public Cpu(Form form1_reference, ref Memory memory, ref Video video, ref Sound sound, ref Input input)
{
_memory = memory;
_video = video;
_sound = sound;
_input = input;
cycles = 0;
extra_cycles = 0;
frame = 0;
byte_temp1 = byte_temp2 = 0;
ushort_temp1 = ushort_temp2 = 0;
shift_register = 0;
shift_register_offset = 0;
regs.A = regs.B = regs.C = regs.D = regs.E = regs.H = regs.L = 0;
regs.F = 6;
pc = 0;
sp = 0;
opcode = 0;
INTE = 0;
try
{
DipSwitch = byte.Parse(((Form1)form1_reference).main_settings.read_config_setting("Game", "Dip_Switch_Total"), System.Globalization.NumberStyles.HexNumber);
}
catch
{
DipSwitch = 0;
}
parity_loopup = new byte[0x100];
cycles_lookup = new byte[] {
4, 10,7, 5, 5, 5, 7, 4, 0, 10,7, 5, 5, 5, 7, 4,
0, 10,7, 5, 5, 5, 7, 4, 0, 10,7, 5, 5, 5, 7, 4,
0, 10,16,5, 5, 5, 7, 4, 0, 10,16,5, 5, 5, 7, 4,
0, 10,13,5, 10,10,10,4, 0, 10,13,5, 5, 5, 7, 4,
5, 5, 5, 5, 5, 5, 7, 5, 5, 5, 5, 5, 5, 5, 7, 5,
5, 5, 5, 5, 5, 5, 7, 5, 5, 5, 5, 5, 5, 5, 7, 5,
5, 5, 5, 5, 5, 5, 7, 5, 5, 5, 5, 5, 5, 5, 7, 5,
7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 7, 5,
4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4,
4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4,
4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4,
4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4,
5, 10,10,10,11,11,7, 11,5, 10,10,0, 11,17,7, 11,
5, 10,10,10,11,11,7, 11,5, 0, 10,10,11,0, 7, 11,
5, 10,10,18,11,11,7, 11,5, 5, 10,4, 11,0, 7, 11,
5, 10,10,4, 11,11,7, 11,5, 5, 10,4, 11,0, 7, 11
};
for (int i = 0; i < parity_loopup.Length; i++)
{
parity_loopup[i] = (byte)(4 & (4 ^ (i << 2) ^ (i << 1) ^ i ^ (i >> 1) ^ (i >> 2) ^ (i >> 3) ^ (i >> 4) ^ (i >> 5)));
}
}
public void subitem_Start_CPU()
{
if (Critical_failure == false)
{
try
{
if (video != null && time != null)
{
if (video.Fatal_error)
{
MessageBox.Show("The Space Invaders encountered an error loading, \nthis option is not available right now.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
if (time.Enabled || Paused_state == true)
{
MessageBox.Show("CPU is either currently running or is currently paused, \nthis operation can not continue.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
}
Window_state = FormWindowState.Minimized;
Taskbar_visibility = false;
Screen_visibility = false;
if (video == null)
{
video = new Video(this);
memory = new Memory(this, video);
input = new Input(this, video.Directx_Window.Handle);
sound = new Sound(this, video);
cpu = new Cpu(this, ref memory, ref video, ref sound, ref input);
}
else
{
video.reinit_directx();
sound.reinit_directsound();
input.Reinitialize_Keyboard(video.Directx_Window.Handle);
if (cpu == null)
{
cpu = new Cpu(this, ref memory, ref video, ref sound, ref input);
}
}
if (time == null)
{
time = new Timer();
time.Interval = 15;
time.Tick += new EventHandler(time_Tick);
}
time.Start();
video.Directx_Window.Activate();
}
catch (Exception e)
{
MessageBox.Show(e.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show("A critical error has been detected in the emulator, This menu has been disabled. Please contact author for assistance.", "Error!", MessageBoxButtons.OK);
}
}