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NesHawk - implement board UNIF_BMC-A65AS

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adelikat 2015-08-22 11:17:11 -04:00
parent 2cb64fafb8
commit ce1ec1e766
2 changed files with 84 additions and 0 deletions
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1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -638,6 +638,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\TENGEN-800032.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\TENGEN_800008.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF-DREAMTECH01.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-A65AS.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-T-262.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\UxROM.cs">
<SubType>Code</SubType>

83
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-A65AS.cs Normal file
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using BizHawk.Common;
using BizHawk.Common.NumberExtensions;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public class UNIF_BMC_A65AS : NES.NESBoardBase
{
private int _prgReg;
private bool _isPrg32kMode;
private int prgMask16k;
private int prgMask32k;
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "UNIF_BMC-A65AS":
break;
default:
return false;
}
prgMask16k = Cart.prg_size / 16 - 1;
prgMask32k = Cart.prg_size / 32 - 1;
return true;
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("prgReg", ref _prgReg);
ser.Sync("isPrg32kMode", ref _isPrg32kMode);
}
public override void WritePRG(int addr, byte value)
{
_isPrg32kMode = value.Bit(6);
_prgReg = value;
// From FCEUX:
// actually, there is two cart in one... First have extra mirroring
// mode (one screen) and 32K bankswitching, second one have only
// 16 bankswitching mode and normal mirroring... But there is no any
// correlations between modes and they can be used in one mapper code.
if (value.Bit(7))
{
SetMirrorType(value.Bit(5) ? EMirrorType.OneScreenB : EMirrorType.OneScreenA);
}
else
{
SetMirrorType(value.Bit(3) ? EMirrorType.Horizontal : EMirrorType.Vertical);
}
}
public override byte ReadPRG(int addr)
{
if (_isPrg32kMode)
{
int bank = (_prgReg >> 1) & 0xF;
bank &= prgMask32k;
return ROM[(bank * 0x8000) + (addr & 0x7FFF)];
}
else
{
if (addr < 0x4000)
{
int bank = (_prgReg & 0x30) >> 1 | _prgReg & 7;
bank &= prgMask16k;
return ROM[(bank * 0x4000) + (addr & 0x3FFF)];
}
else
{
int bank = (_prgReg & 0x30) >> 1 | 7;
bank &= prgMask16k;
return ROM[(bank * 0x4000) + (addr & 0x3FFF)];
}
}
}
}
}