Article View: comp.os.msdos.programmer
Article #3587Re: 80368/80486 exceptions & interrupts: INT 10h
From: Harald Ljoen FBA
Date: Wed, 11 Nov 1992 12:42
Date: Wed, 11 Nov 1992 12:42
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In article <26759.9211101622@thor.cf.ac.uk>, spxtrb@thor.cf.ac.uk (Tim Barnett - programmer) writes: >Trivial question ... >I have Microsoft's 80386/80486 Programming Guide which says on page 119 ... >(my parentheses) > > Interrupt number Class Description > -------------------------------------------------- > 16 (decimal,=10h) Fault Coprocessor error > >... but under MS-DOS I know that INT 10h traps to the EGA/VGA BIOS. Eg: When IBM designed the IBM PC *both* the hardware guys *and* the software guys failed to RTFM, which clearly states that interrupt vectors 00 - 1F are _RESERVED_ by Intel. So the INT 10 handler has to check if it was invoked by a Coprocessor fault. Likewise for most other BIOS calls and IRQ handlers. Neat! -- ** Also sprach harald.ljoeen@nta.no **
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Newsgroups: comp.os.msdos.programmer Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!ugle.unit.no!nuug!nntp.nta.no!hal.nta.no!hlj From: hlj@hal.nta.no (Harald Ljoen FBA) Subject: Re: 80368/80486 exceptions & interrupts: INT 10h Message-ID: <1992Nov11.124211.25228@nntp.nta.no> Sender: news@nntp.nta.no Nntp-Posting-Host: rimne.nta.no Reply-To: harald.ljoeen@nta.no Organization: Norwegian Telecom Research References: <26759.9211101622@thor.cf.ac.uk> Date: Wed, 11 Nov 92 12:42:11 GMT Lines: 22