delorie.com/archives/browse.cgi | search |
Xref: | news2.mv.net comp.os.msdos.djgpp:6741 |
From: | Charles Sandmann <sandmann AT clio DOT rice DOT edu> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Hellpppp.....Keyboard Int. |
Date: | Fri, 02 Aug 1996 11:11:00 CDT |
Organization: | Rice University, Houston, Texas |
Lines: | 8 |
Message-ID: | <32022894.sandmann@clio.rice.edu> |
References: | <4ts8is$9h2 AT news DOT nevada DOT edu> |
Reply-To: | sandmann AT clio DOT rice DOT edu |
NNTP-Posting-Host: | clio.rice.edu |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
> When I set the Keyboard interrupt, there is no change in the 9th discripter. > Where does CWSDPMI store the vectors for Protected mode interrputs? Internally in it's own table. The interrupt routine must handle a change of stacks, just in case your current SS:ESP isn't valid/locked. The ring 0 version cheats and doesn't do this, just putting your IRQ routine directly in the IDT (why not, if you mess up in ring 0 you are toast anyway). Look at the CWSPDMI source for more information.
webmaster | delorie software privacy |
Copyright © 2019 by DJ Delorie | Updated Jul 2019 |