Problems with NeoGeo Games in MAME

[mrracer]

I'm using XP-pro SP2, With a ArcadeVGA card on a WG D9200 monitor with the MAME resolution tool (by MameWAH) I'm not using the autoresolution from Mame it self since I'm using the tool. I did change the refresh to 0 and syncrefresh to 0 because star wars and tapper were running to fast, once changed they reverted to how they would originally play. Art of Fighting, Metal Slug, Zed Blade and all other Neo Geo games are blacking out. What I mean is every time I'm playing the game, the game goes black (or screen) and I cant see for like a millisecond it seems to do it intermittently and I'm not sure what it is Not sure what had any affect on it , again any help is much appreciated, thanks.

[mrracer]

Well, reloaded the OS and drivers still same problems, anyone outhere have any idea what is causing problem?

[elvis]

I very vaguely recall an issue with Neo Geo stuff under MAME with real arcade monitors.  Something to do with a timing issue causing neo Geo stuff to not run at the correct refresh, and not being able to be stretched to full screen?

I'll have to dig around the mame.net and mameworld forums to see if I can find the info again.

From the ultimarc site:

Note about 224-line resolutions (eg Neo-Geo): The list does not contain any 224-line resolutions for the reason that is explained fully in the Arcade Monitor FAQ, basically arcade monitors cannot display these modes without top/bottom borders (otherwise the vertical refresh rate would be > 60Hz), so using a 240 line mode instead gives exactly the same result. (ie MAME inserts the borders instead of the resolution mode).

The ArcadeVGA card allows your PC to exactly duplicate the original game-boards video logic. To do this the resolution must match that of the original game, or be slightly higher (giving small borders). For the best gaming experience, you can over-ride MAME's choice of resolution. MAME often does not pick the best resolution. Here are some pointers: Choose a resolution that has an H and V value equal or slightly greater than the original game unless there is a resolution that is only a few pixels less, in which case choose this one. For vertical games on a horizontal monitor, choose a horizontal resolution which is about double the game resolution as you want side borders. The resolutions of 352 Horizontal are especially suited to vertical games. You will find that vertical resolutions of 240 and 200 or less are indistinguishable from each other. The reason for this is given on the arcade monitor FAQ page. A few games with a vertical resolution of between 301 and 450 will need Hardware Stretching because arcade monitors cannot display these resolutions, see arcade monitor FAQ for the reason.

Original page:
http://www.ultimarc.com/avgainst.html

Link to Arcade Monitor FAQ:
http://www.ultimarc.com/monfaq.html

[mrracer]

Thanks for the info. I did some fact finding and it turns out I had refresh to 0 and syncrefresh set at 0, because tapper, starwars and other games were running way to fast. I turned on refresh (set to 1) and left syncrefresh at 0. The Neo Geo games seem to be working fine now and the other games stayed running at their natural speed...