Initial checkin

1 files changed, 140 insertions, 0 deletions

diff --git a/SID.cs b/SID.cs
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index 0000000..f6496ac
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+++ b/SID.cs
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+// SIDFX
+// 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 HardsidInterface;
+
+namespace SIDFX
+{
+	/// <summary>
+	/// Description of SID.	
+	/// </summary>
+	public class SID
+	{
+		[Flags]
+		public enum ControlFlag
+		{
+			NOISE=128,
+			PULSE=64,
+			SAW=32,
+			TRIANGLE=16,
+			TEST=8,
+			RING=4,
+			SYNC=2,
+			GATE=1,
+			NONE=0
+		};
+
+		[Flags]
+		public enum FilterFlag
+		{
+			OFF3=128,
+			HP=64,
+			BP=32,
+			LP=16,
+			EXT=8,
+			V3=4,
+			V2=2,
+			V1=1,
+			NONE=0
+		};
+			
+		public static void Volume(byte volume)
+		{
+			byte v=(byte)(Hardsid.Read(24)&0xf0u);
+			
+			v|=volume;
+			Hardsid.Write(24,v);
+		}
+		
+		public static void Frequency(byte voice, uint val)
+		{
+			byte r=(byte)(voice*7);
+			byte h=(byte)(val>>8);
+			byte l=(byte)(val&0xff);
+			
+			Hardsid.Write(r,l);
+			Hardsid.Write(r+1u,h);
+		}
+		
+		public static void PulseWidth(byte voice, uint val)
+		{
+			byte r=(byte)(voice*7);
+			byte h=(byte)(val>>8);
+			byte l=(byte)(val&0xff);
+			
+			Hardsid.Write(r+2u,l);
+			Hardsid.Write(r+3u,h);
+		}
+		
+		public static void ADSR(byte voice,
+		                        byte attack, byte decay,
+		                        byte sustain, byte release)
+		{
+			byte r=(byte)(voice*7);
+			byte ad=(byte)(((attack&0x0fu)<<4)|(decay&0x0fu));
+			byte sr=(byte)(((sustain&0x0fu)<<4)|(release&0x0fu));
+			
+			Hardsid.Write(r+5u,ad);
+			Hardsid.Write(r+6u,sr);
+		}
+		
+		public static void Control(byte voice, ControlFlag control)
+		{
+			byte r=(byte)(voice*7);
+
+			Hardsid.Write(r+4u,(uint)control);
+		}
+		
+		public static void Cutoff(uint val)
+		{
+			byte h=(byte)(val>>3);
+			byte l=(byte)(val&0x7);
+			
+			Hardsid.Write(21,l);
+			Hardsid.Write(22+1u,h);
+		}
+		
+		public static void Resonance(byte val)
+		{
+			byte v=(byte)(Hardsid.Read(23)&0x0fu);
+			
+			v|=(byte)((val&0x0fu)<<4);
+			Hardsid.Write(23,v);
+		}
+		
+		public static void Filter(FilterFlag flags)
+		{
+			byte h=(byte)((uint)flags&0xf0u);
+			byte l=(byte)((uint)flags&0x0fu);
+
+			byte v=(byte)(Hardsid.Read(23)&0xf0u);
+			
+			v|=l;
+			Hardsid.Write(23,v);
+
+			v=(byte)(Hardsid.Read(24)&0x0fu);
+			
+			v|=h;
+			Hardsid.Write(24,v);
+		}
+		
+		private SID() {}
+	}
+}