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Fix 01742: punchout, armwrest + many vsnes.c and playch10.c games: Refreshspeed causes fatal exception in punchout.

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This commit is contained in:
Aaron Giles 2008-04-24 05:32:57 +00:00
parent b4fd76f158
commit c205e10516
1 changed files with 6 additions and 4 deletions
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10
src/emu/video.c
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@ -1989,11 +1989,13 @@ static void update_refresh_speed(running_machine *machine)
UINT32 target_speed;
/* find the screen with the shortest frame period (max refresh rate) */
/* note that we first check the token since this can get called before all screens are created */
for (screen = video_screen_first(machine->config); screen != NULL; screen = video_screen_next(screen))
{
screen_state *state = get_safe_token(screen);
min_frame_period = MIN(min_frame_period, state->frame_period);
}
if (screen->token != NULL)
{
screen_state *state = get_safe_token(screen);
min_frame_period = MIN(min_frame_period, state->frame_period);
}
/* compute a target speed as an integral percentage */
target_speed = floor(minrefresh * 100.0 / ATTOSECONDS_TO_HZ(min_frame_period));