NESHawk: Add mapper 114

Aladdin Super Game

BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper114.cs

@@ -0,0 +1,104 @@
+using BizHawk.Common;
+using System;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+	// Mapper for Aladdin Super Game
+	public sealed class Mapper114 : MMC3Board_Base
+	{
+		private ByteBuffer EXPREGS = new ByteBuffer(2);
+
+		private byte[] sec = { 0, 3, 1, 5, 6, 7, 2, 4 };
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "MAPPER114":
+					break;
+				default:
+					return false;
+			}
+
+			BaseSetup();
+			SetMirrorType(EMirrorType.Horizontal);
+			mmc3.MMC3Type = MMC3.EMMC3Type.MMC3A;
+			return true;
+		}
+
+		public override void Dispose()
+		{
+			EXPREGS.Dispose();
+			base.Dispose();
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("expregs", ref EXPREGS);
+		}
+
+		public override void WriteEXP(int addr, byte value)
+		{
+			if ((addr & 0x7) == 0 && addr >= 0x1000)
+			{
+				EXPREGS[0] = value;
+			}
+		}
+
+		public override void WriteWRAM(int addr, byte value)
+		{
+			if ((addr & 0x7) == 0)
+			{
+				EXPREGS[0] = value;
+			}
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			switch (addr & 0x6000)
+			{
+				case 0x0000: //$8000
+					base.SetMirrorType((value & 1) == 1 ? EMirrorType.Horizontal : EMirrorType.Vertical);
+					break;
+				case 0x2000: //$A000
+					value = (byte)((value & 0xC0) | sec[value & 0x07]);
+					EXPREGS[1] = 1;
+					base.WritePRG(0, value);
+					break;
+				case 0x4000: //$C000
+					if(EXPREGS[1] == 1)
+					{
+						EXPREGS[1] = 0;
+						base.WritePRG(1, value);
+					}
+					break;
+				case 0x6000: //$E000 
+					if (value > 0)
+					{
+						base.WritePRG(0x6001, value);
+						base.WritePRG(0x4000, value);
+						base.WritePRG(0x4001, value);
+					}
+					else
+					{
+						base.WritePRG(0x6000, value);
+					}
+					break;
+			}
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			if ((EXPREGS[0] & 0x80) > 0)
+			{
+				var bank = (EXPREGS[0] & 0x1F);
+				return ROM[(bank << 14) + (addr & 0x3FFF)];
+			}
+			else
+			{
+				return base.ReadPRG(addr);
+			}
+		}
+	}
+}