// -= Addition =-
// ADD DST SRC
// Gets next memory address for DST
// Gets next memory address for SRC
// Adds SRC to DST
public override void Execute(Mainboard mainboard)
{
mainboard.GetCPU().IncrementPC();
mainboard.GetCPU().FetchInstruction(mainboard.GetRAM());
CPURegister dst = mainboard.GetCPU().GetRegister(mainboard.GetCPU().GetInstruction());
mainboard.GetCPU().IncrementPC();
mainboard.GetCPU().FetchInstruction(mainboard.GetRAM());
CPURegister src = mainboard.GetCPU().GetRegister(mainboard.GetCPU().GetInstruction());
byte[] dstValue = dst.GetValue();
Maths.AddArray(ref dstValue, dstValue.Length, src.GetValue()[0]);
mainboard.GetCPU().SetRegister(dst.GetRegisterID(), dstValue);
}
// -= Move =-
// MOV DST VALUE
// Gets next memory address for DST
// Moves value in next memory address to DST
public override void Execute(Mainboard mainboard)
{
mainboard.GetCPU().IncrementPC();
mainboard.GetCPU().FetchInstruction(mainboard.GetRAM());
CPURegister dst = mainboard.GetCPU().GetRegister(mainboard.GetCPU().GetInstruction());
mainboard.GetCPU().IncrementPC();
mainboard.GetCPU().FetchInstruction(mainboard.GetRAM());
byte src = mainboard.GetCPU().GetInstruction();
byte result = (byte)(dst.GetByteValue() + src);
mainboard.GetCPU().SetRegister(dst.GetRegisterID(), result);
}
// -= Interrupt =-
// INT CODE [Register]
// Gets next memory address for CODE
// If interrupt requires, gets memory address for Register
public override void Execute(Mainboard mainboard)
{
mainboard.GetCPU().IncrementPC();
mainboard.GetCPU().FetchInstruction(mainboard.GetRAM());
byte interrupt = mainboard.GetCPU().GetInstruction();
switch (interrupt)
{
case 0xFF: Console.ReadKey(); break; // HALT
case 0x0A:
mainboard.GetCPU().IncrementPC();
mainboard.GetCPU().FetchInstruction(mainboard.GetRAM());
byte register = mainboard.GetCPU().GetInstruction();
Console.WriteLine(mainboard.GetCPU().GetRegister(register).GetIntValue()); break; // Print register value
case 0x80: break;
}
}
