public void ExecuteCommand(Word word)
{
string command = word.Value.Substring(0, 2);
string operand = "";
if (word.Value.Length != 3)
{
operand = word.Value.Substring(2, word.Value.Length - 2);
}
switch (command)
{
case "AD":
{
this.AX = this.AX + this.CX;
break;
}
case "SU":
{
this.AX = this.AX - this.CX;
break;
}
case "CM":
{
if (this.AX > this.CX)
this.SF = 0;
if (this.AX < this.CX)
this.SF = 2;
if (Word.HexToInt(this.AX.Value) == Word.HexToInt(this.CX.Value))
this.SF = 1;
break;
}
case "SA":
{
this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value = this.AX.Value;
break;
}
case "LA":
{
this.AX.Value = this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value;
break;
}
case "SC":
{
this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value = this.CX.Value;
break;
}
case "LC":
{
this.CX.Value = this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value;
break;
}
case "JM":
{
this.PC = Convert.ToInt16(operand, 16);
break;
}
case "JE":
{
if (this.SF == 1)
this.PC = Convert.ToInt16(operand, 16);
else this.PC++;
break;
}
case "JN":
{
if (this.SF != 1)
this.PC = Convert.ToInt16(operand, 16);
else this.PC++;
break;
}
case "JA":
{
if (this.SF == 0)
this.PC = Convert.ToInt16(operand, 16);
else this.PC++;
break;
}
case "JB":
{
if (this.SF == 2)
this.PC = Convert.ToInt16(operand, 16);
else this.PC++;
break;
}
case "JG":
{
if (this.SF == 0 || this.SF == 1)
this.PC = Convert.ToInt16(operand, 16);
else this.PC++;
break;
}
case "JL":
{
if (this.SF == 1 || this.SF == 2)
this.PC = Convert.ToInt16(operand, 16);
else this.PC++;
break;
}
case "GD": //TO DO: everything
{
//memory.Write(operand);
memory.Write(operand, vm.Io.Buffer);
vm.Io.Flush();
break;
}
case "PD":
{
string buf = string.Empty;
int block = Word.HexToInt(operand[0].ToString());
for (int i = 0; i < memory.WordCount; i++)
{
if (memory[block, i].Value != "----")
buf += memory[block, i].Value;
}
vm.Io.Buffer = buf;
vm.Io.WriteBuffer();
vm.Io.Flush();
break;
}
case "--":
{
break;
}
case "$E":
{
break;
}
default:
{
throw new ArgumentException("Unknown command: " + word.Value);
}
}
}