Subject: Re: djgpp 1.06, demacs, Desqview
To: Ted Cox <jtcox AT gumby DOT syr DOT edu>
Date: Wed, 22 Apr 92 17:23:20 METDST
From: Luca Collofra <collofra AT di DOT unipi DOT it>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Status: O


> 
> Has anyone got djgpp 1.06 working well within Desqview?  One djgpp
> compiled program, or gcc itself, works fine.  But two programs (either
> two gcc compiled programs or one gcc compiled program and gcc itself)
> cause my machine to reboot.  I don't know if this the flaky way my
> machine (a DELL 310) and QEMM-Desqview get along, or a more
> fundamental problem.  It would be especially nice to run demacs and
> djgpp simultaneously under Desqview.
> 
> Ted Cox
> 

The answer is that two (or plus) DJGPP related (distribuited or compiled) 
executables CANNOT run concurrently on the same CPU BY DEFINITION.
Infact any DJGPP related executable requires the CPU not to be in the
protected mode just to put it in such a mode.
The same problem arises when you try to run 2 programs that use the pretected
mode both! The reboot is dued (maybe) to a bug or to an incorrect "illegal
instruction" recovery procedure.

.---------------------------------------. .-----------------------------------.
| Vincenzo (Enzo) Romano                | | Maybe computers will never become |
| collofra AT di DOT unipi DOT it                  | | as intelligent as Men, but surely |
| Dept. of Computer Science, Pisa ITALY | | they'll never become so stupid.   |
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