Ms. Pac-Man, Dig Dug, and other tall games with groovymame

[Tzakiel]

My groovymame is picking a resolution for these 288 line-tall games which is causing my TV to flip out and scroll wildly up and down. I'm not sure what it's picking because it's too scrambled / moving too much to see. Is there a way to tell groovymame to use a specific resolution for these games, rather than the auto one that my TV won't support? I read it's possible to use a 640x480i or some other sort of compromise for these tall games, even though it won't be native, but I can't seem to find instructions as to how to set up a specific resolution choice for a single game. I'm very happy with the auto settings for all other games - it looks great!

[Calamity]

Looks like yours is a NTSC only TV.

In mame.ini, edit the following options:

monitor custom
crt_range0 15625-15750, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 256, 448, 512

The remarked value is the highest number of lines GroovyMAME will use as progressive, above that it will use interlaced modes.

[Tzakiel]

Thanks Calamity.  I will try that tonight. I should note donkey kong and some other vertical games work fine. I assume since DK is 256, it will still work in progressive as that is the upper limit set in the ini.

[Tzakiel]

Happy to say this worked... thanks for the clear answer I obviously needed!

[Tzakiel]

This has cropped up again, not sure why. I have the same fix in the ini file still but the old problem is back. I think the only thing I do differently now is I use magic resolutions to fix hyperspin not loading. Any ideas why this has come back?

[Calamity]

Please post a log.

[Tzakiel]

Calamity - I was able to fix this by looking at the vmmaker ini and I found the custom monitor setting in there still had the "288" number in the line. I changed to 256, ran vmmaker again, rebooted, and now it's working again.  Thanks!