blargg_err_t Sap_Emu::run_clocks( blip_time_t& duration, int )
{
set_time( 0 );
while ( time() < duration )
{
if ( cpu::run( duration ) || r.pc > idle_addr )
return "Emulation error (illegal instruction)";
if ( r.pc == idle_addr )
{
if ( next_play <= duration )
{
set_time( next_play );
next_play += play_period();
call_play();
GME_FRAME_HOOK( this );
}
else
{
set_time( duration );
}
}
}
duration = time();
next_play -= duration;
check( next_play >= 0 );
if ( next_play < 0 )
next_play = 0;
apu.end_frame( duration );
if ( info.stereo )
apu2.end_frame( duration );
return 0;
}
int Hes_Emu::cpu_done()
{
check( time() >= end_time() ||
(!(r.status & i_flag_mask) && time() >= irq_time()) );
if ( !(r.status & i_flag_mask) )
{
hes_time_t present = time();
if ( irq.timer <= present && !(irq.disables & timer_mask) )
{
timer.fired = true;
irq.timer = future_hes_time;
irq_changed(); // overkill, but not worth writing custom code
#if GME_FRAME_HOOK_DEFINED
{
unsigned const threshold = period_60hz / 30;
unsigned long elapsed = present - last_frame_hook;
if ( elapsed - period_60hz + threshold / 2 < threshold )
{
last_frame_hook = present;
GME_FRAME_HOOK( this );
}
}
#endif
return 0x0A;
}
if ( irq.vdp <= present && !(irq.disables & vdp_mask) )
{
// work around for bugs with music not acknowledging VDP
//run_until( present );
//irq.vdp = future_hes_time;
//irq_changed();
#if GME_FRAME_HOOK_DEFINED
last_frame_hook = present;
GME_FRAME_HOOK( this );
#endif
return 0x08;
}
}
return 0;
}
blargg_err_t Nsf_Emu::run_clocks( blip_time_t& duration, int )
{
set_time( 0 );
while ( time() < duration )
{
nes_time_t end = min( next_play, duration );
end = min( end, time() + 32767 ); // allows CPU to use 16-bit time delta
if ( cpu::run( end ) )
{
if ( r.pc != badop_addr )
{
set_warning( "Emulation error (illegal instruction)" );
r.pc++;
}
else
{
play_ready = 1;
if ( saved_state.pc != badop_addr )
{
cpu::r = saved_state;
saved_state.pc = badop_addr;
}
else
{
set_time( end );
}
}
}
if ( time() >= next_play )
{
nes_time_t period = (play_period + play_extra) / clock_divisor;
play_extra = play_period - period * clock_divisor;
next_play += period;
if ( play_ready && !--play_ready )
{
check( saved_state.pc == badop_addr );
if ( r.pc != badop_addr )
saved_state = cpu::r;
r.pc = play_addr;
low_mem [0x100 + r.sp--] = (badop_addr - 1) >> 8;
low_mem [0x100 + r.sp--] = (badop_addr - 1) & 0xFF;
GME_FRAME_HOOK( this );
}
}
