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From: jrwsnsr@nmt.edu (Jonathan R. Watts)
Newsgroups: comp.lang.pascal
Subject: Re: About Emptying COM1 port
Message-ID: <1990Sep5.010347.26099@nmt.edu>
Date: 5 Sep 90 01:03:47 GMT
References: <34753@unix.cis.pitt.edu>
Organization: New Mexico Institute of Mining and Technology
Lines: 19

From article <34753@unix.cis.pitt.edu>, by cncst@unix.cis.pitt.edu (Christophe N. Christoff):
> [...]
> I used 
> 
> echo a | copy autoexec.bat com1
> 
> DOS simply ignore all this pipeline!!

The reason DOS ignores the pipeline is because it always clears the
keyboard buffer when it gives you that infamous error message...you can't
type ahead.  If you happen to use 4DOS, you could say

keystack 0 "a" ^ copy autoexec.bat com1

but that is rather kludgy, and does you no good if you don't use 4DOS.
 
  - Jonathan Watts
 
jrwsnsr@jupiter.nmt.edu (Internet address)