Groovymame MK2 split display

[webster007]

I had some time to setup my golden tee machine for groovymame.

I got all the roms to work and switchres works.

The only thing is, on Mortal Kombat 2 it splits the display?

Does anyone know what setting to change?

 

[Retroman839]

does switch res give you a resolution screen before loading

like is it 640 480?

what is the resolution switch res is using?

 

[Retroman839]

is your golden tee resolution 25khz? on chasis?

 

[Retroman839]

correct res for mk 1 2 3 is 400x254 at 15khz.

groovy only runs 15khz outputs

SAFTY FIRST DONT GO ANYWHERE NEAR YOUR MONTOR IF YOU ARE NOT AWARE OF ALL THE DANGERS AS HIGH VOLTAGE VERY DANGER!!!

IF YOU CAN SEE MAKE AND MODEL NUMBER OF THE MONITOR AND CHASSIS

POST A PIC HERE OF YOU MONITOR AND CHASSSIS

check your chassis is not 25khz only or better still has 25khz & 15khz socket next to the 25khz socket?

 

[webster007]

I replaced the monitor with a standard 25" Sony trinitron. So it is just 15khz.

It is switchres that is causing the problem. The mame info screen for MK2 is also split but when it breify goes the the CMOS Cleared screen before the game, everything is good. Then back again to the split screen.

Is it a res that the Sony TV does not support or just a switchres setting?

 

[Retroman839]

the trinitron may not handel the mk res and it is putting vertical sync slighlty out







400 x 254 is a bit of an odd resalution ....




so most other games work ok ?

whats your set up jpac ? are you using trinitron scart jamma to scart?

 

[Retroman839]

looks like there must be a dial in the Trinitron for picture alignment and dial it up a bit and bottom should come round

 

[webster007]

The setup is vga to scart, windows 7 64bit and groovymame.

All the other games work apart from these, which i screen grabs the info.

Maybe the sony tv cannot handle vertical rates of below 55hz?

 

[Zipper]

I’ve seen this reported before. Check this....

http://forum.arcadecontrols.com/index.php?topic=157893.0

Midway games run at 54.70 Hz and TVs generally can’t handle that it seems (unless you can find vfreq adjustment). That link has a suggested fix.

 

[yoganuggy]

It looks like you don't have emudriver installed for groovymame as it is not running a super resolution for the horizontal res (768 width instead of 2500+) and usually groovymame will match the vertical res of the source but it's not in your screenshot.

 

[webster007]

Thank you yoganuggy

I forgot to install super res modes, now done.

Thank you Zipper

Used the CRT ranges in the arcadecontrols post and all is fixed.

The last little niggly thing is it cuts a few lines of graphics off at the bottom?