help! Need tutorial to get 288 line games to display right on horiz cga monitor

[m_mcgover]

Sorry in advance if this has been answered before, but I have not been able to find it all together. 

Can someone step me through the mala/mame/ini changes I need to make to make 288 line and greater vertical games playable without loss of lines or squishing at screen top/bottom on my horizontally mounted CGA monitor?

My machine has a 25" wells-gardner k7000 series cga-resolution monitor.  I am using the newer Arcadevga card to drive it.  Mala is my frontend.

I know there are a number of steps, which include fiddling with vertical size and generating .ini files for every game, but I can't seem to find the right combination.  The best I am able to do is get a vertical game like pengo have the bottom really squashed.  Curiously, the top of the screen seems to be undistorted and completely on screen.  I cannot reduce the vsize any more (already at its limit), so what can I do?  Is there a magic combination of settings in the game.ini file that will remedy this?  Is there someother monitor knob I can adjust besides vsize and vpos?

Please someone provide a detailed step by step.  Thanks in advance!

[Minwah]

It sounds to me like you have adjusted the vertical size down so much it is distorting the image...perhaps an issue with this type of monitor(?)

[m_mcgover]

I'll try and re-adjust size back up to see if that helps.  I'm just confused since other appear to be able to get this to work...

[Ken Layton]

And the monitor is freshly capped? If so, the also adjust the 50/60 control as shown here:

http://jstookey.com/arcade/WG_25k7191/

[m_mcgover]

Ken-  Thanks for the reply (and the link).  No, the monitor is not freshly capped.  I assume I can still try adjusting the 50/60 to see if that improves things?  I'll give it a shot tonight.  Thanks!

[NOP]

I think you need this page:

http://ultimarc.com/avgainst.html

which shows you all the various mame.ini steps to tweak, and has a link to the arcadevga resolution tool to generate the .ini files for each game.  Worked great for me!  I was able to get a few games that had previously come up only as a garbled screen to show properly.

-jeff!

[m_mcgover]

Yes, I ran Gavin's utility to generate .ini files for each game, prior to my original question.  I guess I can go back and double check that the resolutions suggested by the utility line up with the vertical games and report back.

[m_mcgover]

Ken was right.  I needed to adjust the 50/60 pot on the monitor to correct what turned out to be mild vertical fold over on the bottom which prevented me from getting the vertical games to display correctly.  I am now able to get pretty close with just the slightest bit of cut-off.  Thanks again to all (and especially Ken) for your suggestions!