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- Newsgroups: comp.sys.apple2
- Path: sparky!uunet!math.fu-berlin.de!informatik.tu-muenchen.de!hphalle6!behrenss
- From: behrenss@Informatik.TU-Muenchen.DE (Soenke Behrens)
- Subject: Re: Ramfast and Tape Backup units..
- References: <m0mOQFo-0000R6C@crash.cts.com> <behrenss.715307581@hphalle6> <1992Sep1.065420.5127@cco.caltech.edu> <behrenss.715394757@hphalle6> <1992Sep2.051729.22054@cco.caltech.edu>
- Sender: news@Informatik.TU-Muenchen.DE (USENET Newssystem)
- Organization: Technische Universitaet Muenchen, Germany
- Date: Fri, 4 Sep 1992 05:54:12 GMT
- Message-ID: <behrenss.715586052@hphalle6>
- Lines: 35
-
- toddpw@cco.caltech.edu (Todd P. Whitesel) writes:
-
- >>Aha. A bit strange ... this entity called "OS" is usually supposed to handle
- >>all peripherals. Oh well, never mind.
- >No! You just revealed the problem. OS's cannot handle periphals they don't
- >know how to use already. You teach an OS how to use a peripheral by installing
- >a driver for that peripheral -- that's all a driver is! The tricky part here
- >is that GS/OS supports two types of peripherals: block devices (which are
- >random access) and character devices (which aren't). The RF only provides a
- >block device driver, and to use the tape properly you need a character device
- >driver like Apple's SCSITAPE.
-
- I know all that. What _I_ was trying to get across is: It is CV Tech's
- "duty" to supply decent drivers. Why didn't they do it the way Apple did?
- This concept of a supervisory driver with associated device drivers is
- really very powerful and flexible ... I like it.
- It is _not_ (as you suggested) up to the programmer to build handling of
- certain devices hard-coded into his/her/its programs. This is the purpose
- of the OS, which of course includes any installed drivers.
-
- >Anybody who was planning to write their own backup program should already have
- >an understanding of the driver/device concepts, or they're gonna have to learn
- >before they can get anywhere...
-
- Well, I think I have some knowledge, enough to write/port backup utilities.
- Seems we had some misunderstandings back there :)
- Ok, now let's lay this thread to rest, shall we?
-
- Yours
- Soenke
- --
- ===========================================================================
- More than silver, more than gold, I need ! behrenss@informatik.
- electricity. I need it for my dreams. ! tu-muenchen.de
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