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- Newsgroups: comp.unix.xenix.sco
- Path: sparky!uunet!kithrup!sef
- From: sef@kithrup.COM (Sean Eric Fagan)
- Subject: Re: Xenix considered harmful (was Re: SCO support - a success story)
- Organization: Kithrup Enterprises, Ltd.
- Date: Mon, 07 Sep 1992 08:47:27 GMT
- Message-ID: <1992Sep07.084727.1644@kithrup.COM>
- References: <9209061050.AA05570@dynamix.com>
- Lines: 36
-
- In article <9209061050.AA05570@dynamix.com> david@dynamix.com (David L Jarvis) writes:
- >How about all those segmentation violations that arose from the 286 not
- >having hardware memory protection? The 286 was a bastardized 186, and both
- >were brain-dead. My opinions are based on the hardware, not the OS.
- >But again, this is a digression.
-
- Excuse me?
-
- 1. You're not really likely to get "segmentation violation" (or "memory
- fault") unless the processor has *some* sort of hardware memory protection,
- which the '286 does. (The '286 has segment-level protection: read and
- write/execute bits on each segment, and a whole nest of other things I don't
- really want to get into without having my Intel manuals handy).
-
- 2. If anything, the '186 was a bastardised '286: they both had the same
- base instruction set and features, except that the '286 added a "protected
- mode," four more bits of addressing (software and hardware), and, of course,
- instructions to deal with all of that.
-
- For what it was intended, and the time and market, the '286 was mostly
- adequate. It does not use a C/UNIX memory model, however, being closer to
- something Pascal would have an eaiser time dealing with, but people have
- coped. Intel did screw up in some areas on it, but not really the ones most
- people claim.
-
- But, then, most people don't seem to think about Intel when they flame it;
- they just seem to assume that, since everyone else *says* it, Intel *must*
- be horrible, evil, and drain-bamaged.
-
- Kinda like the U.S. political system, actually.
-
- --
- Sean Eric Fagan | "You can't get lost in one room, no matter how
- sef@kithrup.COM | little effort you make to learn your way around."
- -----------------+ -- William E Davidsen (william@crd.GE.COM)
- Any opinions expressed are my own, and generally unpopular with others.
-