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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() {}
}
}
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