public void Call(Processor processor)
{
var mdr = processor[Register.MemoryData];
var dest = (Register)(mdr >> 9 & 0b111);
var sr1 = (Register)(mdr >> 6 & 0b111);
var leftVal = processor[sr1];
var fromImmediate = mdr >> 5 & 1;
int rightVal;
if (fromImmediate == 1)
{
rightVal = mdr & 0b1_1111;
if (Program.Disassemble)
{
Console.WriteLine($"ADD\t{dest}, {sr1}, #{rightVal:X}");
}
}
else
{
var sr2 = (Register)(mdr & 0b111);
rightVal = processor[sr2];
if (Program.Disassemble)
{
Console.WriteLine($"ADD\t{dest}, {sr1}, {sr2}");
}
}
var result = (short)(leftVal + rightVal);
processor[dest] = result;
processor[Register.Flag] = BR.MapResult(result);
}
public void Call(Processor processor)
{
var mdr = processor[Register.MemoryData];
var register = (Register)(mdr >> 9 & 0b111);
var value = mdr & 0b1_1111_1111;
var result = (short)(processor[Register.PC] + (short)value);
processor[register] = result;
processor[Register.Flag] = BR.MapResult(result);
if (Program.Disassemble)
{
Console.WriteLine($"LEA\t{register}, #{value:X}");
}
}
public void Call(Processor processor)
{
var mdr = processor[Register.MemoryData];
var register = (Register)(mdr >> 9 & 0b111);
var ptr = mdr & 0b1_1111_1111;
var result = (short)processor.Memory[processor.Memory[ptr]];
processor[register] = result;
processor[Register.Flag] = BR.MapResult(result);
if (Program.Disassemble)
{
Console.WriteLine($"LDI\t{register}, #{ptr:X}");
}
}
public void Call(Processor processor)
{
var mdr = processor[Register.MemoryData];
var offset = mdr & 0b11_1111;
var baseRegister = (Register)(mdr >> 6 & 0b111);
var dest = (Register)(mdr >> 9 & 0b111);
var result = (short)processor.Memory[processor[baseRegister] + offset];
processor[dest] = result;
processor[Register.Flag] = BR.MapResult(result);
if (Program.Disassemble)
{
Console.WriteLine($"LDR\t{dest}, {baseRegister}, #{offset:X}");
}
}