Alvin Tan wrote:

> The Dip Switches are used for setting the ID of the unit to be tested.
> By replacing the dip switches, we don't have to pull the card each
> time and set the dip switches for the ID of the unit being tested.

  This sounds OK.

> I was thinking of using (as Peter Peres suggested) 5 x CD4091 (8 bit
> shift registers with latches)

  So far, so good.

> and then it's output is used to control 10 x CD4066 (quad bilateral
> switches).

  Hey!  You've lost me there! what would you use quad bilateral switches
for?  This ID system is set by analog components?  Resistors?
Capacitors?

--
  Cheers,
        Paul B.