AT Harddrive controller specs, and others

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#601

From: Kevin Meyer
Date: Tue, 07 Apr 1992 21:38

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Me again..
 
When programming the AT-286 hard-drive controller card, is it possible
to determine which controller invoked the hardware interrupt, or does
the the secondary controller invoke IRQ 15?
 
Again, I have limited information at my disposal here, and would
appreciate any info regarding the AT hard-drive controller hardware.
Actually, I have quite a lot of info, but there are still some holes.
 
While I am at it, can anyone briefly describe the changes done in DOS 5
etc to allow for a greater-than-30meg partition on HD's if the BPB
"number of sectors" variable is still only a word? What are the physical
limits imposed by these other OS's?
 
Any new functions added to DOS 5+ device driver specs?
 
Cheerio, oiche-var.. etc
Kevin
kmeyer@daisy.ee.und.ac.za
---
Anyone want a rogue IBM PC/AT assembly language programmer?

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Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!psgrain!ee.und.ac.za!tplinfm
From: kmeyer@daisy.ee.und.ac.za (Kevin Meyer)
Subject: AT Harddrive controller specs, and others
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Message-ID: <1992Apr7.213855.12738@grunt.ee.und.ac.za>
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Date: Tue, 7 Apr 1992 21:38:54 GMT
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