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patch up additional registers that don't read open bus

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this makes all mgba suite io tests pass
This commit is contained in:
Matthew Berry 2022-10-27 09:10:37 -07:00
parent 2fe794edba
commit 30f6597676
1 changed files with 6 additions and 3 deletions
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9
src/crab/gba/mmio.cr
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@ -12,7 +12,7 @@ module GBA
when 0x060..0x0A7 then @gba.apu[io_addr]
when 0x0B0..0x0DF then @gba.dma[io_addr]
when 0x100..0x10F then @gba.timer[io_addr]
when 0x120..0x12B, 0x134..0x159 # todo: serial
when 0x120..0x12B, 0x134..0x15B # todo: serial
if io_addr == 0x135
0x80_u8
else
@ -22,7 +22,10 @@ module GBA
when 0x200..0x203,
0x208..0x209 then @gba.interrupts[io_addr]
when 0x204..0x205 then @waitcnt.read_byte(io_addr & 1)
else @gba.bus.read_open_bus_value(io_addr)
when 0x206..0x207,
0x20A..0x20B,
0x302..0x303 then 0_u8 # do not read open bus
else @gba.bus.read_open_bus_value(io_addr)
end
end
@ -33,7 +36,7 @@ module GBA
when 0x060..0x0A7 then @gba.apu[io_addr] = value
when 0x0B0..0x0DF then @gba.dma[io_addr] = value
when 0x100..0x10F then @gba.timer[io_addr] = value
when 0x120..0x12B, 0x134..0x159 # todo: serial
when 0x120..0x12B, 0x134..0x15B # todo: serial
when 0x130..0x133 then @gba.keypad[io_addr] = value
when 0x200..0x203,
0x208..0x209 then @gba.interrupts[io_addr] = value