	push bc
+	push af
+	call GetMapMusic
+	ld a, [wMapMusic]
+	cp e
+	jr z, .asm_3edc
+	push de
+	ld de, MUSIC_NONE
+	call PlayMusic
+	call DelayFrame
+	pop de
+	ld a, e
+	ld [wMapMusic], a
+	call PlayMusic
+.asm_3edc
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+EnterMapMusic::
+	push hl
+	push de
+	push bc
+	push af
+	xor a
+	ld [wDontPlayMapMusicOnReload], a
+	ld de, MUSIC_BICYCLE
+	ld a, [wPlayerBikeSurfState]
+	cp $1
+	jr z, .asm_3ef6
+	call GetMapMusic
+.asm_3ef6
+	push de
+	ld de, MUSIC_NONE
+	call PlayMusic
+	call DelayFrame
+	pop de
+	ld a, e
+	ld [wChannelsEnd], a
+	call PlayMusic
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+TryRestartMapMusic::
+	ld a, [wDontPlayMapMusicOnReload]
+	and a
+	jr z, RestartMapMusic
+	xor a
+	ld [wChannelsEnd], a
+	ld de, MUSIC_NONE
+	call PlayMusic
+	call DelayFrame
+	xor a
+	ld [wDontPlayMapMusicOnReload], a
+	ret
+
+RestartMapMusic::
+	push hl
+	push de
+	push bc
+	push af
+	ld de, MUSIC_NONE
+	call PlayMusic
+	call DelayFrame
+	ld a, [wChannelsEnd]
+	ld e, a
+	ld d, $0
+	call PlayMusic
+	pop af
+	pop bc
+	pop de
+	pop hl
+	ret
+
+SpecialMapMusic:: ; 3f40 (0:3f40)
+	ld a, [wPlayerBikeSurfState]
+	cp $4
+	jr z, .asm_3f59
+	cp $8
+	jr z, .asm_3f59
+	ld a, [wd572]
+	bit 2, a
+	jr nz, .asm_3f5e
+.asm_3f52
+	and a
+	ret
+
+.bike
+	ld de, MUSIC_BICYCLE
+	scf
+	ret
+
+.asm_3f59
+	ld de, MUSIC_SURF
+	scf
+	ret
+
+.asm_3f5e
+	ld a, [wMapGroup]
+	cp GROUP_ROUTE_35_NATIONAL_PARK_GATE
+	jr nz, .asm_3f52
+	ld a, [wMapNumber]
+	cp MAP_ROUTE_35_NATIONAL_PARK_GATE
+	jr z, .asm_3f70
+	cp MAP_ROUTE_36_NATIONAL_PARK_GATE
+	jr nz, .asm_3f52
+.asm_3f70
+	ld de, MUSIC_BUG_CATCHING_CONTEST_RANKING
+	scf
+	ret
+
+GetMapMusic:: ; 3f75 (0:3f75)
+	call SpecialMapMusic
+	ret c
+	call GetMapHeaderMusic
+	ret
+
+Function3f7d::
+	ld a, $20
+	ld [$c398], a
+	ld [$c39c], a
+	ld a, $50
+	ld [$c399], a
+	ld a, $58
+	ld [$c39d], a
+	xor a
+	ld [$c39b], a
+	ld [$c39f], a
+	ld a, [wc196]
+	cp $64
+	jr nc, .asm_3fb3
+	add $1
+	daa
+	ld b, a
+	swap a
+	and $f
+	add $f6
+	ld [$c39a], a
+	ld a, b
+	and $f
+	add $f6
+	ld [$c39e], a
+	ret
+
+.asm_3fb3
+	ld a, $ff
+	ld [$c39a], a
+	ld [$c39e], a
+	ret
+
+CheckSFX:: ; 3fbc (0:3fbc)
+	ld a, [wChannel5Flags]
+	bit 0, a
+	jr nz, .asm_3fda
+	ld a, [wChannel6Flags]
+	bit 0, a
+	jr nz, .asm_3fda
+	ld a, [wChannel7Flags]
+	bit 0, a
+	jr nz, .asm_3fda
+	ld a, [wChannel8Flags]
+	bit 0, a
+	jr nz, .asm_3fda
+	and a
+	ret
+
+.asm_3fda
+	scf
+	ret
+
+TerminateExpBarSound::
+	xor a
+	ld [wChannel5Flags], a
+	ld [wSoundInput], a
+	ld [rNR10], a
+	ld [rNR11], a
+	ld [rNR12], a
+	ld [rNR13], a
+	ld [rNR14], a
+	ret
diff --git a/home/cry.asm b/home/cry.asm
index d4219d07..6a6dd561 100644
--- a/home/cry.asm
+++ b/home/cry.asm
@@ -19,7 +19,7 @@ continue_cry_fn
 	jr c, .asm_3a12
 	ld e, c
 	ld d, b
-	call Function3de4
+	call PlayCryHeader
 	call WaitSFX
 .asm_3a12
 	pop bc
diff --git a/home/vblank.asm b/home/vblank.asm
index 8a41cb44..77e68b91 100644
--- a/home/vblank.asm
+++ b/home/vblank.asm
@@ -124,9 +124,9 @@ VBlank0:: ; 180
 .ok2
 
