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nes-fix mapper 200

This commit is contained in:
zeromus 2012-07-17 06:19:03 +00:00
parent 0a3a392285
commit 309d6b4e64
1 changed files with 11 additions and 8 deletions
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19
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper200.cs
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@ -45,8 +45,9 @@ namespace BizHawk.Emulation.Consoles.Nintendo
| $8000 | $8000 |
+---------------+---------------+
*/
int reg;
int prg_reg_16k, chr_reg_8k;
int prg_bank_mask_16k;
int chr_bank_mask_8k;
bool low;
public override bool Configure(NES.EDetectionOrigin origin)
{
@ -60,13 +61,15 @@ namespace BizHawk.Emulation.Consoles.Nintendo
}
prg_bank_mask_16k = Cart.prg_size / 16 - 1;
chr_bank_mask_8k = Cart.chr_size / 8 - 1;
return true;
}
public override void SyncState(Serializer ser)
{
ser.Sync("reg", ref reg);
ser.Sync("prg_reg_16k", ref prg_reg_16k);
ser.Sync("chr_reg_8k", ref chr_reg_8k);
base.SyncState(ser);
}
@ -80,20 +83,20 @@ namespace BizHawk.Emulation.Consoles.Nintendo
{
SetMirrorType(EMirrorType.Vertical);
}
reg = addr & 0x07;
low = addr.Bit(0);
int reg = addr & 0x07;
prg_reg_16k = reg & prg_bank_mask_16k;
chr_reg_8k = reg & chr_bank_mask_8k;
}
public override byte ReadPRG(int addr)
{
if (addr < 0x4000)
{
return ROM[(reg * 0x4000) + addr];
return ROM[(prg_reg_16k * 0x4000) + addr];
}
else
{
int bank = reg >> 1;
return ROM[(bank * 0x4000) + addr];
return ROM[(prg_reg_16k * 0x4000) + addr - 0x4000];
}
}
@ -101,7 +104,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
{
if (addr < 0x2000)
{
return VROM[(reg * 0x2000) + addr];
return VROM[(chr_reg_8k * 0x2000) + addr];
}
return base.ReadPPU(addr);
}