From 6a570c89fcadefac31e6ab4d17d6cc1c9aeb95d3 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@zeromus.org>
Date: Wed, 21 Sep 2011 05:47:41 +0000
Subject: [PATCH] nes-fix a little bug in MMC2 and support MMC4 while i am at
 it

---
 BizHawk.Emulation/BizHawk.Emulation.csproj    |  3 +-
 .../Consoles/Nintendo/Docs/compatibility.txt  |  2 +-
 .../NES/Boards/{PxROM.cs => PxROM_FxROM.cs}   | 61 +++++++++++++++----
 BizHawk.Emulation/Database/Database.cs        |  4 +-
 BizHawk.MultiClient/AboutBox.Designer.cs      |  6 +-
 BizHawk.MultiClient/AboutBox.resx             |  4 +-
 BizHawk.MultiClient/MainForm.cs               |  2 +-
 BizHawk.MultiClient/output/gamedb.txt         |  1 +
 8 files changed, 60 insertions(+), 23 deletions(-)
 rename BizHawk.Emulation/Consoles/Nintendo/NES/Boards/{PxROM.cs => PxROM_FxROM.cs} (60%)

diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index e56b8b229e..0d505887f9 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -117,7 +117,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\NROM.cs">
       <SubType>Code</SubType>
     </Compile>
-    <Compile Include="Consoles\Nintendo\NES\Boards\PxROM.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\PxROM_FxROM.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft1.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft4.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\SxROM.cs">
@@ -312,6 +312,7 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
index 3bb03488ef..3bb1640e41 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
+++ b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
@@ -22,7 +22,7 @@ Open bus and bus conflict emulation is not considered complete or thorough in an
 005	ExRom=MMC5	Minimal
 007	AxROM		Good
 009	PxROM=MMC2	Complete
-010	MMC4		Needed (easy once 009 is done)
+010	MMC4		Complete
 011	Misc		Complete
 013	CPROM		Complete
 015	Multicart	Junk
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/PxROM.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/PxROM_FxROM.cs
similarity index 60%
rename from BizHawk.Emulation/Consoles/Nintendo/NES/Boards/PxROM.cs
rename to BizHawk.Emulation/Consoles/Nintendo/NES/Boards/PxROM_FxROM.cs
index 1eb2867ea5..16ba54aa92 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/PxROM.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/PxROM_FxROM.cs
@@ -4,13 +4,16 @@ using System.Diagnostics;
 
 namespace BizHawk.Emulation.Consoles.Nintendo
 {
-	//AKA MMC2 AKA Mike Tyson's Punch-Out!!
-	class PxROM : NES.NESBoardBase
+	//AKA MMC2 Mike Tyson's Punch-Out!!
+	//AKA MMC4 (similar enough to combine in one fle)
+	class PxROM_FxROM : NES.NESBoardBase
 	{
 		//configuration
 		int prg_bank_mask_8k, chr_bank_mask_4k;
+		bool mmc4;
 
 		//state
+		byte prg_reg;
 		IntBuffer prg_banks_8k = new IntBuffer(4);
 		IntBuffer chr_banks_4k = new IntBuffer(4);
 		IntBuffer chr_latches = new IntBuffer(2);
@@ -18,9 +21,12 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);
-			ser.Sync("prg_banks_8k", ref prg_banks_8k);
+			ser.Sync("prg_reg", ref prg_reg);
 			ser.Sync("chr_banks_4k", ref chr_banks_4k);
 			ser.Sync("chr_latches", ref chr_latches);
+
+			if (ser.IsReader)
+				SyncPRG();
 		}
 
 		public override void Dispose()
@@ -39,29 +45,54 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 				case "HVC-PEEOROM":
 					AssertPrg(128); AssertChr(128); AssertWram(0); AssertVram(0);
 					break;
+				
+				case "HVC-FKROM": //fire emblem
+					mmc4 = true;
+					AssertPrg(256); AssertChr(128); AssertWram(8); AssertVram(0);
+					break;
+				case "HVC-FJROM": //famicom wars
+					mmc4 = true;
+					AssertPrg(128); AssertChr(64); AssertWram(8); AssertVram(0);
+					break;
 
 				default:
 					return false;
 			}
 
+			
 			prg_bank_mask_8k = Cart.prg_size / 8 - 1;
 			chr_bank_mask_4k = Cart.chr_size / 4 - 1;
 
