From: "Peter Remmers" <Peter DOT Remmers AT t-online DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: strange interrupt chaining problem with keyboard interrupt
Date: Sun, 8 Oct 2000 09:59:39 +0200
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com


"Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il> schrieb...

> I can only say that I cannot reproduce the problem on my machine.
[...]
> That was on a P166 with MS-DOS 5.0, QEMM 8 as the memory manager and
> CWSDPMI r4 as the DPMI host.

I use Win98SE's DOS.
Do you have keyb.com loaded?
I assume you don't, because if I remove it from my autoexec.bat
everything works! Even in a DOS box under windows.

> You didn't say what command line you used to compile; my compilation
> command was this:
>
>     gcc -Wall -g -o kbtest kbtest.c

That's okay. From RHIDE or with a simple compile command, doesn't matter.

> This is redundant.  __djgpp_set_ctrl_c(0) (called internally by
> setmode) does this already.  What I meant was actually to avoid
> hooking the keyboard interrupt by the startup code, not to affect what
> that interrupt handler does once it is called.

I commented out the following line in
dpmiexcp.c, __djgpp_exception_toggle():

__dpmi_set_protected_mode_interrupt_vector(9, &kbd_ori);

As far as I can see this is the only place where a keyboard handler
gets set. But it didn't help.....

Peter