UINT16 via6522_device::get_counter1_value()
{
UINT16 val;
if(m_t1_active)
{
val = time_to_cycles(timer_timeleft(m_t1)) - IFR_DELAY;
}
else
{
val = 0xffff - time_to_cycles(attotime_sub(timer_get_time(&m_machine), m_time1));
}
return val;
}
void running_machine::handle_saveload()
{
UINT32 openflags = (m_saveload_schedule == SLS_LOAD) ? OPEN_FLAG_READ : (OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
const char *opnamed = (m_saveload_schedule == SLS_LOAD) ? "loaded" : "saved";
const char *opname = (m_saveload_schedule == SLS_LOAD) ? "load" : "save";
file_error filerr = FILERR_NONE;
/* if no name, bail */
if (m_saveload_pending_file.len() == 0)
goto cancel;
/* if there are anonymous timers, we can't save just yet, and we can't load yet either
because the timers might overwrite data we have loaded */
if (timer_count_anonymous(this) > 0)
{
/* if more than a second has passed, we're probably screwed */
if (attotime_sub(timer_get_time(this), m_saveload_schedule_time).seconds > 0)
{
popmessage("Unable to %s due to pending anonymous timers. See error.log for details.", opname);
goto cancel;
}
return;
}
/* open the file */
mame_file *file;
filerr = mame_fopen(m_saveload_searchpath, m_saveload_pending_file, openflags, &file);
if (filerr == FILERR_NONE)
{
astring fullname(mame_file_full_name(file));
/* read/write the save state */
state_save_error staterr = (m_saveload_schedule == SLS_LOAD) ? state_save_read_file(this, file) : state_save_write_file(this, file);
/* handle the result */
switch (staterr)
{
case STATERR_ILLEGAL_REGISTRATIONS:
popmessage("Error: Unable to %s state due to illegal registrations. See error.log for details.", opname);
break;
case STATERR_INVALID_HEADER:
popmessage("Error: Unable to %s state due to an invalid header. Make sure the save state is correct for this game.", opname);
break;
case STATERR_READ_ERROR:
popmessage("Error: Unable to %s state due to a read error (file is likely corrupt).", opname);
break;
case STATERR_WRITE_ERROR:
popmessage("Error: Unable to %s state due to a write error. Verify there is enough disk space.", opname);
break;
case STATERR_NONE:
if (!(m_game.flags & GAME_SUPPORTS_SAVE))
popmessage("State successfully %s.\nWarning: Save states are not officially supported for this game.", opnamed);
else
popmessage("State successfully %s.", opnamed);
break;
default:
popmessage("Error: Unknown error during state %s.", opnamed);
break;
}
/* close and perhaps delete the file */
mame_fclose(file);
if (staterr != STATERR_NONE && m_saveload_schedule == SLS_SAVE)
osd_rmfile(fullname);
}
else
popmessage("Error: Failed to open file for %s operation.", opname);
/* unschedule the operation */
cancel:
m_saveload_pending_file.reset();
m_saveload_searchpath = NULL;
m_saveload_schedule = SLS_NONE;
}
attotime timer_timeleft(emu_timer *which)
{
return attotime_sub(which->expire, get_current_time());
}
attotime timer_timeelapsed(emu_timer *which)
{
return attotime_sub(get_current_time(), which->start);
}
static double make_fraction(attotime a, attotime b, double timediv)
{
/* fraction = (a - b) / timediv */
return attotime_to_double(attotime_sub(a, b)) / timediv;
}
