Xref: utzoo unix-pc.general:3515 comp.sys.att:7217
Path: utzoo!mnetor!motto!ecijmm!jmm
From: jmm@ecijmm.UUCP
Newsgroups: unix-pc.general,comp.sys.att
Subject: Re: Anyone see the "extender" board for the UNIX pc?
Keywords: extender board, bus extender
Message-ID: <896@ecijmm.UUCP>
Date: 7 Aug 89 18:48:52 GMT
References: <170@alps.UUCP>
Reply-To: jmm@ecijmm.UUCP (John Macdonald)
Organization: R. H. Lathwell Associates, Elegant Communications, Inc.
Lines: 26

In article <170@alps.UUCP> lenny@alps.UUCP (Lenny Tropiano) writes:
|Paging through the UNIX PC Reference Manual, I happened to see something
|of interest ...  In the section on the Tape controller board they
|mention doing adjustments to the board.  What they said in the 
|instructions is to:
|
|...
|1.	With power off, remove the Floppy Tape Controller board and
|	insert an _extender board_ in its place.
|...
|
|Now this sound useful for those hardware hackers out there (Gil, you
|listening?) ...

This sounds like something I've seen for Multibus.  Its a card with
an edge connector on one end, a matching edge socket on the other,
and a lot of straight-line traces between.

It allows you to have a board in a running system and still get probes
to various points for debugging purposes.  There might be a few extra
features (e.g. a switch to disconnect the board from the bus).

Apologies if you already knew this and read the subject as Physical
Extender rather than System Capability Extender.
-- 
John Macdonald