Software Support > GroovyMAME
None-interlaced modelines for Xorg(Linux)
Calamity:
--- Quote from: Lomaxx on April 03, 2012, 08:46:38 am ---Rehi, Calamity.
I probably do mean "composite sync", yes. ;)
I mean those Modelines that do not have the "interlaced" option set at the end. The once I use look like this one:
--- Code: --- Modeline "408x288x50.08" 7.875000 408 424 464 504 288 293 296 312 -HSync -VSync
--- End code ---
So far I only know of these two types - with and without "interlaced" - of which i prefer the ones without. But pretty much any mode without flickering is welcome. =)
--- End quote ---
Lomaxx, I think there's a confusion going on here. What you mean is progressive modes, that's the opposite to interlaced modes.
Whenever you see the "-HSync -VSync" in a modeline, it means the sync signals are separated. A composite sync modeline would have a single "Csync" param instead of those.
On the other hand, I strongly recommend you to use Switchres for modeline generation instead of lrmc or anything else. There's no possible comparison.
Ansa89:
--- Quote from: bleargh on April 03, 2012, 01:11:20 pm ---XFree86 modeline generator maybe?
http://xtiming.sourceforge.net
Years ago, when I first started building my MAME cabinet (some eight or nine years back), there was a resource I used to help create all of my modelines. For the life of me I can't remember WhatTF it was though. :(
--- End quote ---
The online modeline generator is more or less the same as "lrmc" or "umc" (imho).
BTW, Lomaxx asked for a modeline without interlace (for flickering problems), so the topic focus is on how get a "highres" (like 640x480) not-interlaced modeline.
Calamity:
--- Quote from: Ansa89 on April 03, 2012, 01:18:49 pm ---BTW, Lomaxx asked for a modeline without interlace (for flickering problems), so the topic focus is on how get a "highres" (like 640x480) not-interlaced modeline.
--- End quote ---
Well that's obviously impossible within the 15 KHz / 50-60Hz range.
Horizontal resolutions are arbitrary, use the highest that looks fine. You'll need to use vertical resolutions like 224p, 240p, 248p, 256p, 264p, 272p, 280p, 288p (p stands for progressive). Refresh rate doesn't need to be restricted to 50 Hz, the TV will probably support 60 Hz too (probably not up to 256-288 lines).
Ansa89:
So the max possible resolution should be 400x300 at 49.76Hz (hoping the tv is a bit tolerant with refresh rate).
The alternative is 400x288 at 51.74Hz (but in this case we broke the 4:3 proportion).
Calamity:
400x300@49.76 is about 16KHz, the TV will likely support it but with huge vertical overscan, I don't think you can fix that overscan with the service menu. On the other hand, you should be able to adjust some arcade monitor to show that amount of lines.
--- Quote ---The alternative is 400x288 at 51.74Hz (but in this case we broke the 4:3 proportion).
--- End quote ---
If aspect matters you can use 384x288.
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