In message <Pine.SUN.3.91.970714101129.4470B-100000_at_crl5.crl.com> classiccmp_at_u.washington.edu writes:
>
> I saw an interesting relic in the thrift store the other day...and IBM PC
> "Expansion Chassis" (I believe that's what it was called). It was
> basically an IBM PC case with two full height hard drives instead of
> floppy drives. It's model number was 5161 (if I recall correctly).
> Didn't bother with it, even though it is kinda unique.
Ah yes, the 5161...
It is/was a device for adding 6 more slots to a PC, PC/XT or Portable-PC
(basically any of the 8-bit bus system). The 5161 itself was a PC/XT cabinet
with an 8-slot passive backplane (OK, there was a 14.? MHz oscillator in
there) and a standard PSU. There were a pair of cards (the 'extender' and the
'receiver') and a 62 pin cable that linked them. You put the extender into one
slot of the 'host' system, the 'receiver' into the passive backplane, and linked
them together. You could put I/O or memory cards (although not graphics cards
AFAIK) into the remaining slots of the 5161.
One problem with buying one of these second-hand is that the extender card (and
often the cable) is almost always missing - it's been left in the host. And that
card is difficult to find.
Schematics, etc are in Volume one of the Options and Adapters TechRef.
> Sam
-tony
Received on Mon Jul 14 1997 - 20:24:00 BST