Don North <ak6dn at mindspring.com> wrote:
Found when I was going thru a box of DEC memorabilia
... an original
11/74 front panel (plexiglass only). You can tell it is from a 'true'
11/74 as it has front panel positions for the commercial instruction set
microengine (CIS uADRS, CIS DECIMAL datapath, and CIS DESCRIPTOR datapath).
Here's a pix:
http://www.ak6dn.com/stuff/1174.jpg (not the best
quality, done on a scanner, not by camera). I need to figure out a way
to get the LED positions to light up. Maybe I'll build a LED board and
hook it up to my 11/34...
Very nice!
However, a few things I've wondered about for a long time.
This is obviously a panel for a corporate cabinet. I've also seen a
picture of an alleged 11/74 that was in a corporate cabinet.
However, the one picture I've seen in real life (as opposed to on the
internet) of an 11/74, it was in full height 19" cabinets with the
traditional maroon/red color scheme.
Also, I am under the impression that a CIS was never completed. That
would have required the KB11-E. The only 11/74 CPU I know was done was
the KB11-Cm, which is a modified KB11-C (aka 11/70). This won't allow
you to add a CIS option. No place nor wiring for it.
Does anyone know *for sure* that the KB11-E was made, or might this
front have been a prototype for a possible KB11-E, but in reality used
just with a KB11-Cm?
(Oh, and for those of you who care... login to mim.update.uu.se as
guest/guest, and run RMD...)
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol