delorie.com/archives/browse.cgi | search |
X-Authentication-Warning: | delorie.com: mail set sender to djgpp-bounces using -f |
X-Recipient: | djgpp AT delorie DOT com |
From: | "Gerrit van Niekerk" <gerritvn AT gpvno DOT co DOT za> |
Organization: | GPvNO |
To: | djgpp AT delorie DOT com |
Date: | Fri, 02 Nov 2007 11:35:43 +0200 |
MIME-Version: | 1.0 |
Subject: | Re: PM interrupt handling - how to call old old ISR with slower rate than my new ISR |
Message-ID: | <472B0B8F.22018.5B2373CE@gerritvn.gpvno.co.za> |
In-reply-to: | <200711020046.lA20kxob017037@envy.delorie.com> |
References: | <1193963270 DOT 088377 DOT 101010 AT 22g2000hsm DOT googlegroups DOT com>, <200711020046 DOT lA20kxob017037 AT envy DOT delorie DOT com> |
X-mailer: | Pegasus Mail for Windows (4.41) |
Reply-To: | djgpp AT delorie DOT com |
Errors-To: | nobody AT delorie DOT com |
X-Mailing-List: | djgpp AT delorie DOT com |
X-Unsubscribes-To: | listserv AT delorie DOT com |
On 1 Nov 2007 at 20:46, DJ Delorie wrote: > > You need to use the non-chained hook, and call the old one via one of > the other DPMI functions... "call real mode procedure with IRET frame" > Just be warned: If you have a real-mode TSR that also hooked the timer interrupt and that enables interrupts or calls DOS even with all the pre-cautions to ensure DOS re-enterabilty, the system will silently crash if you do the above! I have not found a way around this apart from avoiding it.
webmaster | delorie software privacy |
Copyright © 2019 by DJ Delorie | Updated Jul 2019 |