commodore64: PRG files now autoload after Kernal is ready- hardcoded to load at 2064 for now

BizHawk.Emulation/BizHawk.Emulation.csproj

@@ -84,6 +84,8 @@
     <Compile Include="Computers\Commodore64\Cartridge.cs" />
     <Compile Include="Computers\Commodore64\Cia.cs" />
     <Compile Include="Computers\Commodore64\DataPort.cs" />
+    <Compile Include="Computers\Commodore64\IMedia.cs" />
+    <Compile Include="Computers\Commodore64\PRGFile.cs" />
     <Compile Include="Computers\Commodore64\MemBus.cs" />
     <Compile Include="Computers\Commodore64\Sid.cs" />
     <Compile Include="Computers\Commodore64\VicII.cs" />

BizHawk.Emulation/Computers/Commodore64/C64.core.cs

@@ -11,9 +11,9 @@ namespace BizHawk.Emulation.Computers.Commodore64
 	{
 		// source
 		public Cartridge cart;
-		public bool cartInserted;
 		public string extension;
 		public byte[] inputFile;
+		public List<IMedia> mediaAttached = new List<IMedia>();
 
 		// chipset
 		public Cia cia0;
@@ -59,18 +59,12 @@ namespace BizHawk.Emulation.Computers.Commodore64
 			{
 				case @".PRG":
 					if (inputFile.Length > 2)
-					{
+						mediaAttached.Add(new PRGFile(inputFile, mem, cpu));
-						mem.ApplyMemory(inputFile);
-						// idle vector
-						cpu.PC = (ushort)2064;
-					}
 					break;
 				case @".CRT":
 					Cartridge cart = new Cartridge(inputFile);
 					if (cart.valid)
-					{
+						mediaAttached.Add(cart);
-						mem.ApplyCartridge(cart);
-					}
 					break;
 			}
 

BizHawk.Emulation/Computers/Commodore64/C64.cs

@@ -89,6 +89,14 @@ namespace BizHawk.Emulation.Computers.Commodore64
 
 			int cyclesPerSecond = (14318181 / 14 / 60);
 
+			foreach (IMedia media in mediaAttached)
+			{
+				if (!media.Loaded() && media.Ready())
+				{
+					media.Apply(mem);
+				}
+			}
+
 			for (int i = 0; i < cyclesPerSecond; i++)
 			{
 				cpu.IRQ = signal.CpuIRQ;

BizHawk.Emulation/Computers/Commodore64/Cartridge.cs

@@ -15,7 +15,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
 		public int type;
 	}
 
-	public class Cartridge
+	public class Cartridge : IMedia
 	{
 		public List<CartridgeChip> chips;
 		public bool exRomPin;
@@ -24,6 +24,8 @@ namespace BizHawk.Emulation.Computers.Commodore64
 		public bool valid;
 		public int version;
 
+		private bool loaded;
+
 		public Cartridge(byte[] rom)
 		{
 			chips = new List<CartridgeChip>();
@@ -135,12 +137,31 @@ namespace BizHawk.Emulation.Computers.Commodore64
 			}
 		}
 
+		public void Apply(Memory mem)
+		{
+			mem.cart = this;
+			mem.exRomPin = exRomPin;
+			mem.gamePin = gamePin;
+			mem.UpdateLayout();
+			loaded = true;
+		}
+
+		public bool Loaded()
+		{
+			return loaded;
+		}
+
 		public byte Read(ushort addr)
 		{
 			CartridgeChip currentChip = chips[0];
 			return currentChip.data[addr & currentChip.romMask];
 		}
 
+		public bool Ready()
+		{
+			return true;
+		}
+
 		public void Write(ushort addr, byte val)
 		{
 			// can't write to rom but we can process DE00/DF00 here

BizHawk.Emulation/Computers/Commodore64/IMedia.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Computers.Commodore64
+{
+	public interface IMedia
+	{
+		void Apply(Memory mem);
+		bool Loaded();
+		bool Ready();
+	}
+}

BizHawk.Emulation/Computers/Commodore64/MemBus.cs

@@ -45,7 +45,6 @@ namespace BizHawk.Emulation.Computers.Commodore64
 
 		// storage
 		public Cartridge cart;
-		public bool cartInserted = false;
 
 		// roms
 		public byte[] basicRom;
@@ -107,27 +106,15 @@ namespace BizHawk.Emulation.Computers.Commodore64
 			HardReset();
 		}
 
-		public void ApplyCartridge(Cartridge newCart)
+		public byte this[ushort index]
 		{
-			cart = newCart;
+			get
-			cartInserted = true;
+			{
-			exRomPin = cart.exRomPin;
+				return ram[index];
-			gamePin = cart.gamePin;
-			UpdateLayout();
 			}
-
+			set
-		public void ApplyMemory(byte[] newMemory)
 			{
-			int address = newMemory[1];
+				ram[index] = value;
-			address <<= 8;
-			address |= newMemory[0];
-
-			int count = newMemory.Length;
-
-			for (int i = 2; i < count; i++)
-			{
-				Write((ushort)(address & 0xFFFF), newMemory[i]);
-				address++;
 			}
 		}
 

BizHawk.Emulation/Computers/Commodore64/PRGFile.cs

@@ -0,0 +1,79 @@
+using BizHawk.Emulation.CPUs.M6502;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Computers.Commodore64
+{
+	public class PRGFile : IMedia
+	{
+		private MOS6502X cpu;
+		private byte[] data;
+		private bool loaded;
+		private Memory mem;
+
+		public PRGFile(byte[] file, Memory checkMem, MOS6502X targetCpu)
+		{
+			cpu = targetCpu;
+			mem = checkMem;
+			data = file;
+		}
+
+		public void Apply(Memory mem)
+		{
+			int address = data[1];
+			address <<= 8;
+			address |= data[0];
+
+			int count = data.Length;
+
+			for (int i = 2; i < count; i++)
+			{
+				mem.Write((ushort)(address & 0xFFFF), data[i]);
+				address++;
+			}
+
+			//// "RUN"
+			//mem[0x04F0] = 0x12;
+			//mem[0x04F1] = 0x15;
+			//mem[0x04F2] = 0x0E;
+			
+			//// set cursor to be right after run (3, 6)
+			//mem[0x00C9] = 0x06;
+			//mem[0x00CA] = 0x03;
+			//mem[0x00D3] = 0x03;
+			//mem[0x00D6] = 0x06;
+
+			//// set keyboard buffer
+			//mem[0x00C5] = 0x0D;
+			//mem[0x00C6] = 0x02;
+			//mem[0x00CB] = 0x0D;
+			//mem[0x0277] = 0x0D;
+			//mem[0x0278] = 0x0D;
+
+			cpu.PC = 2064;
+
+			loaded = true;
+		}
+
+		public bool Loaded()
+		{
+			return loaded;
+		}
+
+		public bool Ready()
+		{
+			// wait for READY. to be on display
+			return (
+				mem[0x04C8] == 0x12 &&
+				mem[0x04C9] == 0x05 &&
+				mem[0x04CA] == 0x01 &&
+				mem[0x04CB] == 0x04 &&
+				mem[0x04CC] == 0x19 &&
+				mem[0x04CD] == 0x2E &&
+				mem[0x04CE] == 0x20
+				);
+		}
+	}
+}