shithub: pokered

ref: 01095f77943b9a7fd0432a6ad2e5c18f2d3e66ae
dir: /engine/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, $ff80 % $100
	ld b, DMARoutineEnd - DMARoutine
	ld hl, DMARoutine
.copy
	ld a, [hli]
	ld [$ff00+c], a
	inc c
	dec b
	jr nz, .copy
	ret

DMARoutine:
	; initiate DMA
	ld a, wOAMBuffer / $100
	ld [$ff46], a

	; wait for DMA to finish
	ld a, $28
.wait	dec a
	jr nz, .wait
	ret
DMARoutineEnd: