16 Apr
2011
16 Apr
'11
1:27 p.m.
Have a friend looking for Multibus parts, told him I'd post here in
the hopes that someone here might be able to help it out. Here's his
request:
"I need an extender board for a system that uses a multibus backplane.
(Multibus I, MBI, whatever you want to call it) I have a system that
I need to work on and obviously need one of these to work on the
boards while they're in the unit.
Actually, you may not _need_ an extender. I've worked on plenty of
devices for which I don't have the extender boards, and what I do is pull
the board of interest and tack-solder short wires onto the ppoints I am
interested in. Put the board back in place and monitor the free ends of
the wires with 'scope or logic analyser.
Then pull the board again and move the wires to new points, based on the
resutls fo the first measurements. Normally it only takes me 2 or 3
'goes' to find the faulty IC.
Obviously this doesn;t work for very high-speed stuff where the extra
capacitance of the test wires would be an issue. But I think it might
well be OK for most Multibus 1 stuff.
Here's a link to a pic of one similar to what I need:
http://www.vectorelect.com/Product/Extenders/Multibus.htm
I've not followeed that link, but if that;'s a product that's still
available, why not buy it?
-tony