Atari - Checkin DPC Mapper file

BizHawk.Emulation/Consoles/Atari/2600/Mappers/mDPC.cs

@@ -1,7 +1,8 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
+using System.IO;
-using System.Text;
+using BizHawk.Emulation.CPUs.M6502;
+using BizHawk.Emulation.Consoles.Atari;
 
 namespace BizHawk
 {
@@ -9,10 +10,141 @@ namespace BizHawk
 	{
 		class mDPC : MapperBase
 		{
+			int bank_4k = 0;
+			IntBuffer Counters = new IntBuffer(8);
+			IntBuffer Flags = new IntBuffer(8);
+			IntBuffer Tops = new IntBuffer(8);
+			IntBuffer Bottoms = new IntBuffer(8);
+			ByteBuffer DisplayBank_2k = new ByteBuffer(2048);
+			byte RandomNumber = 0;
+
+			bool[] MusicMode = new bool[3]; //TOOD: savestates
+
 			public override byte ReadMemory(ushort addr)
 			{
-				if (addr < 0x1000) return base.ReadMemory(addr);
+				if (addr < 0x1000)
-				return core.rom[addr & 0x7FF];
+				{
+					if (addr < 0x0040)
+					{
+						byte result = 0;
+						int index = addr & 0x07;
+						int function = (addr >> 3) & 0x07;
+
+						// Update flag register for selected data fetcher
+						if ((Counters[index] & 0x00ff) == Tops[index])
+						{
+							Flags[index] = 0xff;
+						}
+						else if ((Counters[index] & 0x00ff) == Bottoms[index])
+						{
+							Flags[index] = 0x00;
+						}
+
+						switch (function)
+						{
+							default:
+								if (index < 4)
+								{
+									result = RandomNumber;
+								}
+								else
+								{
+									result = 0;//TODO
+								
+
+									//byte[8] musicAmplitudes = {
+									//    0x00, 0x04, 0x05, 0x09, 0x06, 0x0a, 0x0b, 0x0f
+									//};
+
+									//// Update the music data fetchers (counter & flag)
+									//UpdateMusicModeDataFetchers();
+
+									//byte i = 0;
+									//if(MusicMode[0] && Flags[5])
+									//{
+									//    i |= 0x01;
+									//}
+									//if(MusicMode[1] && Flags[6])
+									//{
+									//    i |= 0x02;
+									//}
+									//if(MusicMode[2] && Flags[7])
+									//{
+									//    i |= 0x04;
+									//}
+
+									//result = MusicAmplitudes[i];
+								}
+								break;
+							case 0x00:
+								result = 0; //TODO
+								break;
+							case 0x01:
+								result = DisplayBank_2k[2047 - Counters[index]];
+								break;
+							case 0x02:
+								result = DisplayBank_2k[2047 - (Counters[index] & Flags[index])];
+								break;
+							case 0x07:
+								break;
+						}
+
+						return result;
+					}
+					else
+					{
+						return base.ReadMemory(addr);
+					}
+				}
+				else
+				{
+					Address(addr);
+					return core.rom[(bank_4k << 12)+ (addr & 0xFFF)];
+				}
+			}
+
+			public override void WriteMemory(ushort addr, byte value)
+			{
+				Address(addr);
+				if (addr < 0x1000)
+				{
+					base.WriteMemory(addr, value);
+				}
+			}
+
+			private void Address(ushort addr)
+			{
+				if (addr == 0x1FF8)
+				{
+					bank_4k = 0;
+				}
+				else if (addr == 0x1FF9)
+				{
+					bank_4k = 1;
+				}
+			}
+
+			public override void Dispose()
+			{
+				DisplayBank_2k.Dispose();
+				Counters.Dispose();
+				Flags.Dispose();
+				base.Dispose();
+			}
+
+			public override void SyncState(Serializer ser)
+			{
+				base.SyncState(ser);
+				ser.Sync("bank_4k", ref bank_4k);
+				ser.Sync("DisplayBank_2k", ref DisplayBank_2k);
+				ser.Sync("Flags", ref Flags);
+				ser.Sync("Counters", ref Counters);
+				ser.Sync("RandomNumber", ref RandomNumber);
+			}
+
+			private void UpdateMusicModeDataFetchers()
+			{
+				//TODO
 			}
 		}
 	}

BizHawk.Emulation/Consoles/Atari/2600/Mappers/mF8.cs

@@ -28,6 +28,7 @@ namespace BizHawk
 		class mF8 : MapperBase
 		{
 			int bank_4k = 0;
+			
 
 			public override byte ReadMemory(ushort addr)
 			{
@@ -44,7 +45,8 @@ namespace BizHawk
 			public override void SyncState(Serializer ser)
 			{
 				base.SyncState(ser);
-				ser.Sync("toggle", ref bank_4k);
+				ser.Sync("bank_4k", ref bank_4k);
+				
 			}
 
 			void Address(ushort addr)