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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08716 Gameplay Minor Always Jul 10, 2023, 22:58 23 days ago
Tester johnmcallister View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10/11 (64-bit)
Status [?] Acknowledged Driver
Version 0.250 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08716: alpine, alpinea: Timer runs faster than arcade hardware.
Description The in game timer runs around 5 seconds faster in 1 downhill run which takes 23.5 in game for arcade and 28.5 in mame.
The actual real time is within 1/2 second though.
You can find the information here, videos and description.

https://www.twingalaxies.com/showthread.php/262022-Arcade-Alpine-Ski-Points-Tournament-Settings-999-999?p=1192607&posted=1#post1192607
Steps To Reproduce Always happens
Additional Information I tried in 106 and 250 and is the same.
Github Commit
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Regression Version
Affected Sets / Systems alpine, alpinea
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No.22444
hap
Developer
23 days ago
Looks like it's a Z80 waitstate issue, schematics show that the WAIT pin is connected to several things.
If you underclock the maincpu in MAME, it affects the game timer rate. Strange that they didn't use a vsync counter for the timer.