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NES - start mapper 18

This commit is contained in:
adelikat 2012-07-29 22:40:57 +00:00
parent 31843f3e3a
commit 59ba7efdaf
2 changed files with 176 additions and 0 deletions
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1
BizHawk.Emulation/BizHawk.Emulation.csproj
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@ -148,6 +148,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\JALECO_JF_13.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\JALECO_JF_17.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\JALECO_JF_19.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\JALECO_SS8806.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper015.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper045.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper057.cs" />

175
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/JALECO_SS8806.cs Normal file
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@ -0,0 +1,175 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BizHawk.Emulation.Consoles.Nintendo
{
class JALECO_SS8806 : NES.NESBoardBase
{
//http://wiki.nesdev.com/w/index.php/INES_Mapper_018
ByteBuffer prg_banks_8k = new ByteBuffer(4);
ByteBuffer chr_banks_1k = new ByteBuffer(8);
int chr_bank_mask_1k, prg_bank_mask_8k;
public override bool Configure(NES.EDetectionOrigin origin)
{
//analyze board type
switch (Cart.board_type)
{
case "MAPPER018":
case "JALECO-JF-24": //TODO: there will be many boards to list here
break;
default:
return false;
}
chr_bank_mask_1k = Cart.chr_size / 1 - 1;
prg_bank_mask_8k = Cart.prg_size / 8 - 1;
prg_banks_8k[3] = 0xFF;
SetMirrorType(EMirrorType.Horizontal);
return true;
}
public override void SyncState(Serializer ser)
{
ser.Sync("prg_banks_8k", ref prg_banks_8k);
ser.Sync("prg_banks_8k", ref prg_banks_8k);
base.SyncState(ser);
}
public override void Dispose()
{
prg_banks_8k.Dispose();
chr_banks_1k.Dispose();
base.Dispose();
}
public override void WritePRG(int addr, byte value)
{
addr += 0x8000; //temporary
addr &= 0xF003;
switch (addr)
{
case 0x8000:
prg_banks_8k[0] |= (byte)(value & 0x0F);
break;
case 0x8001:
prg_banks_8k[0] |= (byte)((value & 0x0F) << 4);
break;
case 0x8002:
prg_banks_8k[1] |= (byte)(value & 0x0F);
break;
case 0x8003:
prg_banks_8k[1] |= (byte)((value & 0x0F) << 4);
break;
case 0x9000:
prg_banks_8k[2] |= (byte)(value & 0x0F);
break;
case 0x9001:
prg_banks_8k[2] |= (byte)((value & 0x0F) << 4);
break;
case 0xA000:
chr_banks_1k[0] |= (byte)(value & 0x0F);
break;
case 0xA001:
chr_banks_1k[0] |= (byte)((value & 0x0F) << 4);
break;
case 0xA002:
chr_banks_1k[1] |= (byte)(value & 0x0F);
break;
case 0xA003:
chr_banks_1k[1] |= (byte)((value & 0x0F) << 4);
break;
case 0xB000:
chr_banks_1k[2] |= (byte)(value & 0x0F);
break;
case 0xB001:
chr_banks_1k[2] |= (byte)((value & 0x0F) << 4);
break;
case 0xB002:
chr_banks_1k[3] |= (byte)(value & 0x0F);
break;
case 0xB003:
chr_banks_1k[3] |= (byte)((value & 0x0F) << 4);
break;
case 0xC000:
chr_banks_1k[4] |= (byte)(value & 0x0F);
break;
case 0xC001:
chr_banks_1k[4] |= (byte)((value & 0x0F) << 4);
break;
case 0xC002:
chr_banks_1k[5] |= (byte)(value & 0x0F);
break;
case 0xC003:
chr_banks_1k[5] |= (byte)((value & 0x0F) << 4);
break;
case 0xD000:
chr_banks_1k[6] |= (byte)(value & 0x0F);
break;
case 0xD001:
chr_banks_1k[6] |= (byte)((value & 0x0F) << 4);
break;
case 0xD002:
chr_banks_1k[7] |= (byte)(value & 0x0F);
break;
case 0xD003:
chr_banks_1k[7] |= (byte)((value & 0x0F) << 4);
break;
case 0xF002:
switch (value & 0x03)
{
case 0:
SetMirrorType(EMirrorType.Horizontal);
break;
case 1:
SetMirrorType(EMirrorType.Vertical);
break;
case 2:
SetMirrorType(EMirrorType.OneScreenA);
break;
case 3:
SetMirrorType(EMirrorType.OneScreenB);
break;
}
break;
}
}
public override byte ReadPRG(int addr)
{
int bank_8k = addr >> 13;
bank_8k = prg_banks_8k[bank_8k];
bank_8k &= prg_bank_mask_8k;
return ROM[(bank_8k * 0x2000) + (addr & 0x1FFF)];
}
private int MapCHR(int addr)
{
int bank_1k = addr >> 10;
bank_1k = chr_banks_1k[bank_1k];
bank_1k &= chr_bank_mask_1k;
addr = (bank_1k << 10) | (addr & 0x3FF);
return addr;
}
public override byte ReadPPU(int addr)
{
if (addr < 0x2000)
{
addr = MapCHR(addr);
if (VROM != null)
return VROM[addr];
else return VRAM[addr];
}
else return base.ReadPPU(addr);
}
}
}