Jeff,

I think you have a couple of issues here:

1.  If you are using an HP2392 terminal, the second port (unless you have
physically purchased a parallel port for it) is serial only.  Only the
700/92-94-96-98 terminals have a parallel printer port.

2.  Doesn't the DJ820 need a bi-directional IEEE-12?? parallel cable?  I
purchased for myself a DJ672 color printer two weeks ago and was required by HP
warrantee to purchase this special cable.  If this is the case, I don't think
the terminal supports the bi-directional protocols.

I hope this helps you.

Marshall Medoff, ITA, Inc.
Arlington, Virginia