This is the short description:
Part Number =3D MC1806P
Description =3D 2-Input AND-Function Logic Gate
Thanks, (and thanks to others who've offered me data. This really is a
great list!).
An AND gate makes sense now that I've realised that the 9830 has active
high data output lines and active low data input lines on the I/O bus
(!). This gate needs to be a non-inverting type where the output can be
forced low -- that is an AND gate.
-tony