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update dma unmapped reads

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This commit is contained in:
Matthew Berry 2022-08-16 14:18:42 -07:00
parent 4505072049
commit 7c45654b16
1 changed files with 3 additions and 3 deletions
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6
src/crab/gba/dma.cr
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@ -47,11 +47,11 @@ module GBA
reg = (io_addr - 0xB0) % 12
case reg
when 0, 1, 2, 3 # dmasad
(@dmasad[channel] >> 8 * reg).to_u8!
0_u8 # todo: OOB read
when 4, 5, 6, 7 # dmadad
(@dmadad[channel] >> 8 * (reg - 4)).to_u8!
0_u8 # todo: OOB read
when 8, 9 # dmacnt_l
(@dmacnt_l[channel] >> 8 * (reg - 8)).to_u8!
0_u8 # write-only
when 10, 11 # dmacnt_h
(@dmacnt_h[channel].value >> 8 * (reg - 10)).to_u8!
else abort "Unmapped DMA read ~ addr:#{hex_str io_addr.to_u8}"