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add mapper 165: mmc3 variant. Fire Emblem (Pirate). Some graphical glitches.

This commit is contained in:
goyuken 2012-10-14 18:34:15 +00:00
parent 5661205bda
commit 5125f43854
2 changed files with 81 additions and 0 deletions
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1
BizHawk.Emulation/BizHawk.Emulation.csproj
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@ -201,6 +201,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper052.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper074.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper115.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper165.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper182.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper189.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper191.cs" />

80
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper165.cs Normal file
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@ -0,0 +1,80 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BizHawk.Emulation.Consoles.Nintendo
{
// Fire Emblem (Ch)
// mmc3 with mmc2-style chr swapping
// seem to be some graphical glitches...
public class Mapper165 : MMC3Board_Base
{
bool latch0 = false;
bool latch1 = false;
int real_chr_mask;
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "MAPPER165":
break;
default:
return false;
}
Cart.vram_size = 4;
real_chr_mask = Cart.chr_size / 4 - 1;
BaseSetup();
return true;
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("latch0", ref latch0);
ser.Sync("latch1", ref latch1);
}
public override byte ReadPPU(int addr)
{
byte ret;
if (addr < 0x2000)
{
int bank = mmc3.regs[addr < 0x1000 ? latch0 ? 1 : 0 : latch1 ? 4 : 2];
if (bank == 0)
ret = VRAM[addr & 0xfff];
else
ret = VROM[(addr & 0xfff) + (((bank >> 2) & real_chr_mask) << 12)];
}
else
ret = base.ReadPPU(addr);
// latch processes for the next read
switch (addr & 0x3ff0)
{
case 0x0fd0: latch0 = false; break;
case 0x0fe0: latch0 = true; break;
case 0x1fd0: latch1 = false; break;
case 0x1fe0: latch1 = true; break;
}
return ret;
}
public override void WritePPU(int addr, byte value)
{
if (addr < 0x2000)
{
int bank = mmc3.regs[addr < 0x1000 ? latch0 ? 1 : 0 : latch1 ? 4 : 2];
if (bank == 0)
VRAM[addr & 0xfff] = value;
}
else
base.WritePPU(addr, value);
}
}
}