-			prg_banks_8k[0] = 0;
-			prg_banks_8k[1] = 0xFD & prg_bank_mask_8k;
-			prg_banks_8k[2] = 0xFE & prg_bank_mask_8k; ;
-			prg_banks_8k[3] = 0xFF & prg_bank_mask_8k; ;
+			SyncPRG();
 
 			return true;
 		}
 
+		void SyncPRG()
+		{
+			if (mmc4)
+			{
+				prg_banks_8k[0] = (prg_reg * 2) & prg_bank_mask_8k;
+				prg_banks_8k[1] = (prg_reg * 2 + 1) & prg_bank_mask_8k;
+				prg_banks_8k[2] = 0xFE & prg_bank_mask_8k;
+				prg_banks_8k[3] = 0xFF & prg_bank_mask_8k;
+			}
+			else
+			{
+				prg_banks_8k[0] = prg_reg & prg_bank_mask_8k;
+				prg_banks_8k[1] = 0xFD & prg_bank_mask_8k;
+				prg_banks_8k[2] = 0xFE & prg_bank_mask_8k;
+				prg_banks_8k[3] = 0xFF & prg_bank_mask_8k;
+			}
+		}
 
 		public override void WritePRG(int addr, byte value)
 		{
 			switch (addr & 0xF000)
 			{
 				case 0x2000: //$A000:      PRG Reg
-					prg_banks_8k[0] = value & prg_bank_mask_8k;
+					prg_reg = value;
+					SyncPRG();
 					break;
 				case 0x3000: //$B000:      CHR Reg 0A
 					chr_banks_4k[0] = value & chr_bank_mask_4k;
@@ -87,15 +118,19 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 			int tile = (addr>>4)&0xFF;
 			if (addr < 0x2000)
 			{
-				switch (tile)
-				{
-					case 0xFD: chr_latches[side] = 0; break;
-					case 0xFE: chr_latches[side] = 1; break;
-				}
 				int reg = side * 2 + chr_latches[side];
 				int ofs = addr & ((1 << 12) - 1);
 				int bank_4k = chr_banks_4k[reg];
 				addr = (bank_4k << 12) | ofs;
+
+				//if we're grabbing the second byte of the tile, then apply the tile switching logic
+				//(the next tile will be rendered with the fiddled register settings)
+				if ((addr & 0xF) >= 0x8)
+					switch (tile)
+					{
+						case 0xFD: chr_latches[side] = 0; break;
+						case 0xFE: chr_latches[side] = 1; break;
+					}
 				return VROM[addr];
 			}
 			else return base.ReadPPU(addr);
diff --git a/BizHawk.Emulation/Database/Database.cs b/BizHawk.Emulation/Database/Database.cs
index a3b091cb8d..f1407b28e2 100644
--- a/BizHawk.Emulation/Database/Database.cs
+++ b/BizHawk.Emulation/Database/Database.cs
@@ -29,8 +29,8 @@ namespace BizHawk
 		public static GameInfo CheckDatabase(string hash)
 		{
 		    CompactGameInfo cgi;
-			hash = RemoveHashType(hash);
-            db.TryGetValue(hash, out cgi);
+			string hash_notype = RemoveHashType(hash);
+			db.TryGetValue(hash_notype, out cgi);
             if (cgi == null)
             {
                 Console.WriteLine("Game with hash " + hash + " was not in game database.");
diff --git a/BizHawk.MultiClient/AboutBox.Designer.cs b/BizHawk.MultiClient/AboutBox.Designer.cs
index 4c309ffffc..c840a78415 100644
--- a/BizHawk.MultiClient/AboutBox.Designer.cs
+++ b/BizHawk.MultiClient/AboutBox.Designer.cs
@@ -82,11 +82,11 @@
 			// 
 			this.label3.AutoSize = true;
 			this.label3.Font = new System.Drawing.Font("Microsoft Sans Serif", 26.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
