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From: Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: DPMI multitasking for V2
Date: Tue, 31 Oct 1995 08:06:44 CST
Organization: Rice University, Houston, Texas
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References: <DHAzv9 DOT 7yJ AT jade DOT mv DOT net>
Reply-To: sandmann AT clio DOT rice DOT edu
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To: djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway: from newsgroup comp.os.msdos.djgpp

> Has any one written a pre-emptive mutitasking library/environment for 
> djgpp-v2.  I seem to remember reading that someone was working on one 
> but I can't find the message in the mail archives.

It's been discussed, but noone is working on it.  Preliminary support need
to implement it is there (in setitimer()) but there are lots of details 
to work out.

> I would also like to find more information on the DPMI stacks as the 
> DPMI spec is rather obscure.

What do you need to know?  Whenever you are in a HW interrupt, a RMCB,
or exception, your SS will be something you've never seen before, so
GCC can't handle this (assembler only).