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BizHawk
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NES - mapper 225 finished

This commit is contained in:
adelikat 2012-07-21 17:19:59 +00:00
parent 0a0763966c
commit 86e14410b7
2 changed files with 41 additions and 6 deletions
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1
BizHawk.Emulation/BizHawk.Emulation.csproj
View File

@ -173,6 +173,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper242.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper078.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper046.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper243.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper246.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper60.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper61.cs" />

46
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper225.cs
View File

@ -38,7 +38,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
CHR Setup:
---------------------------
$0000 $0400 $0800 $0C00 $1000 $1400 $1800 $1C00
$0000 $0400 $0800 $0C00 $1000 $1400 $1800 $1C00
+---------------------------------------------------------------+
CHR Mode 0: | $8000 |
+---------------------------------------------------------------+
@ -58,6 +58,8 @@ namespace BizHawk.Emulation.Consoles.Nintendo
bool prg_mode = false;
int chr_reg;
int prg_reg;
ByteBuffer eRAM = new ByteBuffer(4);
int chr_bank_mask_8k, prg_bank_mask_16k, prg_bank_mask_32k;
public override bool Configure(NES.EDetectionOrigin origin)
{
@ -68,6 +70,9 @@ namespace BizHawk.Emulation.Consoles.Nintendo
default:
return false;
}
chr_bank_mask_8k = Cart.chr_size / 8 - 1;
prg_bank_mask_16k = Cart.prg_size / 16 - 1;
prg_bank_mask_32k = Cart.prg_size / 32 - 1;
SetMirrorType(EMirrorType.Vertical);
@ -79,13 +84,20 @@ namespace BizHawk.Emulation.Consoles.Nintendo
ser.Sync("prg_reg", ref prg_reg);
ser.Sync("chr_reg", ref chr_reg);
ser.Sync("prg_mode", ref prg_mode);
ser.Sync("eRAM", ref eRAM);
base.SyncState(ser);
}
public override void Dispose()
{
eRAM.Dispose();
base.Dispose();
}
public override void WritePRG(int addr, byte value)
{
addr += 0x8000;
prg_mode = addr.Bit(12);
if (addr.Bit(13))
{
SetMirrorType(EMirrorType.Horizontal);
@ -94,6 +106,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
{
SetMirrorType(EMirrorType.Vertical);
}
int high = (addr & 0x4000) >> 8;
prg_reg = (addr >> 6) & 0x3F | high;
chr_reg = addr & 0x3F | high;
@ -101,13 +114,14 @@ namespace BizHawk.Emulation.Consoles.Nintendo
public override byte ReadPRG(int addr)
{
if (prg_mode)
if (prg_mode == false)
{
return ROM[((prg_reg >> 1) * 0x8000) + addr];
int bank = (prg_reg >> 1) & prg_bank_mask_32k;
return ROM[(bank * 0x8000) + addr];
}
else
{
return ROM[(prg_reg * 0x4000) + (addr & 0x3FFF)];
return ROM[((prg_reg & prg_bank_mask_16k) * 0x4000) + (addr & 0x3FFF)];
}
}
@ -115,9 +129,29 @@ namespace BizHawk.Emulation.Consoles.Nintendo
{
if (addr < 0x2000)
{
return VROM[(chr_reg * 0x2000) + addr];
return VROM[((chr_reg & chr_bank_mask_8k) * 0x2000) + addr];
}
return base.ReadPPU(addr);
}
public override void WriteEXP(int addr, byte value)
{
if (addr >= 0x1800)
{
eRAM[(addr & 0x07)] = (byte)(value & 0x0F);
}
}
public override byte ReadEXP(int addr)
{
if (addr >= 0x1800)
{
return eRAM[(addr & 0x07)];
}
else
{
return base.ReadEXP(addr);
}
}
}
}