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Article #1561

Buffer overruns, what happens?

#1561
From: John Sambrook
Date: Mon, 05 Jan 1987 18:37
33 lines
2067 bytes
Hi,

Well, we are still having problems with our Z-49 terminals.  As I
have stated previously we have been having problems when listing
long files on the terminal at moderate (9600) baud rates.  The behavior
is that the terminal will stop scrolling and will begin overprinting
the same line for anywhere from several seconds to a minute or more.
Sometimes the terminal will break out of this mode and begin scrolling
again; othertimes it won't.  This behavior has been demonstrated on
two different systems here at the University of Washington and has
also been confirmed by one other person to date.  Again, I would like
to hear from others with similar experiences.

My purpose in posting this today is to ask the following question of
the readers of this newsgroup:  

	Is it reasonable to assume that overrunning the input buffer
	of a terminal may have side effects other than the loss of
	some amount of transmitted data?

The reason I ask this is that I believe that our system might not
be reacting fast enough to the XOFF sent by the terminal.  I am 
wondering if by overrunning the terminal input buffer we might be
clobbering some other datum used by the terminal thereby causing it
to go into hyperspace.

Thanks,

John
-- 
John Sambrook                           Work: (206) 545-7433
University of Washington WD-12          Home: (206) 487-0180
Seattle, Washington  98195              UUCP: uw-beaver!uw-nsr!john
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From: john@uw-nsr.UUCP (John Sambrook)
Newsgroups: comp.terminals
Subject: Buffer overruns, what happens?
Message-ID: <925@uw-nsr.UUCP>
Date: Mon, 5-Jan-87 13:37:30 EST
Article-I.D.: uw-nsr.925
Posted: Mon Jan  5 13:37:30 1987
Date-Received: Tue, 6-Jan-87 18:58:10 EST
Reply-To: john@uw-nsr.UUCP (John Sambrook 5-7433)
Distribution: na
Organization: UW-Bioengineering, Seattle, WA
Lines: 32
Keywords: buffering, flow control, Z-49