[Info-vax] Two VGA graphics cards in Alphastation XP1000

Steven Schweda sms.antinode at gmail.com
Thu Sep 16 17:27:40 EDT 2021


> I have a "PBXGK-BB" graphics card in an XP1000 box [...]

   Running some version or other of VMS?

> [...] only one graphics module can have VGA enabled." There is a
> jumper for that.

   I can't see your "the manual", so I know nothing, including whether
that statement applies to VMS, but it might refer to one VGA _console_,
not a more general limitation on 15-pin D connectors.

> How does one define a multihead system on OpenVMS, and what are the
> limitations? [...]

   RTFM?  There should be loads of old DECwindows documentation lying
around.  Look at SYS$MANAGER:DECW$PRIVATE_SERVER_SETUP.COM/.TEMPLATE?  I
quote:

$ ! The simplest thing that can be done at this point, and the reason for
$ ! this call is to select multi-head.  This is done by setting the symbol
$ ! DECW$MULTI_HEAD to logical True.  And this is what the example does.

> [...] I'm confused. Should I even try?

   I can think of one reliable way to find out.

   I wouldn't bet on support for different cards, but what do I know?



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