static Cpu()
{
TIME = PC = SF = 0;
AX = new Word(0);
CX = new Word(0);
MODE = WorkMode.SUPERVISOR;
}
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":
{
Cpu.TIME--;
Cpu.AX = Cpu.AX + Cpu.CX;
break;
}
case "SU":
{
Cpu.TIME--;
Cpu.AX = Cpu.AX - Cpu.CX;
break;
}
case "CM":
{
Cpu.TIME--;
if (Cpu.AX > Cpu.CX)
Cpu.SF = 0;
if (Cpu.AX < Cpu.CX)
Cpu.SF = 2;
if (Word.HexToInt(Cpu.AX.Value) == Word.HexToInt(Cpu.CX.Value))
Cpu.SF = 1;
break;
}
case "SA":
{
Cpu.TIME--;
this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value = Cpu.AX.Value;
break;
}
case "LA":
{
Cpu.TIME--;
Cpu.AX.Value = this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value;
break;
}
case "SC":
{
Cpu.TIME--;
this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value = Cpu.CX.Value;
break;
}
case "LC":
{
Cpu.TIME--;
Cpu.CX.Value = this.memory[Convert.ToInt32(operand[0].ToString(), 16), Convert.ToInt32(operand[1].ToString(), 16)].Value;
break;
}
case "JM":
{
Cpu.TIME--;
Cpu.PC = Convert.ToInt16(operand, 16);
break;
}
case "JE":
{
Cpu.TIME--;
if (Cpu.SF == 1)
Cpu.PC = Convert.ToInt16(operand, 16);
else Cpu.PC++;
break;
}
case "JN":
{
Cpu.TIME--;
if (Cpu.SF != 1)
Cpu.PC = Convert.ToInt16(operand, 16);
else Cpu.PC++;
break;
}
case "JA":
{
Cpu.TIME--;
if (Cpu.SF == 0)
Cpu.PC = Convert.ToInt16(operand, 16);
else Cpu.PC++;
break;
}
case "JB":
{
Cpu.TIME--;
if (Cpu.SF == 2)
Cpu.PC = Convert.ToInt16(operand, 16);
else Cpu.PC++;
break;
}
case "JG":
{
Cpu.TIME--;
if (Cpu.SF == 0 || Cpu.SF == 1)
Cpu.PC = Convert.ToInt16(operand, 16);
else Cpu.PC++;
break;
}
case "JL":
{
Cpu.TIME--;
if (Cpu.SF == 1 || Cpu.SF == 2)
Cpu.PC = Convert.ToInt16(operand, 16);
else Cpu.PC++;
break;
}
case "GD": //TO DO: everything
{
Cpu.TIME--;
//memory.Write(operand);
memory.Write(operand, vm.Io.Buffer);
vm.Io.Flush();
break;
}
case "PD":
{
Cpu.TIME--;
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":
{
vm.FinishedWork = true;
break;
}
default:
{
throw new ArgumentException("Unknown command: " + word.Value);
}
}
}
