QBus termination?

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Wed Feb 9 02:10:38 2005

On Feb 9 2005, 0:24, Roger Merchberger wrote:
> Rumor has it that Vintage Computer Festival may have mentioned these
> >Hmmm. Can't tell exactly what's going on here but my board contains
> >jumpers, just resistors. The resistor (or whatever was there)
across W2
> >has been cut off. W4 has a brown thing that looks like a resistor
> >with one black stripe around the body. Is that a straight-through
> >strapping type device?
> Yup -- otherwise oxymoronically known as a Zero-Ohm Resistor.
> Depending on the clearance you may have on the board, you could
> that and solder in a 2-post terminal block and use a jumper (shunt)
if it's
> close enough, or if not you could wire-wrap the posts if you wanted
to more
> easily change the circuit path.

The pads will be about 0.4" apart, but you can get terminal posts to
fit. Wire-wrap was more common, and there will be enough clearance for
short wir-wrap posts. A common trick, though, was to clip the lead at
one end of the zero-ohm link, close to the board, and bend the zol
slightly sideways; then it can be bent back and re-made with a small
blob of solder if necessary.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Wed Feb 09 2005 - 02:10:38 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:37:36 BST