/// <summary>
/// Loads the instruction from Data object and by setting Instruction,
/// FirstWord and SecondWord properties.
/// </summary>
protected void LoadInstruction()
{
FirstWord = Data.DirectMemoryRead(Data.DirectPC);
SecondWord = Data.DirectMemoryRead((ushort)(Data.DirectPC + 1));
byte[] ins = new byte[4];
ins[0] = (byte)(FirstWord >> 12);
ins[1] = (byte)((FirstWord >> 8) & 0xF);
ins[2] = (byte)((FirstWord >> 4) & 0xF);
ins[3] = (byte)(FirstWord & 0xF);
Instruction = ins;
}
