ref: d8c6817279e415d6177b0548c0ad0994546ff104
dir: /home/init.asm/
SoftReset::
call StopAllSounds
call GBPalWhiteOut
ld c, 32
call DelayFrames
; fallthrough
Init::
; Program init.
DEF rLCDC_DEFAULT EQU %11100011
; * LCD enabled
; * Window tile map at $9C00
; * Window display enabled
; * BG and window tile data at $8800
; * BG tile map at $9800
; * 8x8 OBJ size
; * OBJ display enabled
; * BG display enabled
di
xor a
ldh [rIF], a
ldh [rIE], a
ldh [rSCX], a
ldh [rSCY], a
ldh [rSB], a
ldh [rSC], a
ldh [rWX], a
ldh [rWY], a
ldh [rTMA], a
ldh [rTAC], a
ldh [rBGP], a
ldh [rOBP0], a
ldh [rOBP1], a
ld a, rLCDC_ENABLE_MASK
ldh [rLCDC], a
call DisableLCD
ld sp, wStack
ld hl, WRAM0_Begin
ld bc, WRAM1_End - WRAM0_Begin
.loop
ld [hl], 0
inc hl
dec bc
ld a, b
or c
jr nz, .loop
call ClearVram
ld hl, HRAM_Begin
ld bc, HRAM_End - HRAM_Begin
call FillMemory
call ClearSprites
ld a, BANK(WriteDMACodeToHRAM)
ldh [hLoadedROMBank], a
ld [MBC1RomBank], a
call WriteDMACodeToHRAM
xor a
ldh [hTileAnimations], a
ldh [rSTAT], a
ldh [hSCX], a
ldh [hSCY], a
ldh [rIF], a
ld a, 1 << VBLANK + 1 << TIMER + 1 << SERIAL
ldh [rIE], a
ld a, 144 ; move the window off-screen
ldh [hWY], a
ldh [rWY], a
ld a, 7
ldh [rWX], a
ld a, CONNECTION_NOT_ESTABLISHED
ldh [hSerialConnectionStatus], a
ld h, HIGH(vBGMap0)
call ClearBgMap
ld h, HIGH(vBGMap1)
call ClearBgMap
ld a, rLCDC_DEFAULT
ldh [rLCDC], a
ld a, 16
ldh [hSoftReset], a
call StopAllSounds
ei
predef LoadSGB
ld a, BANK(SFX_Shooting_Star)
ld [wAudioROMBank], a
ld [wAudioSavedROMBank], a
ld a, $9c
ldh [hAutoBGTransferDest + 1], a
xor a
ldh [hAutoBGTransferDest], a
dec a
ld [wUpdateSpritesEnabled], a
predef PlayIntro
call DisableLCD
call ClearVram
call GBPalNormal
call ClearSprites
ld a, rLCDC_DEFAULT
ldh [rLCDC], a
jp SetDefaultNamesBeforeTitlescreen
ClearVram::
ld hl, VRAM_Begin
ld bc, VRAM_End - VRAM_Begin
xor a
jp FillMemory
StopAllSounds::
ld a, BANK("Audio Engine 1")
ld [wAudioROMBank], a
ld [wAudioSavedROMBank], a
xor a
ld [wAudioFadeOutControl], a
ld [wNewSoundID], a
ld [wLastMusicSoundID], a
dec a
jp PlaySound