 	call Joypad
-	ld a, BANK(_UpdateSound)
+	ld a, BANK(UpdateSound_)
 	rst Bankswitch
-	call _UpdateSound
+	call UpdateSound_
 	ld a, [wROMBankBackup]
 	rst Bankswitch
 	ld a, [hSeconds]
@@ -181,9 +181,9 @@ VBlank1:: ; 1f4
 	ld [rIF], a
 
 	ei
-	ld a, BANK(_UpdateSound)
+	ld a, BANK(UpdateSound_)
 	rst Bankswitch
-	call _UpdateSound
+	call UpdateSound_
 	ld a, [wROMBankBackup]
 	rst Bankswitch
 	; enable ints
@@ -230,9 +230,9 @@ VBlank4:: ; 255
 
 	call AskSerial
 
-	ld a, BANK(_UpdateSound)
+	ld a, BANK(UpdateSound_)
 	rst Bankswitch
-	call _UpdateSound
+	call UpdateSound_
 
 	ld a, [wROMBankBackup]
 	rst Bankswitch
@@ -271,9 +271,9 @@ VBlank5:: ; 278
 	ld [rIF], a
 
 	ei
-	ld a, BANK(_UpdateSound)
+	ld a, BANK(UpdateSound_)
 	rst Bankswitch
-	call _UpdateSound
+	call UpdateSound_
 	ld a, [wROMBankBackup]
 	rst Bankswitch
 	di
@@ -291,9 +291,9 @@ VBlank2:: ; 2b0
 	ld a, [hROMBank]
 	ld [wROMBankBackup], a
 
-	ld a, BANK(_UpdateSound)
+	ld a, BANK(UpdateSound_)
 	rst Bankswitch
-	call _UpdateSound
+	call UpdateSound_
 
 	ld a, [wROMBankBackup]
 	rst Bankswitch
@@ -369,9 +369,9 @@ VBlank3:: ; 2c4
 	ld [rIF], a
 
 	ei
-	ld a, BANK(_UpdateSound)
+	ld a, BANK(UpdateSound_)
 	rst Bankswitch
-	call _UpdateSound
+	call UpdateSound_
 	ld a, [wROMBankBackup]
 	rst Bankswitch
 	di
diff --git a/main.asm b/main.asm
index 644bc4c9..a52d3fb6 100644
--- a/main.asm
+++ b/main.asm
@@ -365,16 +365,28 @@ SECTION "bank39", DATA, BANK[$39]
 	dr $e4000, $e8000
 
 SECTION "bank3a", DATA, BANK[$3a]
+DisableAudio_::
 	dr $e8000, $e805c
 
-_UpdateSound::
-	dr $e805c, $ec000
+UpdateSound_::
+	dr $e805c, $e8b30
+
+PlayMusic_::
+	dr $e8b30, $e8b79
+
+PlayCryHeader_::
+	dr $e8b79, $e8c04
+
+PlaySFX_::
+	dr $e8c04, $ec000
 
 SECTION "bank3b", DATA, BANK[$3b]
 	dr $ec000, $f0000
 
 SECTION "bank3c", DATA, BANK[$3c]
-	dr $f0000, $f4000
+	dr $f0000, $f2747
+CryHeaders::
+	dr $f2747, $f4000
 
 SECTION "bank3d", DATA, BANK[$3d]
 	dr $f4000, $f8000
diff --git a/wram.asm b/wram.asm
index f7f667d7..8673e7e1 100644
--- a/wram.asm
+++ b/wram.asm
@@ -3205,7 +3205,7 @@ wd67e:: ds 1 ; d67e
 wd67f:: ds 1 ; d67f
 wd680:: ds 1 ; d680
 wd681:: ds 1 ; d681
-wd682:: ds 1 ; d682
+wPlayerBikeSurfState:: ds 1 ; d682
 wd683:: ds 1 ; d683
 wd684:: ds 1 ; d684
 wd685:: ds 1 ; d685