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Predef::
; Call predefined function a.
; To preserve other registers, have the
; destination call GetPredefRegisters.
; Save the predef id for GetPredefPointer.
ld [wPredefID], a
; A hack for LoadDestinationWarpPosition.
; See LoadTilesetHeader (predef $19).
ldh a, [hLoadedROMBank]
ld [wPredefParentBank], a
push af
ld a, BANK(GetPredefPointer)
ldh [hLoadedROMBank], a
ld [MBC1RomBank], a
call GetPredefPointer
ld a, [wPredefBank]
ldh [hLoadedROMBank], a
ld [MBC1RomBank], a
ld de, .done
push de
jp hl
.done
pop af
ldh [hLoadedROMBank], a
ld [MBC1RomBank], a
ret
GetPredefRegisters::
; Restore the contents of register pairs
; when GetPredefPointer was called.
ld a, [wPredefHL]
ld h, a
ld a, [wPredefHL + 1]
ld l, a
ld a, [wPredefDE]
ld d, a
ld a, [wPredefDE + 1]
ld e, a
ld a, [wPredefBC]
ld b, a
ld a, [wPredefBC + 1]
ld c, a
ret
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