From: Tom Sgouros <tomss AT ids DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Failure during timing-sensitive application...
Date: Tue, 24 Sep 1996 19:57:40 -0400
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For those  who are interested, and to those who might be able to explain
this to me in such a way as to keep the problem from arising again...

The problem outlined below has become more difficult to reproduce since I
changed all the _bios_timeofday() calls with uclock() calls (with
appropriate source modifications). It's the nature of intermittent
problems that one can't be absolutely sure they've gone away, but I
haven't seen it since the change.

Can anyone tell me what's going on?


On Sun, 22 Sep 1996, Tom Sgouros wrote:

> Can anyone advise me on this?
> 
> I am working on an application that controls six or so RS232 devices. They
> are connected to the PC through a multiplexer, so there is only one COM
> port being accessed. Anyway, it is sitting on the other side of the room
> now, happily chunking away at round 7500 or so on my test program.
> 
> The problem is this: One time in three (give or take), the program hangs
> mysteriously in the first minute of execution. An unexplainable disk
> access (i.e. there is no program file access) coincides with the hang. If
> it doesn't hang within a minute, it seems to run indefinitely.
> 

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