On Sun, 7 Mar 2004, Meghazi Fabien wrote: > Hi all, > > I'm currently trying to start an X server in order to display low resolution > on an arcade monitor. The monitor is correctly plugged to the pc with special > hardware which amplify the vga signal for this purpose. The monitor > horizontal frequency is 15Khz, horizontal is 60Hz and the clock freq is > 7.16Mhz. > This is a standard arcade resolution monitor, you can find the common specs of > these monitor at this address : http://www.klov.com/monitor.html > > I made a modeline using http://xtiming.sourceforge.net/ > Modeline "336x240@60" 6.44 336 368 392 424 240 245 248 253 I don't know of any PC video hardware that supports pixel clocks that low. Mark. > > The dot clock frequency of this modeline (6.44) is not possible to reproduce > with my nVidia Riva TNT2 according to X. > /var/log/Xfree86.0.log says "bad mode clock/interlace/doublescan" for my > modeline. It also say for my gfx card : Clock range: 12.00 to 350.00 MHz > > If X think that the lowest pclock frequency for these cards is 12.0 then I > understand that it refuses this modline wich uses a 6.44 pclock frequency, > but the thing is that I often read that the Nvidia Riva TNT2 is ok to use for > this purpose (making a mame cab), I read that in advancemame website, in > easymamecab (http://easymamecab.mameworld.net/html/hardware.htm), and other > arcade related sites, ... In easymamecab they talk about the use of this card > with advancemame. But i don't understand what advancemame could do that X > couldn't do ? If I ask X to use a 15Khz resolution and it tells me that the > card pclock can't handle this, why advancemame could be able to do this ? (i > didn't tried advancemame because I really want to use X in order to make my > own front-end) > > PS: I also tried a Matrox G200, the problem is the same. > > -- > Fabien Meghazi > _______________________________________________ > XFree86 mailing list > XFree86@xxxxxxxxxxx > http://XFree86.Org/mailman/listinfo/xfree86 > _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
