Posted by powerjaw on September 10, 1999 at 00:57:27:
In Reply to: Re: monitor synchronization problem posted by scott oberg on September 09, 1999 at 12:23:19:
It might need the sync polarity swapped. Most arcade boards output a negative sync. Most arcade monitors accept both postive and negative syncs. On almost all of my monitors (about 20) there's an extra set of pins, so the pinouts look something like this:
1 - Red
2 - Green
3 - Blue
4 - Ground
5 - -H Sync
6 - -V Sync
7 - Ground
8 - +H Sync
9 - +V Sync
Does yours look anything like that? If not, I think that TSR will let you swap the polarity of the VGA output from your computer. I forget the switch, but it's listed in the /? screen.
Tim
: Good idea, but I already tried that (I had seen people have success with that as well...). What I didn't say in my original comments was that its far closer than it was before. When I'm at a dos prompt, the picture is stable, and I can tell where the cursor is (because it's always a single dash on a horizontal line). Everything else horizontally is stable, just not 'lined up' right, apparently.
: Any suggestions?
:
: : Maybe try using R,G,B and ground and twisting the H-sync and V-sync together and connecting it that way. I have heard of that before from others. Don't know if that works but maybe.
: : : I hope one of you exceedingly intelligent folks can help me out with this...
: : : I've just been trying to get my cabinet monitor to work, and I'm having some issues. Its a Toei AD-20 (I haven't seen anyone else with one of these yet- lucky me...). The input wires/connector on the monitor was unlabeled, so I assumed the 5 lines to be RGB Vert and Horiz. No go. serious horizontal imbalance (actually vertical, but I think the monitor used to be vert and they never changed the labels on the pots). Since I wasn't sure which was vert and which was horizontal at the monitor end, I tried each combination, as well as assuming that they were actually vert/horiz sync combo and ground. Nothing. Not knowing if I had a monitor or cabling issue, I 'mcgyvered' my cable to an old RGB monitor I had kicking around, and had the same problem. At this point I began to suspect an incompatable refresh rate or resolution coming from the video card (I was using Arcadeos with arcade display (NTSC) mode turned on), so I loaded up that little TSR VGATV driver. Worked fine on the old RGB monitor, but not on the Arcade monitor.
: : : What am I missing? Am I a complete dolt? (well, yah, but dolts can learn too...).
: : : I appreciate any suggestions that can be offered. I'm stumped.