Interesting Backplane

[Thad P Floryan]

In re: Roger Florkowski's comments about a cutout in his 3B1 ...

Mine has the same thing.  It is EXACTLY the correct size for a 50-pin
Centronics SCSI connector!  :-)  Even has the slots for the two screws.

Since the 3B1 doesn't have a fan in that location, it would seem that the
International cover would be the thing to get.  In fact, looking at the
drawing of the back of the International section of the UNIXPC Reference
Manual, there is a metal plate there with two screws fastening the plate
to hide the cutout.  The cutout is immediately to the right of the TTY000
RS-232-C port connector and the rightmost (of the two rear plastic cover
screws) fastens right smack dab between the RS-232 and the "other" cutouts.

That cutout is just NOT documented.  But it's there.  A perfect location for
a SCSI connector.  Now, just to locate "International" covers.  :-)

If anyone (in N.Calif) wants to bring their 3b1 to the May meeting of the
Bay Area AT&T Computers Users' Group, we can open it up.  I intend replacing
the clock battery in one member's 7300 with a socket and replacement battery
right there in the meeting (takes about 20 minutes), so we can open up
UNIXPCs "just to see what's there" while I talk about uucp and the UNIXPC.

Thad Floryan [thad at cup.portal.com (OR) ..!sun!portal!cup.portal.com!thad]