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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
05093 Timing Minor Always Dec 25, 2012, 05:22 Dec 25, 2012, 16:03
Tester shmup999 View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows Vista/7 (64-bit)
Status [?] Acknowledged Driver
Version 0.145 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 05093: dfeveron: [possible] Countdown in Time Attack mode runs a little too slow
Description The countdown in Time Attack mode is displayed in minutes, seconds, and decimal fractions of a second. It counts from 3 minutes (maybe 2 minutes 59.99 seconds, really) down to zero. It takes slightly too long to do this: by my reckoning, its "3 minutes" are 3 min 07 sec or 3 min 08 sec real time. I have turned frameskip on and it does not change this. I have set MAME running at "above normal" and even "high" priority and it does not change this.
Steps To Reproduce To access Time Attack mode: insert coin, then hold player 1's first and second buttons while pressing player 1's Start.

To see the bug for yourself: have an old mechanical stopwatch ready, and start it exactly when the game starts (after you select your ship, I mean). Occasionally look over at it, and you will see that the game "minutes" are a bit longer than your stopwatch minutes.
Additional Information MAME reports that the screen refresh rate for this game is around 57.55 hertz. I wonder if the difference between this and 60 Hz has to do with the problem.
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Flags Possible
Regression Version
Affected Sets / Systems dfeveron
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2
User avatar
No.09153
Haze
Senior Tester
Dec 25, 2012, 14:35
quite likely the game timer is based on a 60hz refresh and the actual refresh is 57, such things are very common, but mean it's more likely an original game issue than an emulation one.
User avatar
No.09154
NekoEd
Senior Tester
Dec 25, 2012, 16:02
Yeah, this will require verification against real hardware; I'll acknowledge it until we can get some comparisons.