BizHawk/BizHawk.Emulation.Cores/Computers/Commodore64/Experimental/C64.Glue.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace BizHawk.Emulation.Cores.Computers.Commodore64.Experimental
{
	public sealed partial class C64
	{
		public void InitializeConnections()
		{
			cia1.InputCNT = user.OutputCNT1;
			cia1.InputFlag = ReadCia1Flag;
			cia1.InputPortA = ReadCia1PortA;
			cia1.InputPortB = ReadCia1PortB;
			cia1.InputSP = user.OutputSP1;

			cia2.InputCNT = user.OutputCNT2;
			cia2.InputFlag = user.OutputFLAG2;
			cia2.InputPortA = ReadCia2PortA;
			cia2.InputPortB = user.OutputData;
			cia2.InputSP = user.OutputSP2;

			cpu.InputAEC = vic.OutputAEC;
			cpu.InputIRQ = ReadIRQ;
			cpu.InputNMI = ReadNMI;
			cpu.InputPort = ReadCPUPort;
			cpu.InputRDY = vic.OutputBA;
			cpu.ReadMemory = pla.ReadMemory;
			cpu.WriteMemory = pla.WriteMemory;

			//expansion.InputBA = vic.OutputBA;
			//expansion.InputData = ReadData;
			//expansion.InputHiExpansion = ReadHiExpansion;
			//expansion.InputHiRom = pla.OutputRomHi;
			//expansion.InputIRQ = ReadIRQ;
			//expansion.InputLoExpansion = ReadLoExpansion;
			//expansion.InputLoRom = pla.OutputRomLo;
			//expansion.InputNMI = ReadNMI;

			//pla.InputAEC = vic.OutputAEC;
			//pla.InputBA = vic.OutputBA;
			//pla.InputCharen = ReadCharen;
			//pla.InputExRom = expansion.OutputExRom;
			//pla.InputGame = expansion.OutputGame;
			//pla.InputHiRam = ReadHiRam;
			//pla.InputLoRam = ReadLoRam;
			//pla.InputVA = ReadVicAddress;

			//serial.InputATN = ReadSerialATN;
			//serial.InputClock = ReadSerialCLK;
			//serial.InputData = ReadSerialDTA;

			//user.InputCNT1 = cia1.OutputCNT;
			//user.InputCNT2 = cia2.OutputCNT;
			//user.InputData = cia2.OutputPortB;
			//user.InputPA2 = ReadUserPA2;
			//user.InputPC2 = cia2.OutputPC;
			//user.InputSP1 = cia1.OutputSP;
			//user.InputSP2 = cia2.OutputSP;
		}

		bool ReadCia1Cnt()
		{
			// this pin is not connected
			return true;
		}

		bool ReadCia1Flag()
		{
			return serial.SRQ && cassette.Data;
		}

		int ReadCia1PortA()
		{
			return joystickB.Data & keyboard.Column;
		}

		int ReadCia1PortB()
		{
			return joystickA.Data & keyboard.Row;
		}

		int ReadCia2PortA()
		{
			int result = 0xFF;
			if (!user.PA2)
				result &= 0xFB;
			if (!serial.Clock)
				result &= 0xBF;
			if (!serial.Data)
				result &= 0x7F;
			return result;
		}

		int ReadCPUPort()
		{
			return 0xFF;
		}

		bool ReadHiExpansion()
		{
			int addr = 0xFFFF;
			return (addr >= 0xDF00 && addr < 0xE000);
		}

		bool ReadIRQ()
		{
			return (
				cia1.IRQ &&
				vic.IRQ &&
				expansion.IRQ
				);
		}

		bool ReadLoExpansion()
		{
			int addr = 0xFFFF;
			return (addr >= 0xDE00 && addr < 0xDF00);
		}

		bool ReadLoRam()
		{
			return (cpu.Port & 0x1) != 0;
		}

		bool ReadNMI()
		{
			return (
				cia2.IRQ &&
				expansion.NMI
				);
		}

		bool ReadSerialATN()
		{
			return (cia2.PortA & 0x08) != 0;
		}

		bool ReadSerialCLK()
		{
			return (cia2.PortA & 0x10) != 0;
		}

		bool ReadSerialDTA()
		{
			return (cia2.PortA & 0x20) != 0;
		}

		bool ReadUserPA2()
		{
			return (cia2.PortA & 0x04) != 0;
		}

		int ReadVicAddress()
		{
			//return (vic.Address | ((cia2.PortA & 0x3) << 14));
			return 0xFFFF;
		}
	}
}