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nathanpc/VBlank.S

Created June 18, 2011 15:52
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Waiting For The VBlank Refresh At GameBoy Advance
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VBlank.S
ldr r0,=#0x4000006 @ VBlank memory address
waitVBlank:
ldrh r1, [r0] @ Loads the memory address to the r1 register
cmp r1, #161 @ Compare if the memory address have completed the VBlank
bne waitVBlank @ Loopback until r1 != 161
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