// C# Hardsid interface
// Copyright (C) 2004  Ian Cowburn
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
// $Id$
//
using System;
using System.Runtime.InteropServices;

namespace HardsidInterface
{
	/// <summary>
	/// Main Hardsid class
	/// </summary>
	public class Hardsid
	{
		public delegate void DebugEvent(uint device, uint reg, uint val);
		
		public static event DebugEvent	DebugWrite;
		
		public static void Init()
		{
			InitHardSID_Mapper();
		}
		
		public static int Count
		{
			get {return (int)GetHardSIDCount();}
		}
		
		public static void Write(uint reg, uint val)
		{
			//System.Diagnostics.Debugger.Break();
			WriteToHardSID(0,Cast(reg),Cast(val));
			
			if (DebugWrite!=null)
			{
				DebugWrite(0,reg,val);
			}
		}
		
		public static void Write(uint device, uint reg, uint val)
		{
			WriteToHardSID(Cast(device),Cast(reg),Cast(val));
			
			if (DebugWrite!=null)
			{
				DebugWrite(device,reg,val);
			}
		}
		
		public static uint Read(uint device, uint reg)
		{
			return ReadFromHardSID(Cast(device),Cast(reg));
		}
		
		public static byte Read(uint reg)
		{
			return ReadFromHardSID(0,Cast(reg));
		}
		
		public static void DLLDebug(int i)
		{
			SetDebug(i);
		}
		
		private static byte Cast(uint v)
		{
			return (byte)(v&0xffu);
		}
		
		[DllImport ("HARDSID.DLL")]
		private static extern byte GetHardSIDCount();

		[DllImport ("HARDSID.DLL")]
		private static extern void WriteToHardSID(byte id, byte reg, byte data); 

		[DllImport ("HARDSID.DLL")]
		private static extern byte ReadFromHardSID(byte id, byte reg); 

		[DllImport ("HARDSID.DLL")]
		private static extern byte InitHardSID_Mapper(); 

		[DllImport ("HARDSID.DLL")]
		private static extern void SetDebug(int i); 
	}
}