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Article #47Re: Questions!
From: Mike Meyer, I'll be mellow when ...
Date: Wed, 04 Jun 1986 05:28
Date: Wed, 04 Jun 1986 05:28
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1349 bytes
My cp/m-80 system (RIP) did track buffering. They solved the problem of disk changes by caching door open interrupts from the 8" drives. Amigados does the same kind of trick on 3" drives, so I would assume that both 5" and 3" drives (of the correct make) supplied that interrupt, or something similar (door closed?). After the disk changed, the cp/m-80 system would beep at you and say "Put that disk back! Buffers not flushed!" After you put the disk in, it would say "That better be the same disk!" (gee, it must have had both open and close interrupts.) It wasn't kidding; flushing the directory cache on the wrong disk produced to pretty much garbaged both disks. <mike
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.BERKELEY.EDU Path: arc1-ca.pugleaf.net!utzoo!decvax!bellcore!ulysses!ucbvax!OPAL.BERKELEY.EDU!mwm From: mwm@OPAL.BERKELEY.EDU (Mike Meyer, I'll be mellow when I'm dead) Newsgroups: mod.computers.68k Subject: Re: Questions! Message-ID: <8606040528.AA07275@ucbopal.Berkeley.Edu> Date: Wed, 4-Jun-86 01:28:28 EDT Article-I.D.: ucbopal.8606040528.AA07275 Posted: Wed Jun 4 01:28:28 1986 Date-Received: Wed, 4-Jun-86 20:15:18 EDT Sender: mwm@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 14 Approved: info-68k@ucbvax.berkeley.edu