-			this.label3.Location = new System.Drawing.Point(216, 449);
+			this.label3.Location = new System.Drawing.Point(225, 449);
 			this.label3.Name = "label3";
-			this.label3.Size = new System.Drawing.Size(291, 39);
+			this.label3.Size = new System.Drawing.Size(311, 39);
 			this.label3.TabIndex = 3;
-			this.label3.Text = "COPYRITE 2001";
+			this.label3.Text = "COPYRITE 20011";
 			// 
 			// label4
 			// 
diff --git a/BizHawk.MultiClient/AboutBox.resx b/BizHawk.MultiClient/AboutBox.resx
index 3a5cb74968..3a38feba7b 100644
--- a/BizHawk.MultiClient/AboutBox.resx
+++ b/BizHawk.MultiClient/AboutBox.resx
@@ -2100,8 +2100,8 @@
   <data name="pictureBox3.Image" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
     <value>
         iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAYAAADDPmHLAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8
-        YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAAlwSFlzAAALAgAA
-        CwIBm8luNgAABQ5JREFUeF7tnbFyFDEMhpcur0FBR5FXgBI6OmjzDjSU3AvwEClT5jVSpqRNR8tRmWOY
+        YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAAlwSFlzAAAK+wAA
+        CvsBy58dkAAABQ5JREFUeF7tnbFyFDEMhpcur0FBR5FXgBI6OmjzDjSU3AvwEClT5jVSpqRNR8tRmWOY
         YWw5WOes7Ei7X2ZcZPZWln99t5K93r1l4Q8FUAAFUAAFUAAFUAAFUAAFUAAFUAAFUAAFUAAFUAAFUAAF
         UAAFUAAFUAAFUAAFUAAFUAAFUAAFUAAF5iiQTt1Ytjle04uZApbB/2OLv2AKAECwgFm7CwDWijq3Vwb8
         9j4trXa4TkujvXlIKW/G9cRjcDqX1797AOA/RkM9BICh8vo3DgD+YzTUw2bRd7xfUqs93Cwpb7I+kDXB
diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index 75faf8ea5f..0eaa870ca9 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -965,7 +965,7 @@ namespace BizHawk.MultiClient
 					}
 					else if (file.Extension.ToLower() == ".cue")
 					{
-						Disc disc = Disc.FromCuePath(path);
+						Disc disc = Disc.FromCuePath(path, Progression.Progress.BeginTaskNull());
 						var hash = disc.GetHash();
 						game = Database.CheckDatabase(hash);
 						if (game == null)
diff --git a/BizHawk.MultiClient/output/gamedb.txt b/BizHawk.MultiClient/output/gamedb.txt
index 695d3118ae..847cbd5f72 100644
--- a/BizHawk.MultiClient/output/gamedb.txt
+++ b/BizHawk.MultiClient/output/gamedb.txt
@@ -58,6 +58,7 @@ sha1:91CECCFCAC90E417E9AEE80E8F7B560A20EB33CC		Ai Sensei No Oshiete - Watashi No
 sha1:B6F6BD9D78CDD264A117D4B647AEE3309993E9A9		Mike Tyson's Punch-Out!! (U)	NES		board=NES-PNROM;PRG=128;CHR=128;WRAM=0
 sha1:A0C4D4172A0037B7D9BA729A93E809978D0F10D2		Punch-Out!! (U)	NES		board=NES-PNROM;PRG=128;CHR=128;WRAM=0
 sha1:D7E199373162966F3971D4C02EF2A03A13FE82D3		Tetris (U)	NES		board=SxROM-JUNK;PRG=32;CHR=128;WRAM=0;VRAM=0
+sha1:3F406EA2E41B5E725BB8DF31481D23F3CF6F1DBE		Famicom Wars (J)	NES		board=HVC-FJROM;PRG=128;CHR=64;WRAM=8;VRAM=0
 
 ;and these are even labeled as bad in goodNES
 sha1:984ADAEB85403EEF1BA85CDCF310FAAECEB409A0	B	Adventures of Captain Comic, The (Bad Dump) (U)	NES		board=COLORDREAMS-74*377;PRG=64;CHR=64;WRAM=0;VRAM=0