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From: ts@cup.portal.com (Tim W Smith)
Newsgroups: comp.sys.ibm.pc.programmer
Subject: How do file servers work?
Message-ID: <30686@cup.portal.com>
Date: 11 Jun 90 07:37:50 GMT
Organization: The Portal System (TM)
Lines: 17

How do file servers under DOS work?  That is, you've got these DOS
programs that are issuing INT 21h requests for file access, and
somehow these get translated into requests for files on a server.

Do the people that implement file servers just intercept all INT 21h
requests and process those that refer to the server, or is there a
better way?

How about things that are not file servers but have non-DOS file
systems, such as ISO 9660 CD-ROMs?

In general, what's the best way to make a non-DOS storage device
work under DOS, assuming that the file system format for the device
has already been defined and it is not a DOS file system, so you
can't just implement a block device driver for it?

						Tim Smith