pokecrystal-board/engine/gfx/load_push_oam.asm

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WriteOAMDMACodeToHRAM::
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ld c, hTransferVirtualOAM - $ff00
ld b, .PushOAMEnd - .PushOAM
ld hl, .PushOAM
.loop
ld a, [hli]
ld [$ff00+c], a
inc c
dec b
jr nz, .loop
ret
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.PushOAM:
ld a, HIGH(wVirtualOAM)
ld [rDMA], a
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ld a, NUM_SPRITE_OAM_STRUCTS
.pushoam_loop
dec a
jr nz, .pushoam_loop
ret
.PushOAMEnd