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Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!tektronix!reed!omen!caf
From: caf@omen.UUCP (Chuck Forsberg WA7KGX)
Newsgroups: net.micro.pc
Subject: Re: Running IBM serial boards at 19.2KB
Message-ID: <143@omen.UUCP>
Date: Sun, 21-Apr-85 12:52:03 EST
Article-I.D.: omen.143
Posted: Sun Apr 21 12:52:03 1985
Date-Received: Tue, 23-Apr-85 06:06:42 EST
References: <145@cernvax.UUCP> <138@omen.UUCP> <535@cyb-eng.UUCP>
Distribution: net.micro.pc
Organization: Omen Technology, Portland
Lines: 19

>> The standard IBM serial adapter using the 8250 UART, as well as the
>> serial ports on expansion boards such as AST SIXPACK can be programmed
>> for 19200 and 38400 bits per second.
>
>Huh?  I quote from page 1-238 of the I.B.M. PC2 Technical Reference manual:
>
>	Note:  The maximum operating frequency of the baud generator is
>	3.1MHz.  In no case should the data rate be greater than 9600 baud.

Just talk to a user of Professional-YAM (Omen's Comminications program).
YAM works fine at 19200 bps provided there are no memory resident programs
that mess with interrupt latencey.

Compared to 9600 bps, 19k is noticeably crisper and file downloads (especially
when YMODEM protocol 1k packets are used) is much faster.
-- 
Chuck Forsberg WA7KGX	..!tektronix!reed!omen!caf
Omen Technology Inc 17505-V NW Sauvie IS RD Portland OR 97231
Voice: 503-621-3406	Modem: 503-621-3746