VBlank:: push af push bc push de push hl ld a, [rVBK] ; vram bank push af xor a ld [rVBK], a ; reset vram bank to 0 ld a, [H_LOADEDROMBANK] ld [wd122], a ld a, [hSCX] ld [rSCX], a ld a, [hSCY] ld [rSCY], a ld a, [wd0a0] and a jr nz, .ok ld a, [hWY] ld [rWY], a .ok call AutoBgMapTransfer call VBlankCopyBgMap call RedrawExposedScreenEdge call VBlankCopy call VBlankCopyDouble call UpdateMovingBgTiles call $ff80 ; hOAMDMA ld a, Bank(PrepareOAMData) ld [H_LOADEDROMBANK], a ld [MBC1RomBank], a call PrepareOAMData ; VBlank-sensitive operations end. call TrackPlayTime ; keep track of time played call Random call ReadJoypad ld a, [H_VBLANKOCCURRED] and a jr z, .vblanked xor a ld [H_VBLANKOCCURRED], a .vblanked ld a, [H_FRAMECOUNTER] and a jr z, .decced dec a ld [H_FRAMECOUNTER], a .decced call Func_28cb ld a, $8 call BankswitchCommon call Music_DoLowHealthAlarm ld a, $2 call BankswitchCommon call Music2_UpdateMusic call SerialFunction ; add this ld a, [wd122] ld [H_LOADEDROMBANK], a ld [MBC1RomBank], a pop af ld [rVBK],a pop hl pop de pop bc pop af reti DelayFrame:: ; Wait for the next vblank interrupt. ; As a bonus, this saves battery. NOT_VBLANKED EQU 1 ld a, NOT_VBLANKED ld [H_VBLANKOCCURRED], a .halt halt ld a, [H_VBLANKOCCURRED] and a jr nz, .halt ret