Alright problem with vertical hold on Mame cab

[GMZombie]

ok i have a 33" monitor a pentranic chassis i believe 1431 and well when i run mame on it the vertical hold will not stay. I have an arcadevga card that i use too. I have tried to mess with the vert hold with no luck...it only slows it down...any sugesstions

[dabone]

How do you have it wired?

VGA                                  Monitor
1-red                                RED
2-green                            Green
3-blue                               BLUE
7-GND                               GROUND
13&14-Syncs                     Composite Sync (Negative)
SHIELD                             GROUND


Later,
dabone

[GMZombie]

the cable is from Ultimarc so i know its using the negative sync...i have it wired just as you say. here is the thing though when i hooked up the jamma harness that was in the cab to a game it stayed the same and didnt have a problem...im thinking its the resolution problem in windows...i think the monitor dosent like the 640x480 as it is just a cga monitor. But i though with the arcade vga card i could hook up to a normla monitor without having problems....there jmust be something i cannot see at this point...im gonna research it a bit more but if anybody has a answers to this feel free to shout out.

[dabone]

The cable does nothing to determine sync.
That is a function of the card only.



Did you make sure to combine the sync wires on your monitor??

Or wire up to seperate syncs?


It sounds like you don't have the vsync wire connected.


Are you using a video amp?

It has a sync combiner that works well, some monitors you have to use a circuit to comine the syncs for.

Later,
dabone

[stellarola]

Yea, I had the this problem a few days ago, the vertical hold...well wouldn't hold still . After about 20 aggravating minutes later.. I combined the syncs and what do you know... SUCCESS!!       

[GMZombie]

well i did combine them...but i will recheck as i used a but connector and sometimes they can get loose i guess..ill reply back later as the machine is at my uncles and im goin out there today

[GMZombie]

ok i did get the video to stop rolling and i did get most of the resolutions to the specs that i wanted....its all cool now thanx for your help