public void frame(int throttle, int frameSkip, int stage)
{
fclock = z80._clock.m + 17556;
//Echo every 100 frames
// if(stage % 100 == 0) Echo("Stepping Gameboy (PC = " + z80.r.pc + ")");
//var brk = document.getElementById('breakpoint').value;
if ((stage % frameSkip) == 0)
{
gPU.drawNow();
}
currentTime = System.DateTime.Now.Ticks;
mMU._timer [0] = (int)((currentTime - startTime) / 610.3515625);
switch (mMU._timer[3] & 0x3)
{
case 0:
mMU._timer [1] += (int)(((currentTime - lastTime) / 610.3515625) / 1024);
break;
case 1:
mMU._timer [1] += (int)(((currentTime - lastTime) / 610.3515625) / 16);
break;
case 2:
mMU._timer [1] += (int)(((currentTime - lastTime) / 610.3515625) / 64);
break;
case 3:
mMU._timer [1] += (int)(((currentTime - lastTime) / 610.3515625) / 256);
break;
}
if (mMU._timer [1] > 255)
{
mMU._if |= 0x04;
lastTime = currentTime;
}
if (currentTime - hblankTime > 283813) //handle hblank
{
mMU._if |= 0x01;
hblankTime = currentTime;
vblanks++;
// Echo("vblank " + vblanks);
}
lastTime = currentTime;
for (; z80._clock.m < fclock && throttle > 0; throttle--)
{
//if(z80._halt!=0) z80.r.m=1;
//else
//{
// z80.r.r = (z80.r.r+1) & 127;
z80._map[mMU.rb(z80.r.pc++)]();
z80.r.pc &= 65535;
//}
if (z80.r.ime != 0 && mMU._ie != 0 && mMU._if != 0)
{
z80._halt = 0; z80.r.ime = 0;
ifired = mMU._ie & mMU._if;
if ((ifired & 1) != 0)
{
mMU._if &= 0xFE; z80.RST40();
}
else if ((ifired & 2) != 0)
{
mMU._if &= 0xFD; z80.RST48();
}
else if ((ifired & 4) != 0)
{
mMU._if &= 0xFB; z80.RST50();
}
else if ((ifired & 8) != 0)
{
mMU._if &= 0xF7; z80.RST58();
}
else if ((ifired & 16) != 0)
{
mMU._if &= 0xEF; z80.RST60();
}
else
{
z80.r.ime = 1;
}
}
z80._clock.m += z80.r.m;
gPU.checkline();
// tIMER.inc();
}
}
