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From: locke@pdn.UUCP (Richard Locke)
Newsgroups: comp.sys.ibm.pc
Subject: Re: IBM PC AT Hardware Debugger
Message-ID: <1171@pdn.UUCP>
Date: Thu, 27-Aug-87 12:47:54 EDT
Article-I.D.: pdn.1171
Posted: Thu Aug 27 12:47:54 1987
Date-Received: Sat, 29-Aug-87 12:44:14 EDT
References: <201@genat.UUCP>
Organization: Paradyne Corporation, Largo, Florida
Lines: 32
Keywords: PC Debugger
Summary: Atron makes one

In article <201@genat.UUCP>, garym@genat.UUCP (Gary Mittleman) writes:
> I have developed a complex PC based voice response system that runs multiple
> tasks under DOS using a home grown context switching system. With additional
> code, our product sometimes hangs the PC. I am looking for a product that 
> allows me to look at memory dumps even though the PC is hung. I once heard of a 
> product called PERISCOPE that hooked up to the XT chip.
> 
> Does anyone know of a product I can use for an AT, either hardware or software?
> Gary S. Mittleman
> Votek Systems Limited  (416)889-7977

A couple of years ago I worked on a complex voice processing system which 
ran multiple tasks under Intel's iRMX (tm) operating system.  My code
frequently hung too! 

We had a copy of PERISCOPE (tm?).  I personally have never used it.  This was
not a hardware debugger.  The people I worked with told me that they
had used it previously and found it unsuitable for our particular
application.  It may be suitable for yours.

After weeks of fruitless debugging, I contacted one of our suppliers 
for advice.  They recommended the Atron hardware debugger.  You 
plug their board into the bus, and their processor into
the slot.  This product allows you to look at memory (even when hung),
disassemble code, set breakpoints, and lots of other neat stuff.  Atron
does make a product for the AT, but it ain't cheap.

Incidentally, the day after the Atron stuff came, I had figured out
what the problem.  Some sort of hardware debugger is a must.

Disclaimer:  My opinions are mine, I have no affiliation with the
aforementioned products/companies!