Newsgroups: comp.sys.atari.st.tech
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!laird
From: laird@think.com (Laird Popkin)
Subject: high speed serial problem
Message-ID: <1991Apr22.223633.17497@Think.COM>
Sender: news@Think.COM
Organization: Thinking Machines Corporation, Cambridge MA, USA
Date: Mon, 22 Apr 91 22:36:33 GMT

I have an old 520ST (with only an external floppy drive!) with 1 Mb RAM,
and I am having trouble with the serial port.  I am trying to use it with a
Telebit Trailblazer modem, and it works fine with a low speeds (e.g. 2400
bps) but it tends to lock up at PEP speeds (19.2K bps).  I tried installing
a program in my AUTO folder which was supposed to fix the problem, but all
that did was to cause the modem to _always_ lock up.  I've used the modem
with other ST's (a STacy and a Mega) and it seemed to work fine, so I
believe that the problem must be in my ST.  Can anyone suggest anything to
check?  Is there a likely connection to check, or chip to replace?

Thanks.

- Laird Popkin (laird@think.com)