ShuriZma
/
BizHawk
mirror of https://github.com/TASEmulators/BizHawk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix TLSROM mapper 

Fix #848
This commit is contained in:
alyosha-tas 2017-05-19 17:22:39 -04:00 committed by GitHub
parent 43cb50d5c3
commit 05bf7e46d4
1 changed files with 73 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/TLSROM.cs
View File

@ -1,9 +1,15 @@
using System;
using BizHawk.Common;
using BizHawk.Common.NumberExtensions;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
//aka mapper 118
//wires the mapper outputs to control the nametables
public sealed class TLSROM : MMC3Board_Base
{
public int[] nametables = new int[4];
public override bool Configure(NES.EDetectionOrigin origin)
{
//analyze board type
@ -20,8 +26,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
AssertBattery(true);
break;
case "TENGEN-800037": //Alien Syndrome (U)
// this board is actually a RAMBO-1 (mapper064) with TLS-style rewiring
// but it seems to work fine here, so lets not worry about it
// this board is actually a RAMBO-1 (mapper064) with TLS-style rewiring
// but it seems to work fine here, so lets not worry about it
AssertPrg(128); AssertChr(128); AssertVram(0); AssertWram(0);
break;
case "MAPPER158":
@ -38,24 +44,86 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
BaseSetup();
SetMirrorType(EMirrorType.Vertical);
//maybe need other initialization
nametables[0] = 0;
nametables[1] = 1;
nametables[2] = 0;
nametables[3] = 1;
return true;
}
public override void WritePRG(int addr, byte value)
{
base.WritePRG(addr, value);
int nt = value >> 7;
if ((addr & 0x6001) == 0x1)
{
if (!mmc3.chr_mode)
{
switch (mmc3.reg_addr)
{
case 0:
nametables[0] = nt;
nametables[1] = nt;
break;
case 1:
nametables[2] = nt;
nametables[3] = nt;
break;
}
}
else
{
switch (mmc3.reg_addr)
{
case 2:
nametables[0] = nt;
break;
case 3:
nametables[1] = nt;
break;
case 4:
nametables[2] = nt;
break;
case 5:
nametables[3] = nt;
break;
}
}
}
if ((addr & 0x6001) != 0x2000)
base.WritePRG(addr, value);
}
public override byte ReadPPU(int addr)
{
if (addr < 0x2000) return base.ReadPPU(addr);
else return base.ReadPPU(RewireNametable_TLSROM(addr, 7));
else
{
int nt = ((addr - 0x2000) >> 10) & 0x3;
addr = 0x2000 + (addr & 0x3FF) + (nametables[nt] << 10);
return base.ReadPPU(addr);
}
}
public override void WritePPU(int addr, byte value)
{
if (addr < 0x2000) base.WritePPU(addr, value);
else base.WritePPU(RewireNametable_TLSROM(addr, 7), value);
else
{
int nt = ((addr - 0x2000) >> 10) & 0x3;
addr = 0x2000 + (addr & 0x3FF) + (nametables[nt] << 10);
base.WritePPU(addr, value);
}
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("nametables", ref nametables, false);
}
}
}