public void Tick()
{
if ((memory & KeypadFlag.Button) == 0)
{
for (int i = 3; i >= 0; i--)
{
byte flag = (byte)(1 << i);
if (buttonKeys [i])
{
// pressed
if ((memory & flag) == flag)
{
mmu.RequestInterrupt(InterruptFlag.Joypad);
Debug.Log("Interrupt for button " + System.Convert.ToString(flag, 2) + " " + System.Convert.ToString(memory, 2));
}
memory &= (byte)~flag;
Debug.Log(System.Convert.ToString(memory, 2).PadLeft(8, '0'));
}
else
{
// released
memory |= flag;
}
}
}
else if ((memory & KeypadFlag.Joypad) == 0)
{
for (int i = 3; i >= 0; i--)
{
byte flag = (byte)(1 << i);
if (joypadKeys [i])
{
// pressed
if ((memory & flag) == flag)
{
mmu.RequestInterrupt(InterruptFlag.Joypad);
Debug.Log("Interrupt for joypad " + System.Convert.ToString(flag, 2) + " " + System.Convert.ToString(memory, 2));
}
memory &= (byte)~flag;
Debug.Log(System.Convert.ToString(memory, 2).PadLeft(8, '0'));
}
else
{
// released
memory |= flag;
}
}
}
}
void TickVram(bool ime)
{
// if (!lineRendered && (cc >= (ly > 0 ? 12L : 40L))) {
// lineRendered = true;
// RenderScanline ();
// }
if (cc >= VramCycles)
{
cc -= VramCycles;
RenderScanline();
SetLcdMode(LcdMode.Hblank);
// DoHdma ();
if (ime && hblankEnabled)
{
mmu.RequestInterrupt(InterruptFlag.LcdStat);
}
}
}
public void Tick(long cc)
{
// m-clock increments at 1/4 the m-clock rate
tc += cc;
// timer ticks occur at 1/16 the CPU cycles
while (tc >= TicksPerSecondsAtBaseSpeed)
{
tc -= TicksPerSecondsAtBaseSpeed;
bc++;
dc++;
// divider clock
if (dc == TicksPerSecondsAtBaseSpeed)
{
divider++;
dc = 0;
}
// check if timer is enabled
if ((controller & TimerControllerEnabledFlag) == TimerControllerEnabledFlag)
{
// get frequency
int threshold = timerFrequencies [controller & 0x03];
while (bc >= threshold)
{
bc -= threshold;
if (counter == 0xFF)
{
// overflow!
counter = modulator;
mmu.RequestInterrupt(InterruptFlag.TimeOverflow);
}
else
{
// increment counter
counter++;
}
}
}
}
}