On Thu, 10 Sep 1998 James Kerr <[log in to unmask]> wrote
>I was searching and I have found an adapter to convert a regular monitor
>plug into a HD15 plug so it will fit into this monitor which is an older
>fixed frequency 21"er, I was wondering does anyone know if this will work
>with a regular video card? I saw special video cards for some of the older
>Sun monitors and they were like $300. But someone I asked had a hunch that
>this monitor with this type of connector on it, which looks like the regular
>monitor plug (13W3?) with three small coax looking plugs on it also, I would
>really like to get this monitor to work on one of my PC's, that would be
>awesome, thanks

Excuse me if I have a little problem getting my head round this one :-)

This is an IBM PC list, so around here a 'regular' monitor plug
is PC VGA/SVGA and _is_ high density D-type 15 way,

(Mutatis mutandis, 'older' PCs would be  MDA/CGA/EGA D9, unless
you had something like say an AT&T 6300 [Olivetti M24]
which is 'proprietary' not 'regular'.)

So how would converting a 'regular' plug to a 'HD15' plug
help it fit into an 'older' monitor?

Does your older monitor have a high density 15 way socket?

Apparently not, since you say it "looks like the regular
monitor plug (13W3?) with three small coax looking plugs"

You seem to say you want to put a 15 way  plug 'into' a 13W3 plug,
so now I don't even understand the genders.

There's an amusing limerick that ends
"who does what and with what and to whom" but that
kind of confusion doesn't help our engineering along :-)

It's a good idea to give a little clear mechanical description
rather than rely on on vague expressions of an assumed cultural norm.

"Tommy's pinout collection"
describes the 13W3 connector as follows...
---
Sun
"13W3" is an unusual connector combining a
10-pin D-shell and analog three video conductors:

                                 gray/          1  gnd*
        red   *   *              green blue     2  vertical sync*
         |   1o  2o  3o  4o  5o    |     |      3  sense #2
        (O)                       (O)   (O)     4  sense gnd
            6o  7o  8o  9o 10o                  5  composite sync
             *   *                              6  horizontal sync*
                                                7  gnd*
        * Considered obsolete, may not be       8  sense #1
          connected.                            9  sense #0
                                                10 composite gnd

   The codes for the three monitor-sense bits are:

        0 ???                   4 1152 x 900 76Hz 19"
        1 reserved              5 reserved
        2 1280 x 1024 76Hz      6 1152 x 900 76Hz 16-17"
        3 1152 x 900  66Hz      7 no monitor connected

See
http://cvs.anu.edu.au:80/monitorconversion/ and
http://rugmd0.chem.rug.nl/~everdij/hitachi.html
for info on attaching old workstation monitors to VGA boards.
---
"alt.comp.hardware.homebuilt FAQ" says...
The following links provide information how to use workstation monitors on
PCs:

   * http://madison.tdsnet.com/video/
   * http://rugmd0.chem.rug.nl/~everdij/con.txt
   * http://www.paranoia.com/~filipg/HTML/REPAIR/F_Sync_Green.html
   * SVGA-Sun
     ftp://ftp.cs.unc.edu/pub/users/mueller/sun.faq
---
I can't vouch for these URLs, but I hope the description
of this ('unusual' - Tommy) connector will help you identify
the scan resolution and refresh rate of your GDM-1962B,
then you may be able to select a compatible mode
on your IBM PC video adaptor.

If it is a fixed frequency monitor it is important to find out the
correct horizontal scan frequency, because the EHT generator may be
designed like a TV set as a flyback converter in the horizontal
deflection circuit tuned to a harmonic of that frequency. If it
varies more than a few percent it may go off tune, become
inefficient, overheat and burn out. Brightness and focussing will
probably be poor too.


Len Warner <[log in to unmask]> http://easyweb.easynet.co.uk/~len/ ICQ:10120933

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