Add files via upload

BizHawk.Emulation.Cores/Computers/Commodore64/Cartridge/Mapper0007.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using BizHawk.Common;
+
+namespace BizHawk.Emulation.Cores.Computers.Commodore64.Cartridge
+{
+	internal sealed class Mapper0007 : CartridgeDevice
+	{
+		private int[,] _banks = new int[16,0x2000]; 
+
+		private int _bankNumber;
+		private bool _disabled;
+		private int _latchedval;
+
+		// Fun Play mapper
+		// bank switching is done from DE00
+
+		public Mapper0007(IList<int[]> newData, bool game, bool exrom)
+		{
+			pinGame = game;
+			pinExRom = exrom;
+
+			_disabled = false;
+			_latchedval = 0;
+
+			// load data into the banks from the list
+			for (var j = 0; j < 16; j++)
+			{
+				for (var i = 0; i < 0x2000; i++)
+				{
+					_banks[j,i] = newData[j][i];
+				}
+			}
+			_bankNumber = 0;
+		}
+
+		protected override void SyncStateInternal(Serializer ser)
+		{
+			ser.Sync("BankNumber", ref _bankNumber);
+			ser.Sync("Disabled", ref _disabled);
+		}
+
+		public override int Peek8000(int addr)
+		{
+			if (!_disabled)
+				return _banks[_bankNumber, addr];
+			else
+				return base.Read8000(addr);
+		}
+
+		public override void PokeDE00(int addr, int val)
+		{
+			if (addr == 0)
+			{
+				byte temp_bank = (byte)((val & 0x1) << 3);
+				temp_bank |= (byte)((val & 0x38) >> 3);
+				_bankNumber = temp_bank;
+				if (val == 0x86)
+				{
+					_disabled = true;
+				}
+			}
+		}
+
+		public override int Read8000(int addr)
+		{
+			if (!_disabled)
+				return _banks[_bankNumber, addr];
+			else
+				return base.Read8000(addr);
+		}
+
+		public override void WriteDE00(int addr, int val)
+		{
+			if (addr == 0)
+			{
+				byte temp_bank = (byte)((val & 0x1) << 3);
+				temp_bank |= (byte)((val & 0x38) >> 3);
+				_bankNumber = temp_bank;
+				if (val==0x86)
+				{
+					_disabled = true;
+				}
+			}
+		}
+
+		public override int ReadDF00(int addr)
+		{
+			return _latchedval;
+		}
+	}
+}
+