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

nes: move namcot175&340 to their own class, and change a few things. fixes bad mirroring in some games

This commit is contained in:
goyuken 2014-02-02 16:23:35 +00:00
parent 7a22757ca8
commit 99af51b883
3 changed files with 140 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
View File

@ -346,6 +346,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\TLSROM.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\TVROM.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\TxROM.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Namcot175_340.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\DRROM.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\Mapper076.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\Mapper088.cs" />

2
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/NAMCOT_m19_m210.cs
View File

@ -77,6 +77,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
audio = new Namco163Audio(NES.apu.ExternalQueue);
break;
/*
//mapper 210:
case "NAMCOT-175":
//wagyan land 2
@ -89,6 +90,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
//famista '92
AssertPrg(128,256,512); AssertChr(128,256); AssertVram(0); AssertWram(0,8);
break;
*/
default:
return false;
}

137
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Namcot175_340.cs Normal file
View File

@ -0,0 +1,137 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BizHawk.Common;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public class Namcot175_340 : NES.NESBoardBase
{
/*
* Namcot 175 and 340. Simpler versions of the 129/163. Differences:
* No IRQs.
* No extended ciram control:
* PPU $0000:$1FFF is always CHRROM.
* PPU $2000:$2FFF is always CIRAM.
* No sound.
* Mirroring varies by type:
* 175: Hardwired mirroring (H/V)
* 340: Simple mirroring control through $E000.
*
* Nesdev mentions that the 340 has no WRAM, but that's because no games
* on the 340 ever used it. (In fact, only 1 (?) 175 game has wram).
* In any event, WRAM write protect is different than on 129/163.
*
* This should be mapper 210, with mapper 19 being 129/163, but you know how
* mapper numbers are. To complicate things, some 175/340 games run correctly
* on a 163 because they make compatibility writes to both sets of mirroring regs.
*/
// config
int prg_bank_mask_8k;
int chr_bank_mask_1k;
bool enablemirror;
// state
int[] prg = new int[4];
int[] chr = new int[8];
bool wramenable;
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "NAMCOT-175":
//wagyan land 2
//splatter house
SetMirrorType(Cart.pad_h, Cart.pad_v);
break;
case "NAMCOT-340":
//family circuit '91
//dream master
//famista '92
enablemirror = true;
break;
case "MAPPER210":
// not sure what to do here because the popular public collection
// has nothing in mapper 210 except some mortal kombat pirate cart
enablemirror = true;
SetMirrorType(Cart.pad_h, Cart.pad_v);
break;
default:
return false;
}
AssertPrg(64, 128, 256, 512);
AssertChr(64, 128, 256);
AssertVram(0);
prg_bank_mask_8k = Cart.prg_size / 8 - 1;
chr_bank_mask_1k = Cart.chr_size / 1 - 1;
prg[3] = prg_bank_mask_8k;
return true;
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("prg", ref prg, false);
ser.Sync("chr", ref chr, false);
ser.Sync("wramenable", ref wramenable);
}
public override void WritePRG(int addr, byte value)
{
switch (addr & 0x7800)
{
case 0x0000: chr[0] = value & chr_bank_mask_1k; break;
case 0x0800: chr[1] = value & chr_bank_mask_1k; break;
case 0x1000: chr[2] = value & chr_bank_mask_1k; break;
case 0x1800: chr[3] = value & chr_bank_mask_1k; break;
case 0x2000: chr[4] = value & chr_bank_mask_1k; break;
case 0x2800: chr[5] = value & chr_bank_mask_1k; break;
case 0x3000: chr[6] = value & chr_bank_mask_1k; break;
case 0x3800: chr[7] = value & chr_bank_mask_1k; break;
case 0x4000: wramenable = value.Bit(0); break;
case 0x4800: break;
case 0x5000: break;
case 0x5800: break;
case 0x6000: prg[0] = value & 63 & prg_bank_mask_8k; SyncMirror(value); break;
case 0x6800: prg[1] = value & 63 & prg_bank_mask_8k; break;
case 0x7000: prg[2] = value & 63 & prg_bank_mask_8k; break;
case 0x7800: break;
}
}
void SyncMirror(byte value)
{
if (enablemirror)
{
switch (value & 0xc0)
{
case 0x00: SetMirrorType(EMirrorType.OneScreenA); break;
case 0x40: SetMirrorType(EMirrorType.Vertical); break;
case 0x80: SetMirrorType(EMirrorType.Horizontal); break;
case 0xc0: SetMirrorType(EMirrorType.OneScreenB); break;
}
}
}
public override byte ReadPPU(int addr)
{
if (addr < 0x2000)
{
return VROM[addr & 0x3ff | chr[addr >> 10] << 10];
}
else
{
return base.ReadPPU(addr);
}
}
public override byte ReadPRG(int addr)
{
return ROM[addr & 0x1fff | prg[addr >> 13] << 13];
}
}
}