static void cpu_pre_run(void)
{
int cpunum;
logerror("Machine reset\n");
begin_resource_tracking();
/* read hi scores information from hiscore.dat */
hs_open(Machine->gamedrv->name);
hs_init();
/* initialize the various timers (suspends all CPUs at startup) */
cpu_inittimers();
watchdog_counter = -1;
/* reset sound chips */
sound_reset();
/* first pass over CPUs */
for (cpunum = 0; cpunum < cpu_gettotalcpu(); cpunum++)
{
/* enable all CPUs (except for audio CPUs if the sound is off) */
if (!(Machine->drv->cpu[cpunum].cpu_flags & CPU_AUDIO_CPU) || Machine->sample_rate != 0)
cpunum_resume(cpunum, SUSPEND_ANY_REASON);
else
cpunum_suspend(cpunum, SUSPEND_REASON_DISABLE, 1);
/* reset the interrupt state */
cpuint_reset_cpu(cpunum);
/* reset the total number of cycles */
cpu[cpunum].totalcycles = 0;
cpu[cpunum].localtime = 0;
}
vblank = 0;
/* do this AFTER the above so machine_init() can use cpu_halt() to hold the */
/* execution of some CPUs, or disable interrupts */
if (Machine->drv->machine_init)
(*Machine->drv->machine_init)();
/* now reset each CPU */
for (cpunum = 0; cpunum < cpu_gettotalcpu(); cpunum++)
cpunum_reset(cpunum, Machine->drv->cpu[cpunum].reset_param, cpu_irq_callbacks[cpunum]);
/* reset the globals */
cpu_vblankreset();
current_frame = 0;
state_save_dump_registry();
}
static void reset_callback(int param)
{
int cpunum = param & 0xff;
int state = param >> 8;
/* if we're asserting the line, just halt the CPU */
if (state == ASSERT_LINE)
{
cpunum_suspend(cpunum, SUSPEND_REASON_RESET, 1);
return;
}
/* if we're clearing the line that was previously asserted, or if we're just */
/* pulsing the line, reset the CPU */
if ((state == CLEAR_LINE && (cpu[cpunum].suspend & SUSPEND_REASON_RESET)) || state == PULSE_LINE)
cpunum_reset(cpunum, Machine->drv->cpu[cpunum].reset_param, cpu_irq_callbacks[cpunum]);
/* if we're clearing the line, make sure the CPU is not halted */
cpunum_resume(cpunum, SUSPEND_REASON_RESET);
}
static TIMER_CALLBACK( cpunum_empty_event_queue )
{
int cpunum = param & 0xff;
int line = param >> 8;
int i;
/* swap to the CPU's context */
cpuintrf_push_context(cpunum);
/* loop over all events */
for (i = 0; i < input_event_index[cpunum][line]; i++)
{
INT32 input_event = input_event_queue[cpunum][line][i];
int state = input_event & 0xff;
int vector = input_event >> 8;
LOG(("cpunum_empty_event_queue %d,%d,%d\n",cpunum,line,state));
/* set the input line state and vector */
input_line_state[cpunum][line] = state;
input_line_vector[cpunum][line] = vector;
/* special case: RESET */
if (line == INPUT_LINE_RESET)
{
/* if we're asserting the line, just halt the CPU */
if (state == ASSERT_LINE)
cpunum_suspend(cpunum, SUSPEND_REASON_RESET, 1);
else
{
/* if we're clearing the line that was previously asserted, or if we're just */
/* pulsing the line, reset the CPU */
if ((state == CLEAR_LINE && cpunum_is_suspended(cpunum, SUSPEND_REASON_RESET)) || state == PULSE_LINE)
cpunum_reset(cpunum);
/* if we're clearing the line, make sure the CPU is not halted */
cpunum_resume(cpunum, SUSPEND_REASON_RESET);
}
}
/* special case: HALT */
else if (line == INPUT_LINE_HALT)
{
/* if asserting, halt the CPU */
if (state == ASSERT_LINE)
cpunum_suspend(cpunum, SUSPEND_REASON_HALT, 1);
/* if clearing, unhalt the CPU */
else if (state == CLEAR_LINE)
cpunum_resume(cpunum, SUSPEND_REASON_HALT);
}
/* all other cases */
else
{
/* switch off the requested state */
switch (state)
{
case PULSE_LINE:
/* temporary: PULSE_LINE only makes sense for NMI lines on Z80 */
assert(machine->drv->cpu[cpunum].type != CPU_Z80 || line == INPUT_LINE_NMI);
activecpu_set_input_line(line, INTERNAL_ASSERT_LINE);
activecpu_set_input_line(line, INTERNAL_CLEAR_LINE);
break;
case HOLD_LINE:
case ASSERT_LINE:
activecpu_set_input_line(line, INTERNAL_ASSERT_LINE);
break;
case CLEAR_LINE:
activecpu_set_input_line(line, INTERNAL_CLEAR_LINE);
break;
default:
logerror("cpunum_empty_event_queue cpu #%d, line %d, unknown state %d\n", cpunum, line, state);
}
/* generate a trigger to unsuspend any CPUs waiting on the interrupt */
if (state != CLEAR_LINE)
cpu_triggerint(cpunum);
}
}
/* swap back */
cpuintrf_pop_context();
/* reset counter */
input_event_index[cpunum][line] = 0;
}