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update MMC1 for VS Dr. Mario

This commit is contained in:
alyosha-tas 2016-11-08 20:05:02 -05:00 committed by GitHub
parent d123709a72
commit 312bacf2f3
1 changed files with 63 additions and 5 deletions
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68
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
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@ -71,7 +71,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
A, B1, B2, B3
}
//register 0:
public int chr_mode;
public int prg_mode;
@ -249,6 +248,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
const int pputimeout = 4; // i don't know if this is right, but anything lower will not boot Bill & Ted
bool disablemirror = false; // mapper 171: mmc1 without mirroring control
//the VS actually does have 2 KB of nametable address space
//let's make the extra space here, instead of in the main NES to avoid confusion
byte[] CIRAM_VS = new byte[0x800];
//state
public MMC1 mmc1;
/// <summary>number of cycles since last WritePRG()</summary>
@ -294,12 +299,49 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
return VRAM[Gen_CHR_Address(addr) & vram_mask];
else return VROM[Gen_CHR_Address(addr)];
}
else return base.ReadPPU(addr);
}
else
{
if (NES._isVS)
{
addr = addr - 0x2000;
if (addr < 0x800)
{
return NES.CIRAM[addr];
}
else
{
return CIRAM_VS[addr - 0x800];
}
}
else
return base.ReadPPU(addr);
}
}
public override void WritePPU(int addr, byte value)
{
if (addr < 0x2000)
if (NES._isVS)
{
if (addr < 0x2000)
{
if (VRAM != null)
VRAM[Gen_CHR_Address(addr) & vram_mask] = value;
}
else
{
addr = addr - 0x2000;
if (addr < 0x800)
{
NES.CIRAM[addr] = value;
}
else
{
CIRAM_VS[addr - 0x800] = value;
}
}
}
else if (addr < 0x2000)
{
if (Cart.vram_size != 0)
VRAM[Gen_CHR_Address(addr) & vram_mask] = value;
@ -312,6 +354,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
base.SyncState(ser);
mmc1.SyncState(ser);
ser.Sync("ppuclock", ref ppuclock);
if (NES._isVS)
ser.Sync("VS_CIRAM", ref CIRAM_VS, false);
}
public override bool Configure(NES.EDetectionOrigin origin)
@ -320,6 +365,20 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
case "MAPPER116_HACKY":
break;
case "MAPPER001_VS":
// VS mapper MMC1
NES._isVS = true;
//update the state of the dip switches
//this is only done at power on
NES.VS_dips[0] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[1] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[2] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[3] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[4] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[5] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[6] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
NES.VS_dips[7] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
break;
case "MAPPER001":
// there's no way to define PRG oversize for mapper001 due to how the MMC1 regs work
// so 512KB must mean SUROM or SXROM. SUROM is more common, so we try that
@ -445,7 +504,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
base.Dispose();
if(mmc1 != null) mmc1.Dispose();
}
} //class SxROM