NES - Implement mapper 62

BizHawk.Emulation/BizHawk.Emulation.csproj

@@ -172,6 +172,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper046.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper246.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper60.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\Mapper62.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\HKROM.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper012.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper044.cs" />

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper233.cs

@@ -42,12 +42,12 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 		PRG Setup:
 		---------------------------
 
-			$8000   $A000   $C000   $E000  
-			+-------------------------------+
+					  $8000   $A000   $C000   $E000  
+					+-------------------------------+
 		PRG Mode 0: |            <$8000>            |
-			+-------------------------------+
+					+-------------------------------+
 		PRG Mode 1: |     $8000     |     $8000     |
-			+---------------+---------------+
+					+---------------+---------------+
 
 
 		Mirroring:
@@ -120,7 +120,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 			}
 			else
 			{
-				return ROM[(prg_page * 0x4000) + (addr & 0x03FFF)];
+				return ROM[(prg_page * 0x4000) + (addr & 0x3FFF)];
 			}
 		}
 	}

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper62.cs

@@ -0,0 +1,114 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	class Mapper62 : NES.NESBoardBase
+	{
+		/*
+			Here are Disch's original notes:  
+		========================
+		=  Mapper 062          =
+		========================
+
+		Example Game:
+		--------------------------
+		Super 700-in-1
+
+
+		Registers:
+		---------------------------
+
+		$8000-FFFF:  A~[..pp pppp MPOC CCCC]
+					[.... ..cc]
+		p = Low bits of PRG Reg
+		P = High bit of PRG Reg
+		c = Low bits of CHR Reg
+		C = High bits of CHR Reg
+		O = PRG Mode
+		M = Mirroring (0=Vert, 1=Horz)
+
+
+		PRG Setup:
+		---------------------------
+
+
+					  $8000   $A000   $C000   $E000  
+					+-------------------------------+
+		PRG Mode 0: |            <$8000>            |
+					+-------------------------------+
+		PRG Mode 1: |     $8000     |     $8000     |
+					+---------------+---------------+
+
+
+		CHR Setup:
+		----------------------------
+		'C' and 'c' select an 8k page @ $0000
+		*/
+		bool prg_mode = false;
+		int chr_reg;
+		int prg_reg; 
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "MAPPER062":
+					break;
+				default:
+					return false;
+			}
+			
+			SetMirrorType(EMirrorType.Vertical);
+
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			ser.Sync("prg_reg", ref prg_reg);
+			ser.Sync("chr_reg", ref chr_reg);
+			ser.Sync("prg_mode", ref prg_mode);
+			base.SyncState(ser);
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			prg_mode = addr.Bit(5);
+			if (addr.Bit(7))
+			{
+				SetMirrorType(EMirrorType.Horizontal);
+			}
+			else
+			{
+				SetMirrorType(EMirrorType.Vertical);
+			}
+
+			prg_reg = (addr & 0x40) | ((addr >> 8) & 0x3F);
+			chr_reg = ((addr & 0x1F) << 2) | (value & 0x03); 
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			if (prg_mode == false)
+			{
+				return ROM[((prg_reg >> 1) * 0x8000) + addr];
+			}
+			else
+			{
+				return ROM[(prg_reg * 0x4000) + (addr & 0x3FFF)];
+			}
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			if (addr < 0x2000)
+			{
+				return VROM[(chr_reg * 0x2000) + addr];
+			}
+			return base.ReadPPU(addr);
+		}
+	}
+}