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Sigma LaserView problem

Sigma LaserView problem

Post by Robert J Bro » Sun, 12 Mar 1995 10:13:08



    Robert> I am experiencing a strange symptom with my Sigma Designs
    Robert> Laser View Plus display system.  I linked the XF86_mono
    Robert> driver to use the sigmalaserview code only, and set my
    Robert> memory base to 0xd0000, the default for the display
    Robert> adapter.  I can get X to come up and run, but whenever I
    Robert> move the mouse, it leaves dirty footprints -- mostly black
    Robert> pixels are stored where the mouse moves, but only in
    Robert> horizontal bands.  The bands appear to be about 16 pixels
    Robert> high, and are capable of extending all the way across the
    Robert> screen.  They are separated by a significantly larger area
    Robert> of unaffected display real-estate.  It looks like the
    Robert> unaffected bands might be 128 pixels high, but I have not
    Robert> yet measured this.

Actually, I measured this last night by executing 'xsetroot -mod 3 3'
and counting the pixels against the graph-paper-like background.  The
black bands are indeed 16 pixels in height, and they occur starting at
the 48th pixel row from the top of the screen, and continuing for 16
pixel rows.  Thus the pattern repeats every 64 pixel rows.

    Robert> I intend to pull the display board out and clean the
    Robert> contacts, check the seating of any socketted chips,
    Robert> etc. as I suspect this may be a hardware problem.  I have
    Robert> used this display for 6 years under Interactive ISC 386/ix
    Robert> Unix and X11R3, without any problem, but one never knows
    Robert> when hardware could get sick.

I tried cleaning board edge connector contacts, and changed which slot
the board was plugged into, just in case the motherboard connector was
bad.  I also tried running with turbo mode off -- at 8 MHz -- and
nothing made any difference

    Robert> If anyone has experience with this board under XFree86 or
    Robert> any other situation and has seen anything like this,
    Robert> please let me know how you fixed it.  Thanks!
--
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1. Q: Linux, XFree2.1, XF86_Mono, Sigma LaserView, black screen

Hello there,

I have recently acquired a Sigma L-View 19" monochrome dsiplay and
accompanying interface card. I can get it to work with DOS and Windows 3.1
but, tragedy, not with XFree 2.1 for Linux 1.0.8 (Infomagic April '94,
slackware installation).

It is the only display that I have, no VGA etc installed anymore, I replaced
it with the sigma. I mainly use my system for text processing, spread sheets
and programming.

The steps that I took:
* removed the old SVGA server
* got the linkkit
* modified the site.def file to only compile the XF86_Mono server, selecting
  the sigma driver only
* made a symlink from XF86_Mono to X
* Updated Xconfig to the following:

  bdm2
    chipset "sigmalview"
    membase 0xA0000

This last option is because I needed to select 'lvasetup a' to get everything
up and running for Win + DOS.

Now, when I run startx, X starts and my display goes black :-(
X seems to be active (it responds to mouseclicks. I can notice
this because of the harddisk light). After zapping X (Ctrl, Alt, Bsp) the
messages indicate that the Xconfig file has been read, Sigma had been selected
and that 2 256K banks where detected.

The question: how can I get my windows to appear?

Is there a settings file of the old SVGA server that causes black to be
displayed black, and white to be displayed white? Any idea?

Thanks.

Marcel Koelewijn
-------------------------------------------------------------------------------
Marcel Koelewijn                | Telephone : +31 50 851146
PTT Telecom B.V.                | Telefax   : +31 50 855310

P.O. Box 188                    | DISCLAIMER: This Statement is not an official
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-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
Marcel Koelewijn                | Telephone : +31 50 851146
PTT Telecom B.V.                | Telefax   : +31 50

P.O. Box 188                    | DISCLAIMER: This Statement is not an official
NL-9700 AD Groningen            | statement from, nor does it  represent an
The Netherlands                 | official position of, PTT Telecom B.V.
-------------------------------------------------------------------------------

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