Article View: comp.sys.ibm.pc.misc
Article #6653Re: PC Interrupts, urgent request
From: Joe Dubner
Date: Sun, 06 Jan 1991 18:09
Date: Sun, 06 Jan 1991 18:09
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1079 bytes
> The initialization routine sets up the interrupt vector using (I am using > the MS Quick C compiler) dos_getvect() and dos_setvect(). I do the > dos_getvect() to save the original IRQ5 handler. I then read the OCW1 control I don't know a lot about the interrupt controller chip in the PC, and know even less about MS Quick C, but I'd be willing to bet good money that dos_getvect() works on software interrupts, not hardware IRQ lines. When you do a dos_getvect() on "5", you're saving the INT 05h vector, which is used to sense the PrtSc key. Lots of luck. ... Joe
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Path: arc1-ca.pugleaf.net!utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!clyde.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!tut.cis.ohio-state.edu!cs.utexas.edu!sdd.hp.com!hp-pcd!hpspkla!dubner From: dubner@hpspkla.spk.hp.com (Joe Dubner) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: PC Interrupts, urgent request Message-ID: <8750001@hpspkla.spk.hp.com> Date: 6 Jan 91 18:09:01 GMT References: <45739@cci632.UUCP> Organization: Hewlett Packard Company, Spokane, Wa. Lines: 14