VideoLogic GrafixStar 300 card clock settings

VideoLogic GrafixStar 300 card clock settings

Post by Harlan Harr » Thu, 14 Dec 1995 04:00:00



Hello,

I'm trying to configure XFree86 on my Linux system, and have been having
severe problems getting the VideoLogic GrafixStar 300 card synchronized
properly. It doesn't appear to be in any of the FAQs or HOWTOs, so I'm
wondering if anyone has any "pre-press" info about it.

It does have the S3 Trio64 chipset, which includes a programmable clock
chip, but I can't seem to tell which one. Anyone know where I can look?

No matter what I do (except run in 320x200 VGA), I get several dozen white
vertical lines on the screen and a corrupted image.

I'm using the XF86Config file as generated by the xf86config script, and
I'll include relevant portions below. (although it'd be much easier to
cut & paste if I had X-Windows... :/)

Any tips on how to figure out the clock chip info or timings would be
greatly appreciated.

Thanks,

 -Harlan

Section "Monitor"

    Identifier  "My Monitor"
    VendorName  "Austin"
    ModelName   "Unknown"

# Bandwidth is in MHz unless units are specified

    Bandwidth   80.0
    HorizSync   31.5 - 64.3
     VertRefresh 50-90


Modeline "640x400"     25.175 640  664  760  800   400  409  411  450

Modeline "640x480"     25.175 640  664  760  800   480  491  493  525

ModeLine "800x600"     36     800  824  896 1024   600  601  603  625

Modeline "1024x768"    44.9  1024 1048 1208 1264   768  776  784  817 Interlace

Modeline "640x480"     31.5   640  680  720  864   480  488  491  521

Modeline "800x600"     40     800  840  968 1056   600  601  605  628 +hsync +vsync


Modeline "800x600"     50     800  856  976 1040   600  637  643  666 +hsync +vsync

Modeline "1024x768"    65    1024 1032 1176 1344   768  771  777  806 -hsync -vsync


Modeline "1024x768"    75    1024 1048 1184 1328   768  771  777  806 -hsync -vsync

Modeline "1280x1024"   80    1280 1296 1512 1568  1024 1025 1037 1165 Interlace


Modeline "1024x768"    85    1024 1032 1152 1360   768  784  787  823

Modeline "1280x1024"  110    1280 1328 1512 1712  1024 1025 1028 1054


Modeline "1280x1024"  135    1280 1312 1456 1712  1024 1027 1030 1064

EndSection

Section "Device"
        Identifier "S3-Trio64 (generic)"
        VendorName "VideoLogic"
        BoardName "GrafixStar 300"
        VideoRam        2048
        Chipset "s3_generic"
EndSection

 
 
 

1. Grafixstar 300 clocks?

Can anyone tell me what clocks the Grafixstar 300 supports
(it's based on an S3 Trio64), or more specifically, whether
it's capable of supporting 1152x900 at 61.8kHz vert and 66Hz horz?

(I'm looking for a cheap acclerated VLB card that will drive
a Sony/Sun GDM-1604-40 monitor, and I can get one of these
cards for 35 pounds).

Is there any DOS-based diagnostic program for working this
stuff out?  There used to be something called clocks or similar
a few years ago...

Thanks,

Chris

--
Chris Hand, Senior Lecturer             | Dept of Computer Science,

   WWW: http://www.cms.dmu.ac.uk/~cph/  | LEICESTER, UK   LE1 9BH            

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