110 lines
3.0 KiB
C#
110 lines
3.0 KiB
C#
using BizHawk.Common;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
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{
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/// <summary>
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/// The 48k keyboard device
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/// </summary>
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public class Keyboard48 : IKeyboard
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{
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public SpectrumBase _machine { get; set; }
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private byte[] LineStatus;
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public bool Issue2 { get; set; }
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private string[] _keyboardMatrix;
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public string[] KeyboardMatrix
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{
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get { return _keyboardMatrix; }
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set { _keyboardMatrix = value; }
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}
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public Keyboard48(SpectrumBase machine)
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{
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_machine = machine;
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KeyboardMatrix = new string[]
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{
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// 0xfefe - 0 - 4
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"Key Caps Shift", "Key Z", "Key X", "Key C", "Key V",
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// 0xfdfe - 5 - 9
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"Key A", "Key S", "Key D", "Key F", "Key G",
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// 0xfbfe - 10 - 14
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"Key Q", "Key W", "Key E", "Key R", "Key T",
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// 0xf7fe - 15 - 19
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"Key 1", "Key 2", "Key 3", "Key 4", "Key 5",
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// 0xeffe - 20 - 24
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"Key 0", "Key 9", "Key 8", "Key 7", "Key 6",
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// 0xdffe - 25 - 29
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"Key P", "Key O", "Key I", "Key U", "Key Y",
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// 0xbffe - 30 - 34
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"Key Return", "Key L", "Key K", "Key J", "Key H",
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// 0x7ffe - 35 - 39
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"Key Space", "Key Sym Shift", "Key M", "Key N", "Key B"
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};
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LineStatus = new byte[8];
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}
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public void SetKeyStatus(string key, bool isPressed)
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{
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byte keyByte = GetByteFromKeyMatrix(key);
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var lineIndex = keyByte / 5;
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var lineMask = 1 << keyByte % 5;
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LineStatus[lineIndex] = isPressed ? (byte)(LineStatus[lineIndex] | lineMask)
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: (byte)(LineStatus[lineIndex] & ~lineMask);
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}
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public bool GetKeyStatus(string key)
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{
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byte keyByte = GetByteFromKeyMatrix(key);
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var lineIndex = keyByte / 5;
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var lineMask = 1 << keyByte % 5;
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return (LineStatus[lineIndex] & lineMask) != 0;
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}
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public byte GetLineStatus(byte lines)
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{
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lock(this)
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{
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byte status = 0;
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lines = (byte)~lines;
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var lineIndex = 0;
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while (lines > 0)
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{
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if ((lines & 0x01) != 0)
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status |= LineStatus[lineIndex];
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lineIndex++;
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lines >>= 1;
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}
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var result = (byte)~status;
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return result;
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}
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}
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public byte ReadKeyboardByte(ushort addr)
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{
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return GetLineStatus((byte)(addr >> 8));
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}
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public byte GetByteFromKeyMatrix(string key)
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{
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int index = Array.IndexOf(KeyboardMatrix, key);
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return (byte)index;
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}
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public void SyncState(Serializer ser)
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{
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ser.BeginSection("Keyboard");
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ser.Sync("LineStatus", ref LineStatus, false);
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ser.EndSection();
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}
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}
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}
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