Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!sdd.hp.com!hp-pcd!hpfcso!rjn
From: rjn@hpfcso.FC.HP.COM (Bob Niland)
Newsgroups: comp.sys.hp
Subject: Re: Asynch Port on HP9000 345
Message-ID: <7370344@hpfcso.FC.HP.COM>
Date: 19 Mar 91 22:05:55 GMT
References: <1991Mar18.162849.27463@cuff.uucp>
Organization: Hewlett-Packard/FSY Ft.Collins,CO,USA
Lines: 28

re: > We have a HP 9000 model 345...

> ...that we use for access, via UUCP, to the world.  There is no expansion
> chassis and we are confined to the 98626 serial interface.  The problem is
> that in the termio definition in section 7 of the manual the following
> quote appears.

> "Data Loss can occur with the HP 98626/98644 serial interfaces if the
> effective combined data rate for all installed serial interfaces exceeds
> 2400 baud (for example, two interfaces running at 1200 baud and a third at
> 300 baud is equivalent to 2700 baud combined)"

Are you using an actual 98626A plug-in card, or the built-in serial
interface of the 345?  If you are using the built-in "98626", it has some
advanced features that were turned on at release 7.05, and for which a
7.0/7.03 patch is available.

These features include a 16-byte FIFO and CTS/RTS bi-directional hardware
flow control.  With both enabled, you should be able to operate reliably at
speeds above 2400 bps.

Contact your HP support representative for a copy of the patch.  If they
don't have it, they can obtain it from me via email (it is not on our normal
patch system).

Regards,                                              Hewlett-Packard
Bob Niland      Internet: rjn@FC.HP.COM               3404 East Harmony Road
                UUCP: [hplabs|hpfcse]!hpfcrjn!rjn     Ft Collins CO 80525-9599