Start mapper 88

BizHawk.Emulation/BizHawk.Emulation.csproj

@@ -182,6 +182,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\Mapper095.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\Mapper206.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\Namcot1xx.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\Namcot1xx\Namcot3443.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\NAMCOT_m19_m210.cs">
       <SubType>Code</SubType>
     </Compile>

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Namcot1xx/Namcot3443.cs

@@ -0,0 +1,117 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	/*
+	Here are Disch's original notes:  
+	========================
+	=  Mapper 088          =
+	========================
+
+
+	Example Games:
+	--------------------------
+	Quinty (J)
+	Namcot Mahjong 3
+	Dragon Spirit - Aratanaru Densetsu
+
+
+	Registers:
+	---------------------------
+
+	Range,Mask:   $8000-FFFF, $8001
+
+	$8000:  [.... .AAA]  Address for use with $8001
+
+
+	$8001:  [DDDD DDDD]
+	Data port:
+	R:0 ->  CHR reg 0
+	R:1 ->  CHR reg 1
+	R:2 ->  CHR reg 2
+	R:3 ->  CHR reg 3
+	R:4 ->  CHR reg 4
+	R:5 ->  CHR reg 5
+	R:6 ->  PRG reg 0
+	R:7 ->  PRG reg 1
+
+	CHR Setup:
+	---------------------------
+ 
+	CHR is split into two halves.  $0xxx can only have CHR from the first 64k, $1xxx can only have CHR from the
+	second 64k.
+
+		* 
+	$0000   $0400   $0800   $0C00   $1000   $1400   $1800   $1C00 
+	+---------------+---------------+-------+-------+-------+-------+
+	|     <R:0>     |     <R:1>     |  R:2  |  R:3  |  R:4  |  R:5  |
+	+---------------+---------------+-------+-------+-------+-------+
+	|                               |                               |
+	|  AND written values with $3F  |  OR written values with $40   |
+
+
+	PRG Setup:
+	---------------------------
+
+	$8000   $A000   $C000   $E000  
+	+-------+-------+-------+-------+
+	|  R:6  |  R:7  | { -2} | { -1} |
+	+-------+-------+-------+-------+
+	*/
+	class Namcot3443 : Namcot108Board_Base
+	{
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			//analyze board type
+			switch (Cart.board_type)
+			{
+				case "NAMCOT-3443":
+				case "NAMCOT-3433": //TODO: just a guess, find a ROM with this
+				case "MAPPER088":	//TODO: just a guess, find a ROM with this
+					break;
+				default:
+					return false;
+			}
+
+			BaseSetup();
+			SetMirrorType(EMirrorType.Vertical);
+
+			return true;
+		}
+
+		int RewireCHR(int addr)
+		{
+			//int mapper_addr = addr >> 1;
+			//int bank_1k = mapper.Get_CHRBank_1K(mapper_addr + 0x1000);
+			//int ofs = addr & ((1 << 11) - 1);
+			//return (bank_1k << 11) + ofs;
+			if (addr < 0x1000)
+			{
+				int mapper_addr = addr >> 1;
+				int bank_1k = mapper.Get_CHRBank_1K(mapper_addr);
+				int ofs = addr & ((1 << 10) - 1);
+				int bob = (bank_1k << 11) + ofs;
+				return bob & 0x0F;
+			}
+			else
+			{
+				return addr ; //TODO
+			}
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			//if (addr < 0x2000) return VROM[Get_CHRBank_1K(addr)];
+			if (addr < 0x2000) return VROM[RewireCHR(addr)];
+			else return base.ReadPPU(addr);
+		}
+		public override void WritePPU(int addr, byte value)
+		{
+			if (addr < 0x2000) { }
+			else base.WritePPU(addr, value);
+		}
+	}
+}