Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06646 Speed Major Always 13 days ago 9 days ago
Tester GIGI88200 View Status Public Platform MAME (Official Binary)
Assigned To Resolution Bugs That Aren't Bugs OS Windows Vista/7/8 (64-bit)
Status [?] Resolved Driver segac2.cpp
Version 0.185 Fixed in Version Build 64-bit
Summary 06646: sonicfgt: Game with speed to 100% in mame is 5x too slow
Description The game is 5 times too slow (with turbo 500% it's a coherent speed)
The sound is at the right speed but is therefore desynchronized
Steps To Reproduce just start a game
Additional Information
Regression Version
Affected Sets / Systems sonicfgt
Attached Files

-  Notes
User avatar
13 days ago
I don't see any oddness in how it plays for 0.185, 0.188, or latest GIT. All the sounds sync to the images on screen and the gameplay elements seem consistent and logical. Plays just like the youtube video.

User avatar
13 days ago
It's not like the video in my home, the ship and the sprites are slowed down, while mame does not saturate

I would try in 0.188 tonight
User avatar
12 days ago
This is a weird issue. I can confirm what GIGI88200 is reporting.

I'm getting different results launching the game about 20 times. Sometimes the speed is correct and other times I get the behavior that's being reported here. In either instance MAME reports the game running at 100.00%

It looks like you can trigger it if you press P1 Start when Sonic is talking and waving his finger. You get immediate slowdown and it never recovers.
User avatar
12 days ago
not a bug, but the way this game is designed, likely debug leftovers.
pressing P1 Start makes it work like slowmo, P2 Start return speed to normal.
User avatar
12 days ago
Yup. The start buttons do indeed control speed. Not sure if it is a special feature of the cabinet to slow the game down for the youngest players or not, but it does indeed seem to be something designed/programmed into the game.
BTANB, I think.
User avatar
(Senior Tester)
9 days ago
edited on: 9 days ago
start buttons should probably be unmapped by default in this case as I doubt they were on the cabinet.. should be IPT_OTHER maybe ?