blob: fe93e90d4dafa4929b478ad9aff62bafe88b313a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
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(wOAMBuffer)
ldh [rDMA], a
; wait for DMA to finish
ld a, $28
.wait
dec a
jr nz, .wait
ret
ENDL
DMARoutineEnd:
|
