public void tick(object sender, EventArgs e)
{
if (System.Threading.Interlocked.Read(ref cpuBusy) == 0) //Sync timer and CPU
{
System.Threading.Interlocked.Increment(ref cpuBusy);
if (breakpoints.Contains(registers.select[REG.PC].value))
{
Console.WriteLine("[*] Breakpoint at 0x{0:X} reached.\nGoing to Step-by-step mode\n", registers.select[REG.PC].value);
debugMode = CPUDebugMode.Verbose;
mainTimer.Stop();
}
if (debugMode == CPUDebugMode.Verbose)
{
registers.printState();
}
var instruction = new Instruction(memory.readWord(registers.select[REG.PC].value));
executeInstruction(instruction);
foreach (Action <CPU> action in actions)
{
action(this);
}
System.Threading.Interlocked.Decrement(ref cpuBusy);
}
}
System.Collections.Generic.List <Action <CPU> > actions; //debug - actions to perform at the end of every tick
public CPU()
{
memory = new Memory();
registers = new CPURegisters();
breakpoints = new System.Collections.Generic.List <ushort>();
actions = new System.Collections.Generic.List <Action <CPU> >();
debugMode = CPUDebugMode.None;
mainTimer = new System.Timers.Timer();
mainTimer.Elapsed += tick;
cpuBusy = 0;
}
