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From: igp@camcon.co.uk (Ian Phillipps)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Reading time and date without using bios or dos ?
Message-ID: <2409@titan.camcon.co.uk>
Date: 17 Feb 89 14:18:12 GMT
References: <4368@okstate.UUCP> <17841@gatech.edu> <891@mannix.iros1.UUCP>
Organization: Cambridge Consultants Ltd., Cambridge, UK
Lines: 15

mercier@iros6.iro.umontreal.ca (Denis Mercier) writes:

>I want to know, if it is possible, where and how i can read time and date
>set on a pc system, ...
>i can't use bios or dos since these routines are not reetrant and
>need this in hardware interrupt routine. It will help a lot, thanks.

The Bios just counts up a three or four bytes at 40h:mumble, at the rate
of 2^16 per hour - the addresses you'll find in the listing of the ROM in
your technical manual. [I don't have one at this site]
Your interrupt routine can read these.
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