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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, $c3
ld [$ff46], a
; wait for DMA to finish
ld a, $28
.wait dec a
jr nz, .wait
ret
DMARoutineEnd:
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