Start mapper 226

BizHawk.Emulation/BizHawk.Emulation.csproj

@@ -158,6 +158,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper193.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper200.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper207.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\Mapper226.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper227.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper230.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper231.cs" />

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper226.cs

@@ -0,0 +1,108 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	class Mapper226 : NES.NESBoardBase
+	{
+		/*
+		 *  Here are Disch's original notes:  
+		 ========================
+		 =  Mapper 226          =
+		 ========================
+ 
+		 Example Games:
+		 --------------------------
+		 76-in-1
+		 Super 42-in-1
+ 
+ 
+		 Registers:
+		 ---------------------------
+ 
+		 Range, Mask:  $8000-FFFF, $8001
+ 
+		   $8000:  [PMOP PPPP]
+			  P = Low 6 bits of PRG Reg
+			  M = Mirroring (0=Horz, 1=Vert)
+			  O = PRG Mode
+ 
+		   $8001:  [.... ...H]
+			  H = high bit of PRG
+ 
+ 
+		 PRG Setup:
+		 ---------------------------
+ 
+		 Low 6 bits of the PRG Reg come from $8000, high bit comes from $8001
+ 
+ 
+						$8000   $A000   $C000   $E000  
+					  +-------------------------------+
+		 PRG Mode 0:  |             <Reg>             |
+					  +-------------------------------+
+		 PRG Mode 1:  |      Reg      |      Reg      |
+					  +---------------+---------------+
+		*/
+
+		public int prg_page;
+		public bool prg_mode;
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "MAPPER226":
+					break;
+				default:
+					return false;
+			}
+
+			prg_mode = false;
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			ser.Sync("prg_page", ref prg_page);
+			ser.Sync("prg_mode", ref prg_mode);
+			base.SyncState(ser);
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			if (addr == 0)
+			{
+				prg_page = (value & 0x1F) + (value >> 7 << 5);
+				prg_mode = value.Bit(5);
+
+				if (value.Bit(6))
+				{
+					SetMirrorType(EMirrorType.Vertical);
+				}
+				else
+				{
+					SetMirrorType(EMirrorType.Horizontal);
+				}
+			}
+			else
+			{
+				prg_page += (value & 0x1) << 7;
+			}
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			if (prg_mode == false)
+			{
+				return ROM[((prg_page >> 1) * 0x8000) + addr];
+			}
+			else
+			{
+				return ROM[(prg_page * 0x4000) + (addr & 0x03FFF)];
+			}
+		}
+	}
+}