Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.unix.i386
Subject: Re: ISC 2.0.2, How to set baud rate on serial ports?
Message-ID: <1990Aug29.113110.704@virtech.uucp>
Date: 29 Aug 90 11:31:10 GMT
References: <9008280005.aa24338@PARIS.ICS.UCI.EDU>
Reply-To: cpcahil@virtech.UUCP (Conor P. Cahill)
Organization: Virtual Technologies Inc., Sterling VA
Lines: 34

In article <9008280005.aa24338@PARIS.ICS.UCI.EDU> baxter@zola.ICS.UCI.EDU (Ira Baxter) writes:
>
>an ancient Z80 CP(shudder)M system at 9600 baud.  I assume that UNIX
>on my 20Mhz 386 can catch any stream of characters I pitch at it
>without losing anything [if it can't, I'll just lower the baud rate

This isn't necessarily true (especially when the machine has other work 
to do).

>Trying "stty 9600 < /dev/tty02 & stty -a /dev/tty02" also tells

The correct way to do this is as follows:


	(stty 9600; stty -a) < /dev/tty02

Or, for your data capture:

	(stty 9600; cat > capture_file) < /dev/tty02

>Par for the course is that "stty 9600 < /dev/tty02 & cat /dev/tty02"
>seems to pick up garbage when the Z80 transmits at 9600;

Describe garbage.  I mean, do some of the characters get garbled, or do
you get additional junk data or do you loose some data?

This may be a simptom of flow control not being correctly set between
the system and your Z80 (on either side).  


-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170