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NESHawk - implement mapper 186, another real gem

This commit is contained in:
adelikat 2016-09-11 13:00:30 -04:00
parent 4b115ec2c3
commit 3f0d9fc397
2 changed files with 79 additions and 0 deletions
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1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -626,6 +626,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper177.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper178.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper180.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper186.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper188.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper193.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper200.cs" />

78
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper186.cs Normal file
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@ -0,0 +1,78 @@
using BizHawk.Common;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public class Mapper186 : NES.NESBoardBase
{
private ByteBuffer _SRAM = new ByteBuffer(3072);
private ByteBuffer regs = new ByteBuffer(4);
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "MAPPER186":
break;
default:
return false;
}
return true;
}
public override byte ReadPRG(int addr)
{
if (addr < 0x4000)
{
return ROM[(regs[1] << 14) + (addr & 0x3FFF)];
}
// C000-FFFF is always bank 0
return ROM[addr & 0x3FFF];
}
public override byte ReadWRAM(int addr)
{
return ROM[(regs[0] >> 6) + addr];
}
public override void WriteEXP(int addr, byte value)
{
if (addr >= 0x200 && addr < 0x400)
{
if (((addr + 0x4000) & 0x4203) > 0)
{
regs[addr & 3] = value;
}
}
else if (addr < 0x1000)
{
_SRAM[addr - 0x400] = value;
}
else
{
base.WriteEXP(addr, value);
}
}
public override byte ReadEXP(int addr)
{
if (addr >= 0x200 && addr < 0x400)
{
switch (addr + 0x4000)
{
case 0x4200: return 0x00;
case 0x4201: return 0x00;
case 0x4202: return 0x40;
case 0x4203: return 0x00;
}
}
else if (addr < 0x1000)
{
return _SRAM[addr - 0x400];
}
return base.ReadEXP(addr);
}
}
}