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- Path: sparky!uunet!munnari.oz.au!ariel.ucs.unimelb.EDU.AU!werple.apana.org.au!news
- From: markd@werple.apana.org.au (Mark Delany)
- Newsgroups: comp.sys.prime
- Subject: Re: X Windows on 50-Series
- Date: 26 Dec 1992 12:34:55 +1100
- Organization: werple public-access unix, Melbourne
- Lines: 42
- Message-ID: <1hgcrvINN4bs@werple.apana.org.au>
- References: <9212091722.AA28848@usenet.rpi.edu> <DRAND.92Dec10100134@spinner.osf.org> <1h1muqINN1e4@werple.apana.org.au> <1992Dec21.021714.26320@primerd.prime.com> <1h9e2jINNkht@werple.apana.org.au> <1992Dec23.214832.29949@primerd.prime.com>
- NNTP-Posting-Host: werple.apana.org.au
-
- jasonp@bungie.prime.com (Jason Pascucci) writes:
-
-
- >|> On a tangent, you may want to see the old discussions re 64-bit
- >|> addressing in comp.arch, one suggestion was that every data bit in the
- >|> universe would be potentially visible in one huge address space! The
- >|> mind boggles really.
-
- >Yup, but I believe it was decided you need a little more than 64 bits.
- >I think I posted my suggestion of 128 bit addressing, using a few
- >bits (16?) for tag. (First, you stick your IP address on the top...:)
-
- Exactly.
-
- >|> Something I've always wanted to know is why the port of Unix to
- >|> 50-series was canned (and I don't mean PRIMIX, I mean the genuine
- >|> article). Now what was that project called? Here are my three guesses:
- >|> performance, politics and (you guessed it) segmentation.
-
- >Given these three issues, why should Unix ever have made it
- >to the Intel architecture?
-
- Well, I won't speak to politics and performance, but the 386 provides
- flat addressing. The 286 did not which is while all unixes on it were
- fundamentally stuffed (that's techo talk for functionally limited :-)
-
-
- > I think the problems were a little
- >more deeply rooted technically, although I'm sure it was very
- >political. The DTAR setup and Ring protection scheme
- >seem to me the more likely to be the last nails in the coffin.
-
- Yes, good points. I don't recall DTARs well enough, but rings could be
- largely ignored, just as they are/were in Primos (now rings, there's
- an interesting side-track don't the annuls of history...)
-
-
-
- --
- Mark Delany markd@werple.apana.org.au
-
-
-