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From: edwardsa@frith.msu.edu
Newsgroups: comp.misc
Subject: Pointers to black art techniques.
Message-ID: <1991Mar29.064910.29144@msuinfo.cl.msu.edu>
Date: 29 Mar 91 06:49:10 GMT
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Organization: Michigan State University, College of Engineering
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Originator: edwardsa@frith.egr.msu.edu

I'm frustrated!  I've searched high and low for some sort of material that
talks about low-level control of hard disks, floppy disks, tape drives and 
the like, but I can't find anything.  Where do people learn about this?

Any pointers would be appreciated.

P.S.  By low-level control I mean the kind of software that controls a
      hard drive (say) though the CPU's I/O ports or through certain
      portions of memory, if memory-mapped I/O is used.