Cruis'n USA runs too fast

[mrchrister]

I'm having issues with Groovymame and Cruis'n USA. It runs at around 150% speed on my Groovymame setup.
The game has a resolution of 512x400 at 57.2hz. It is the only game of the 10 or so games I tested that switchres seems to have trouble with. I'm using GM .261 with default install. CPU is 8700k.

I found a fix by disabling modeline_generation in mame.ini but I wonder if other folks have that same issue.

Here is the info I get at command line:

Code: [Select]

c:\arcade\mame>groovymame.exe crusnusa
Switchres: Calculating best video mode for 512x451@57.349014 orientation: normal
Switchres: Modeline "2560x464_60i 15.684955KHz 57.349014Hz" 54.175835 2560 2777 3021 3454 464 487 493 547 interlace  -hsync -vsync
a-19993.u38 ROM NEEDS REDUMP
a-19670.u43 ROM NEEDS REDUMP
a-19668.u52 ROM NEEDS REDUMP
a-19671.u54 ROM NEEDS REDUMP
a-19673.u111 ROM NEEDS REDUMP
a-19672.u114 NOT FOUND (NO GOOD DUMP KNOWN) (tried in crusnusa)
c31boot.bin ROM NEEDS REDUMP
WARNING: the machine might not run correctly.
Switchres: Calculating best video mode for 512x400@57.349014 orientation: normal
Switchres: Modeline "2560x512_58i 15.857002KHz 57.349014Hz" 54.976227 2560 2780 3027 3467 512 515 521 553 interlace  -hsync -vsync
Average speed: 146.46% (63 seconds)

c:\arcade\mame>


[haynor666]

https://forum.arcadecontrols.com/index.php/topic,143528.msg1489766.html

https://forum.arcadecontrols.com/index.php/topic,161386.msg1700327.html#msg1700327

[mrchrister]

Thanks for your reply, but I'm not sure that's the same problem.
1. Regular mame does not have the problem
2. When disabling modeline_generation it works at the correct speed

It seems to be a bug in switchres picking a wrong mode line for the game

[Rion]

Have you tried forcing 512x400@57.349016 Hz 31kHz I'm a swirchres ini override file?

[Calamity]

This should be fixed on 0.265, please confirm.

[haynor666]

I'll prepare my build and test on next week. I didn't play arcade games for some time :/

[squawkbox]

Hi guys
New French member here

With GM 0.261, on my machine (much less powerful CPU than the OP's), said game runs indeed too fast (Average speed: 120.82%) and fails to pick up the right vertical resolution
Same in GM 0.265, it runs at the wrong speed, aka at the average speed of 78.07%
while in GM 0.228 (the version I use on a regular basis), it runs at the average speed of 99.98%, picks the right vertical resolution and screen refreshes itself at 57.928295Hz
Unlike what happens with 0.261 and 0.265, command line doesn't issue the following line

Switchres: Calculating best video mode for xxxx orientation: normal