Rick,
Thanks for your reply.
Actually, this is an old Quantel printer that was working in some sort of
"polling" environment.
On the back of this beast I found one DB25 female connector and a label "HP
2563A".
I assumed (don't we know that an assumption is a mother of a screw up :))
this is an HP printer.
According to HP website they never made such a thing, although I found some
postings in this
newsgroup mentioning such a model.
My task is to set the printer up on SCO UNIX.  It sort of works but has a
flow control problem.
All the configuration of the printer suppose to be done by pressing "Config"
and "F. Adjust"
buttons on the front panel (which also has a 2 digit numeric display),
referring to the printer manual for the meaning of the numbers displayed.
Needles to say that I don't have a manual.
I was wondering if somebody knows how to configure such a printer for
software flow control
(if it's possible at all).
Thank you.

"Rick Gilligan" <[log in to unmask]> wrote in message
news:Pine.GSO.4.10.10006271334560.9941-100000@sun.case.net...
> > Does anybody know how to set up HP 2563A (a very old dot matrix printer)
> > for software flow control?
>
> I am assuming you have an HP 26067B RS-232/422 serial interface in the
> printer.
>
> Set the low order bit in configuration byte 20 for xon/xoff flow control.
>
> Rick Gilligan
> Senior Software Specialist
> Computer And Software Enterprises, Inc.
> E-mail: [log in to unmask]
>
>