What settings for vertical games on horizontal, soft15k arcade monitors?

[Lilwolf]

What resolution are people using when playing vertical games on horizontal arcade resolution monitors?  I have a 27" betson multisync and can go 640x480 but at 30hz... but prefer the look of 15hz... I've been using 640x240 for OK results...  for 240x320 resolutions though, its cutting down 80 lines.

Anyone find any resolution looking better?

[Bramlet]

i have 19'' horizontal, would like to know the pro answer also.  looks like i'm using 400x256 right now. i had resolution issues and i just picked at random until something looked ok. vertical games are pretty tiny, no idea if there are better options

[boardjunkie]

I went the rounds with this and never found a way to make it perfect. The best I could do was use the "bilinear filtering" option which makes text and certain motion objects look better. Its still a workaround tho...not optimal. You take a hit in the "crispness" dept. when that is enabled. Seems like I used a different res also....I forget where I had it looking the best.

Using Groovymame supposedly fixes the problem by switching res on the fly on a game-game basis. The documentation is non existant tho, so I haven't bother'd with it as of yet.

[Gray_Area]

It's simple. The original arcade multisync used for MAME was the D9200. It remembered geometry - but it had a gap between 16.5 and 24khz. So the stock 15khz mode for, say, Pac-man is 352x288@50hz. You sacrifice refresh. If your monitor can do 15-24khz continuous, then you end up at 18-20khz. I forget the actual modelines those are.