Cable Select vs. Master/slave settings

Tony Nelson tonynelson at georgeanelson.com
Sun Aug 7 19:53:31 UTC 2005


At 3:19 PM -0400 8/7/05, Gene Heskett wrote:

>Nice idea Claude, but can you tell us how to tell the difference
>between the cables so that we can properly identify them?

Just google on "cable select" (with the quotes) and you'll find that a
Cable Select cable has pin 28 connected to a ground wire at one device
connector (master) and not connected at the other (slave); normally this is
done by punching out a little bit of wire 28 (on a 40 wire cable) just past
the middle connector, so you'll see a little hole in the cable.  You'd also
find that, as normally a single device should be at the end of the cable
(slave) and a single device should be master, so using a Cable Select cable
with only one device is, umm, problematical.

If one must use a Cable Select cable for only one device and it doesn't
seem to work quite right at either position, I suppose one could just cut
the cable after the middle connector, which would make it the end
connector.  Cables are cheap.
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