shithub: pokered

ref: 4c6a58ee21326ff8249914704ba6043b8b9af239
dir: /engine/gfx/oam_dma.asm/

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WriteDMACodeToHRAM::
; Since no other memory is available during OAM DMA,
; DMARoutine is copied to HRAM and executed there.
	ld c, LOW(hDMARoutine)
	ld b, DMARoutineEnd - DMARoutine
	ld hl, DMARoutine
.copy
	ld a, [hli]
	ldh [c], a
	inc c
	dec b
	jr nz, .copy
	ret

DMARoutine:
LOAD "OAM DMA", HRAM
hDMARoutine::
	; initiate DMA
	ld a, HIGH(wShadowOAM)
	ldh [rDMA], a
	; wait for DMA to finish
	ld a, $28
.wait
	dec a
	jr nz, .wait
	ret
ENDL
DMARoutineEnd: