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NESHawk - Implement the Subor boards (mappers 166, 167)

This commit is contained in:
adelikat 2016-09-03 20:09:13 -04:00
parent 5e69a4fa45
commit 130837fdc0
2 changed files with 105 additions and 0 deletions
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1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -706,6 +706,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\Sachen8259.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\SachenSimple.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\SEEPROM.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Subor.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft1.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft1_Alt.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft2_m89.cs" />

104
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Subor.cs Normal file
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@ -0,0 +1,104 @@
using BizHawk.Common;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public sealed class Subor : NES.NESBoardBase
{
private ByteBuffer regs = new ByteBuffer(4);
private bool is167;
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "MAPPER166":
break;
case "MAPPER167":
is167 = true;
break;
default:
return false;
}
return true;
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("regs", ref regs);
ser.Sync("is167", ref is167);
}
public override void WritePRG(int addr, byte value)
{
regs[(addr >> 13) & 0x03] = value;
}
public override byte ReadPRG(int addr)
{
int basea, bank;
basea = ((regs[0] ^ regs[1]) & 0x10) << 1;
bank = (regs[2] ^ regs[3]) & 0x1f;
if ((regs[1] & 0x08) > 0)
{
bank &= 0xFE;
if (is167)
{
if (addr < 0x4000)
{
return ROM[((basea + bank + 1) * 0x4000) + (addr & 0x3FFF)];
}
else
{
return ROM[((basea + bank + 0) * 0x4000) + (addr & 0x3FFF)];
}
}
else
{
if (addr < 0x4000)
{
return ROM[((basea + bank + 0) * 0x4000) + (addr & 0x3FFF)];
}
else
{
return ROM[((basea + bank + 1) * 0x4000) + (addr & 0x3FFF)];
}
}
}
else
{
if ((regs[1] & 0x04) > 0)
{
if (addr < 0x4000)
{
return ROM[(0x1F * 0x4000) + (addr & 0x3FFF)];
}
else
{
return ROM[((basea + bank) * 0x4000) + (addr & 0x3FFF)];
}
}
else
{
if (addr < 0x4000)
{
return ROM[((basea + bank) * 0x4000) + (addr & 0x3FFF)];
}
else
{
if (is167)
{
return ROM[(0x20 * 0x4000) + (addr & 0x3FFF)];
}
else
{
return ROM[(0x07 * 0x4000) + (addr & 0x3FFF)];
}
}
}
}
}
}
}