Re: modelines for xfree86 with official nvidia driver

The gtf calculator written by Andy Ritger has some serious flaws.   Don't 
use it.  Modes that operate under 38kHz are completely invalid.  Chances are 
X won't even clear them on loading.  This is a VESA issue.  The GTF standard 
never specified a minimum horizontal blanking time.  This was later 
corrected in the CVT standard. 

The gtf program written by Andy Ritger only supports very, very basic GTF 
calculations.  UMC at http://umc.sourceforge.net supports the entire CVT and 
GTF standard, and unlike Ritger's gtf, it will always generate a usable 
modeline.  Neither standard, however, were written with arcade monitors in 
mind.  Both were written to take advantage of very fast, modern, high 
resolution CRTs (or LCDs).  There are only two calculators that I know of 
that generate usable modelines for arcade monitors, and that's lrmc and 
advv. 


[iso-8859-1] Jos� Renato writes: 

> Hello guys! Thanks for your great help, Desmond. I´ll try to generate 
> some modelines.
> I just don´t know how many modelines I need to generate. As my arcade 
> monitor is horizontal
> I´ll try only horizontal modes. 
> 
> Before try your application, I tried the gtf modeline generator 
> http://sh.nu/nvidia/gtf.php to
> create some framebuffer resolutions, like this one: 
> 
> mode "608x262 60.00Hz 32bit (GTF)"
>    # PCLK: 11.23 MHz, H: 16.32 kHz, V: 60.00 Hz
>    geometry 608 262 608 262 32
>    timings 89062 40 -16 6 1 56 3
>    hsync low
>    vsync high
> endmode 
> 
> This mode can´t be loaded by fbset because there is a negative timing. 
> So, with ADVCFG
> and rivaframebuffer, the lowest plock I got working was about 8 MHz. Very 
> bad,
> because I got a screen like vertical games. So, my idea was to create more 
> fb modelines
> with gtf application, but without a success. Now it´s time to use YOUR 
> idea. 
> 
> To run under Xfree, I need to compile advmame with SDL, allright? So, 
> ADVMAME
> with SDL can select the modelines that I´ll generate with your 
> application or I need to
> do some other configurations? 
> 
> Thanks for you big help 
> 
> Keep mailing 
> 
> Gore Daimon 
> 
>> From: "Desmond Colin Jones" <jonesdes-mhe/[email protected]>
>> To: " advancemame-users-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org" 
>> <advancemame-users-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
>> Subject: Re: [advancemame-users] modelines for xfree86 with official 
>> nvidia driver
>> Date: Sat, 09 Jul 2005 17:18:47 -0400 
>> 
>> http://lrmc.sourceforge.net/ 
>> 
>> There shouldn't be any major bugs left, but who knows.  Be sure to use 
>> the
>> highpclock parameter, as nvidia's driver won't support modes under 12 
>> mHz. 
>> 
>> Just cut and paste the modelines directly into your configuration file. 
>> It
>> shouldn't matter how many monitors you're using, as long as the 15kHz one 
>> is
>> on the default vga/dvi.  15kHz modes don't work via tv-out.  I tried. 
>> 
>> [iso-8859-1] Jos� Renato writes: 
>> 
>>> Hello guys! 
>>> 
>>> After a lot of test with riva framebuffer driver for linux, I got the 
>>> same
>>> problem.
>>> So, I´d like to test if it is possible to make the xfree86 output
>>> something to my
>>> arcade monitor by using the official nvidia driver. 
>>> 
>>> I successfully setup a tv-out output for my 29" tv using higher
>>> resolutions
>>> (640x480 and above) with the twinview configuration and clone output.
>>> You can grab some information at http://sh.nu/nvidia and take a look at
>>> XF86Config sample.
>>> It´s possible to create another video output with "clone mode"
>>> to another monitor with the samevideocard too, as nvidia faq included in
>>> the
>>> official driver. 
>>> 
>>> So, my great question is: can I generate some modelines to generate
>>> another
>>> video output for an arcade low resolution monitor (15Khz)? 
>>> 
>>> I need a great help to put this on work. Can someone help me? 
>>> 
>>> Thanks. 
>>> 
>>> Keep mailing 
>>> 
>>> Gore Daimon
>  
> 
> 
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