ADD irem_tam-s1.CS

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/IREM_TAM_S1.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	//iNES Mapper 97
+	//Kaiketsu Yanchamaru (Kid Niki 1)
+
+	class IREM_TAM_S1 : NES.NESBoardBase
+	{
+		int prg_bank_mask_16k;
+		byte prg_bank_16k;
+		ByteBuffer prg_banks_16k = new ByteBuffer(2);
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "IREM-TAM-S1":
+					break;
+				default:
+					return false;
+			}
+			SetMirrorType(Cart.pad_h, Cart.pad_v);
+			prg_bank_mask_16k = (Cart.prg_size / 16) - 1;
+			prg_banks_16k[1] = 0xFF;
+			return true;
+		}
+
+		public override void Dispose()
+		{
+			prg_banks_16k.Dispose();
+			base.Dispose();
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("prg_bank_mask_16k", ref prg_bank_mask_16k);
+			ser.Sync("prg_bank_16k", ref prg_bank_16k);
+			ser.Sync("prg_banks_16k", ref prg_banks_16k);
+		}
+
+		void SyncPRG()
+		{
+			prg_banks_16k[0] = prg_bank_16k;
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			prg_bank_16k = (byte)(value & 15);
+			SyncPRG();
+
+			int m = value >> 6;
+			switch (m)
+			{
+				case 0:
+					SetMirrorType(EMirrorType.OneScreenA);
+					break;
+				case 1:
+					SetMirrorType(EMirrorType.Horizontal);
+					break;
+				case 2:
+					SetMirrorType(EMirrorType.Vertical);
+					break;
+				case 3:
+					SetMirrorType(EMirrorType.OneScreenB);
+					break;
+			}
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			int bank_16k = addr >> 14;
+			int ofs = addr & ((1 << 14) - 1);
+			bank_16k = prg_banks_16k[bank_16k];
+			bank_16k &= prg_bank_mask_16k;
+			addr = (bank_16k << 14) | ofs;
+			return ROM[addr];
+		}
+	}
+}