Charles,

I have spent over 22 years with Compuware Corporation ... many of those years 
working on Xpediter/CICS. I have never worked for "CA".  

Compuware Corporation is NOT abbreviated "CA" - Computer Associates used to be 
abbreviated "CA"  (their name was recently changed to be CA, Inc).

CA has never owned/developed any of the Xpediter product line.  I must take 
exception with your posting that inferred Xpediter is - or ever was - a CA 
product.

Mark Weiss
Xpediter/CICS Development Team
Compuware Corporation 


-----Original Message-----
Date:    Sat, 30 Dec 2006 10:22:02 -0800
From:    Charles Mills <[EMAIL PROTECTED]>
Subject: Re: How to write a full-screen Rexx debugger?

I have not used XDC or CA-Xpediter, but I would imagine you could write a
debugger in "mostly" Rexx with some assembler. Take a look at the TSO/E
Programming Services manual for a discussion of how to write a native TSO
full screen program.

You will also have to give some thought to the "debugging services" you wish
to provide: how you will implement breakpoints, stepping through
instructions, and so forth. Also to the various storage and register
displays, etc.

If I were considering doing this as a commercial product, I would consider
- the market for developer tools is always a difficult one
- the market for z/OS developer tools is small and shrinking
- CA-Xpediter kind of owns the big-deal corporate market space. CA is a
tough incumbent to displace.
- XDC is pretty established in the "word-of-mouth" market
- There are other competitors as well. ASG has a debugger that competes with
CA-Xpediter that they got from the Viasoft acquisition.

Good luck!

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