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From: d_muller@suisse.enet.dec.com (Dan Muller)
Newsgroups: comp.lang.c++
Subject: Re: Zortech C++ (ZDB) / Windows 3.0 DPMI
Message-ID: <14589@shlump.nac.dec.com>
Date: 14 Aug 90 18:37:15 GMT
References: <36630002@hpfinote.HP.COM>
Sender: newsdaemon@shlump.nac.dec.com
Reply-To: d_muller@suisse.enet.dec.com (Dan Muller)
Organization: Digital Equipment Corporation, Littleton, MA
Lines: 21

>    ... I'm
> pretty convinced that the DOS extender version of Zortech C++ works
> under Windows 3.0 enhanced mode. ...
> 
> However, it is not the case with ZDB, the Zortech C++ debugger.
> Trying to start ZDBV86 under Windows 3.0 will get a message say,
> "Alreadu in virtual 86 mode.". ...
> 

My guess, based on similar situations I've read about involving other products,
is that the debugger needs to take control of the extended DOS environment,
rather than just work within it.  The DOS extenders I've read about don't allow
this, or allow it only through a special interface for the debugger (which is
probably different for every DOS extender).  There's probably nothing you can
do
about this incompatibility.

| Dan Muller                    | d_muller@took.enet.dec.com
| Digital Equipment Corporation | 508 486-7614
| 550 King St., LKG2-2/BB9      | "So THAT's what an invisible barrier
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