Date: Tue, 25 Apr 1995 18:11:34 +0300
From: eliz AT is DOT elta DOT co DOT il (Eli Zaretskii)
To: bdavidson AT ra DOT isisnet DOT com
Subject: Re: Chaining real-mode interrupts
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

> > In non-DPMI mode, if you only hook the PM interrupt, you will lose interrupts
> > when your machine is in real mode.
>
> What would the symptoms of that be?  I haven't noticed any dropped 
> keystrokes or anything.

The symptoms would be that you will sometimes lose keystrokes and timer
ticks.  You don't see this right now probably due to the fact that your
program doesn't do much except hooking interrupts.  Try to run some file
operations in the foreground (i.e. in the main() function) while the
interrupts are hooked and you should see this.

> The only comment I have is that your description of 
> _go32_dpmi_chain_protedted_mode_interrupt() is a little vague.  

I will try to make it more clear, but please also consider what, if
anything, needs amendment after you've solved your problems.  If you
cannot do it right by reading the FAQ and the docs, something *must* be
missing.