nes-add mapper 227

BizHawk.Emulation/BizHawk.Emulation.csproj

@@ -140,6 +140,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper164.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper180.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper193.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\Mapper227.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper240.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper242.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper078.cs" />

BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt

@@ -113,7 +113,7 @@ Open bus and bus conflict emulation is not considered complete or thorough in an
 210	Namcot		Decent {{See 019}}
 225	Multicart	Junk
 226	Multicart	Junk
-227	Multicart	Junk
+227	Multicart	Decebt
 228	Unlicensed	Nothing
 230	Multicart	Junk
 231	Multicart	Junk

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper227.cs

@@ -0,0 +1,121 @@
+using System;
+using System.IO;
+using System.Diagnostics;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	class Mapper227 : NES.NESBoardBase
+	{
+		//configuration
+		int prg_bank_mask_16k;
+
+		//state
+		int prg;
+		bool vram_protected;
+		ByteBuffer prg_banks_16k = new ByteBuffer(2);
+
+		//1200-in-1
+		//[NJXXX] Xiang Shuai Chuan Qi
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			//configure
+			switch (Cart.board_type)
+			{
+				case "MAPPER227":
+					//AssertVram(16);
+					Cart.vram_size = 16;
+					break;
+				default:
+					return false;
+			}
+			prg_bank_mask_16k = (Cart.prg_size / 16) - 1;
+
+			SetMirrorType(EMirrorType.Vertical);
+			vram_protected = false;
+			prg_banks_16k[0] = prg_banks_16k[1] = 0;
+			return true;
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			int bank_16k = addr >> 14;
+			int ofs = addr & ((1 << 14) - 1);
+			bank_16k = prg_banks_16k[bank_16k];
+			bank_16k &= prg_bank_mask_16k;
+			addr = (bank_16k << 14) | ofs;
+			return ROM[addr];
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			bool S = addr.Bit(0);
+			bool M_horz = addr.Bit(1);
+			int p = (addr >> 2) & 0x1F;
+			p += addr.Bit(8) ? 0x20 : 0;
+			bool o = addr.Bit(7);
+			bool L = addr.Bit(9);
+
+			//virtuaNES doesnt do this.
+			//fceux does it...
+			//if we do it, [NJXXX] Xiang Shuai Chuan Qi will not be able to set any patterns
+			//maybe only the multicarts do it, to keep the game from clobbering vram on accident
+			//vram_protected = o;
+
+			if (o == true && S == false)	
+			{
+				prg_banks_16k[0] = (byte)(p);
+				prg_banks_16k[1] = (byte)(p);
+			}
+			if (o == true && S == true)
+			{
+				prg_banks_16k[0] = (byte)((p & ~1));
+				prg_banks_16k[1] = (byte)((p & ~1) + 1);
+			}
+			if (o == false && S == false && L == false)
+			{
+				prg_banks_16k[0] = (byte)p;
+				prg_banks_16k[1] = (byte)(p & 0x38);
+			}
+			if (o == false && S == true && L == false)
+			{
+				prg_banks_16k[0] = (byte)(p & 0x3E);
+				prg_banks_16k[1] = (byte)(p & 0x38);
+			}
+			if (o == false && S == false && L == true)
+			{
+				prg_banks_16k[0] = (byte)p;
+				prg_banks_16k[1] = (byte)(p | 0x07);
+			}
+			if (o == false && S == true && L == true)
+			{
+				prg_banks_16k[0] = (byte)(p & 0x3E);
+				prg_banks_16k[1] = (byte)(p | 0x07);
+			}
+
+			prg_banks_16k[0] = (byte)(prg_banks_16k[0]&prg_bank_mask_16k);
+			prg_banks_16k[1] = (byte)(prg_banks_16k[1]&prg_bank_mask_16k);
+
+			if (M_horz) SetMirrorType(EMirrorType.Horizontal);
+			else SetMirrorType(EMirrorType.Vertical);
+		}
+
+
+		public override void WritePPU(int addr, byte value)
+		{
+			if (addr < 0x2000)
+			{
+				if (vram_protected) 
+					return;
+				else base.WritePPU(addr, value);
+			}
+			else base.WritePPU(addr, value);
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("prg", ref prg);
+		}
+	}
+}

BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs

@@ -114,6 +114,7 @@ static string ClassifyTable = @"
 191	-1	-1	-1	-1	MAPPER191
 193	-1	-1	-1	-1	MAPPER193
 210	-1	-1	-1	-1	MAPPER210
+227	-1	-1	-1	-1	MAPPER227
 232	-1	-1	-1	-1	MAPPER232
 240	-1	-1	-1	-1	MAPPER240
 242	-1	-1	-1	-1	MAPPER242

BizHawk.Emulation/Database/Database.cs

@@ -82,6 +82,7 @@ namespace BizHawk
 							case "I": Game.Status = RomStatus.BIOS; break;
 							case "D": Game.Status = RomStatus.Homebrew; break;
 							case "H": Game.Status = RomStatus.Hack; break;
+							case "U": Game.Status = RomStatus.Unknown; break;
 							default: Game.Status = RomStatus.GoodDump; break;
 						}
 						Game.Name = items[2];

BizHawk.Emulation/Database/GameInfo.cs

@@ -10,6 +10,7 @@ namespace BizHawk
 		Homebrew,
 		TranslatedRom,
 		Hack,
+		Unknown,
 		BIOS,
 		Overdump,
 		NotInDatabase
@@ -17,6 +18,11 @@ namespace BizHawk
 
 	public class GameInfo
 	{
+		public bool IsRomStatusBad()
+		{
+			return Status == RomStatus.BadDump || Status == RomStatus.Overdump;
+		}
+
 		public string Name;
 		public string System;
 		public string Hash;