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- From: Mark.R.Valence@dartmouth.edu (Mark R. Valence)
- Newsgroups: comp.sys.mac.programmer
- Subject: Re: Hardware Protection Keys
- Message-ID: <C1F3Ax.GGo@dartvax.dartmouth.edu>
- Date: 25 Jan 93 16:04:09 GMT
- References: <23JAN199318502476@violet.ccit.arizona.edu>
- <1993Jan24.215738.9412@kth.se>
- Sender: news@dartvax.dartmouth.edu (The News Manager)
- Organization: Dartmouth College, Hanover, NH
- Lines: 30
- X-Posted-From: InterNews1.0a5@newshost.dartmouth.edu
-
- In article <1993Jan24.215738.9412@kth.se>
- d88-jwa@cyklop.nada.kth.se (Jon Wtte) writes:
-
- > In <23JAN199318502476@violet.ccit.arizona.edu> theeric@violet.ccit.arizona.edu (Eric Hegstrom - THEERIC) writes:
- >
- > >I don't know about ADB devices but the company I used to program
- > >for used read/writable protection keys for the SCSI port (transparent
- > >to any devices I tried to hook up).
- >
- > 1) I'm all out of SCSI devices
- > 2) I wouldn't trust anything that isn't a real SCSI unit
- > on any of my SCSI buses. All my important data goes there,
- > and some of that data needs to go there FAST.
-
- I once played with a SCSI dongle that did not require a SCSI device ID.
- "How did it work" you ask? Well, it simply watched for a special
- sequence of bits on the SCSI bus, like 2A83F93AA9C0823BC09234C or
- something. When it saw this sequence, it woke up and interpreted the
- following bits as commands, then sent the results back to the Mac.
- Heavan help you if you had a document that contained
- 2A83F93AA9C0823BC09234C in it. Saving would prove disasterous
- (although I don't think you would realize until too late ?? ).
-
- I think the manuafacturers said something like "oh, but the chances of
- that happening are very minimal." Pah! If there is a chance at all,
- why do it?
-
- Or maybe I just didn't understand something.
-
- Mark.
-