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From: gregb@hpindda.cup.hp.com (Greg Buchanan)
Newsgroups: comp.sys.hp
Subject: Re: Asynch Port on HP9000 345
Message-ID: <4310160@hpindda.cup.hp.com>
Date: 20 Mar 91 22:08:19 GMT
References: <1991Mar18.162849.27463@cuff.uucp>
Organization: HP Information Networks, Cupertino, CA
Lines: 10

In response to the question about the 98644 card on an HP9000/S345.

Sorry, but 2400 baud is as fast as it can go on inbound without losing
data.  That is why the documentation tells you this.  The problem is
due to the UART used on the card only having a single byte buffer for
inbound data.  When the system gets busy processing the disk or other
I/O, it cannot answer the Serial Card interrupt before the single byte
gets overwritten.

Greg Buchanan,  HP Grenoble Network Divisions, Cupertino