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Fix Mapper 125

This commit is contained in:
alyosha-tas 2016-11-01 12:36:51 -04:00 committed by GitHub
parent 0afbe7771d
commit f2867643ac
1 changed files with 16 additions and 2 deletions
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18
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper125.cs
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@ -20,6 +20,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
return false;
}
SetMirrorType(Cart.pad_h, Cart.pad_v);
prg_bank_mask_8k = Cart.prg_size / 8 - 1;
return true;
}
@ -38,12 +40,24 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
}
}
public override void WritePRG(int addr, byte value)
{
if ((addr >= 0x4000) && (addr < 0x6000))
WRAM[addr - 0x4000] = value;
else
base.WritePRG(addr, value);
}
public override byte ReadPRG(int addr)
{
int bank = 0;
if (addr < 0x2000) { bank = prg_bank_mask_8k - 3; }
else if (addr < 0x4000) { bank = prg_bank_mask_8k - 2; }
else if (addr < 0x6000) { bank = prg_bank_mask_8k - 1; }
else if (addr < 0x4000) { bank = prg_bank_mask_8k - 2; }
// for some reason WRAM is mapped to here.
else if (addr < 0x6000)
{
return WRAM[addr - 0x4000];
}
else { bank = prg_bank_mask_8k; }
bank &= prg_bank_mask_8k;