proud (soon to be) owner of a VAXstation 3100 - test-drb@ccmp.vtda.org

21 Sep 2012

...

ON top for the reason of..

What flavor of 3100?  It makes a difference.

Do you mean it makes a difference as to what signals appear on the DA-15?

The 3100 Cameron was asking about the video signals on and the 3100 I have
which does not seem to pass the keyboard and mouse signals to the DA-15
connector are both model 76's.

The 3100 I ran double headed some years ago was probably a model 30 or model 40
I've still got it somewhere but I haven't run it for a while now. I can't
remember whether it passes the keyboard and mouse signals to the DA-15.

My VAXStation 2000's definately pass the keyboard and mouse signals to the DA-15
as there is nowhere else to get them :-)

...

I ask as I have 8 of them and no more than two of any variant.
The VS3100 series was not a monolythic model but the generic designation
for a group of system. 

I have a few Microvax 3100's but I don't think I have any other variations
of VAXStation 3100.

Regards,
Peter Coghlan.

...

Peter Coghlan wrote:
   Got it.
I'll verify the connector when it arrives. I do know that I have a
 DA-15 to 3BNC connector around here, though I *thought* it was for a
 Macintosh. Do you know the pinout? When I look for DA-15 video pinouts I
 keep getting Mac ones.

 (Do the Mac people not call it a DB-15? :-)

 It's the same as for a VAXstation 2000 and I have a manual for that which
 has the pinouts. Hmmm. Perhaps it's only the VS2000 that also passes the
 keyboard and mouse signals through that connector - there is no room for
 more connectors on that machine.

 The video signals are:

 1.  Red
 2.  RGB ground
 10. Green
 11. Blue

 There is also a monochrome video signal available from the frame buffer on the
 system board which is not usually used if you have one of the optional colour
 graphics cards:

 3. Monochrome ground
 9. Monochrome video

 If you make up an DA-15M - DA-15F adapter to get at these, you can probably
 run your VS3100 double headed. I've done it with a GPX graphics card and VMS.
 I assume it is also possible with an SPX graphics card. I can't see why not.

 (I remember our sales guy's jaw nearly hitting the floor when I showed him the
 Decwindows mouse pointer moving from one monitor onto the other :-)

 Regards,
 Peter Coghlan.