[Info-vax] vax4000

[Steven Schweda]

On Oct 13, 8:41 am, koeh... at eisner.nospam.encompasserve.org (Bob
Koehler) wrote:

> [...]  you may need to design the interface
>    using analog logic, not digital, [...]

   I'd love to see a reasonable definition of "analog logic".
My slide rule didn't have True and False on it.  (It _did_
have a "1", but not a "0", unless you count one on the "L"
(log) scale.)

   But back to the real question, ...

   A Web search for B400X, R400X, and M9405 should give you
some idea of the hardware involved.  I doubt that the cables
were anything special.  I never tried it, but I suspect that
a (matched) pair of old SCSI cables (preferably shielded?)
could do the job of connecting this stuff.

   Are your "drv11 cards" actually DRV11-WA cards, or some
other DRV11 variant(s)?

   Personally, unless I already had all this hardware lying
around, I'd be looking for some other way to have fun.
(Something slightly more useful, for example, might be an
Alpha LR driver which could do input as well as output on a
parallel port.)