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Path: utzoo!linus!philabs!cmcl2!seismo!brl-tgr!tgr!@purdue.ARPA
From: @purdue.ARPA:mjs@purdue-ecn-ee.ARPA (mjs)
Newsgroups: net.micro.cpm
Subject: Help needed with 8251 USART
Message-ID: <1098@brl-tgr.ARPA>
Date: Sun, 29-Dec-85 22:40:11 EST
Article-I.D.: brl-tgr.1098
Posted: Sun Dec 29 22:40:11 1985
Date-Received: Tue, 31-Dec-85 00:36:31 EST
Sender: news@brl-tgr.ARPA
Lines: 13

Does anyone out there have any experiece programming the 8251 USART?  I
am using a Royal Alphatronic PC with CP/M 2.2, and want to be able to
set and change the baud rate.  I have the data sheets for the 8251, and 
through much experimentation, I am able to change the baudrate to suit
my needs.  Unfortunatly, as soon as I try to send data out the port,
the chip locks up.  Data coming in works fine.  Anyone know anything
about this?  I can send you the code that I am using if you think
that you can help me out...

                               Thanks...
                                Mike Spitzer
                                mjs@purdue-ecn
                                [decvax,ucbvax,ihnp4,inuxc]!pur-ee!mjs