private static void InstructionDecodeAndRegisterFetch(int pc, out string instruction, out string control, out string selected) { InstructionMem.Fill(new string[] { "00111101000010011111111111111111" }); instruction = InstructionMem.GetInstruction(pc); control = ControlUnit.SetInput(instruction.Substring(0, 6), instruction.Substring(26, 6)); Register.SetData(instruction.Substring(6, 5), instruction.Substring(11, 5)); a4to1 = new Mux(new string[] { instruction.Substring(11, 5), instruction.Substring(16, 5), Convert.ToString(31, 2), "" }) { select = control.Substring(0, 2) }; selected = a4to1.Selected(); }
private static string MemoryAccess(string control, string result) //add pc so i can jump and link { Datamem.writeEHB = control.Substring(14, 5).Replace("_", ""); //Write enable, half and byte Datamem.DataIn(result, Register.data2); //perform operation string data = Extender.Extend(Datamem.DataOut(result).Substring(16, 16), control.Substring(20, 3)); m4to1 = new Mux(new String[] { Datamem.DataOut(result), data, result }) { select = control.Substring(26, 2) }; return(m4to1.Selected()); }
private static string AddressCalc(string instruction, string control) { c2to1 = new Mux(new String[] { Register.data1, instruction.Substring(6, 5) }); d2to1 = new Mux(new String[] { Register.data2, Extender.Extend(instruction.Substring(16, 16), control.Substring(20, 1) + "0") }); string selection = control.Substring(4, 4).Replace("_", ""); c2to1.select = selection[0].ToString(); d2to1.select = selection[1].ToString(); string result = ALU.Result(c2to1.Selected(), d2to1.Selected(), control.Substring(9, 4)); return(result); }