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- Path: sparky!uunet!mcsun!news.funet.fi!news.cs.tut.fi!tut!ttn
- From: ttn@cs.tut.fi (Tero Nieminen)
- Newsgroups: comp.sys.next.hardware
- Subject: Re: New RISC workstations / 88110 demise
- Date: 7 Nov 92 12:15:43
- Organization: Tampere Univ. of Technology, Finland.
- Lines: 22
- Distribution: world
- Message-ID: <TTN.92Nov7121543@kivikkorastas.cs.tut.fi>
- References: <1992Nov2.170741.2092@jhunix.hcf.jhu.edu> <Bx5Iwn.to.2@cs.cmu.edu>
- <1992Nov5.070604.2071@cubetech.com> <BxBCpM.65B.2@cs.cmu.edu>
- <ceynlZy00WAy810IZ5@andrew.cmu.edu>
- NNTP-Posting-Host: kivikkorastas.cs.tut.fi
- In-reply-to: cs4w+@andrew.cmu.edu's message of 6 Nov 92 17:47:49 GMT
-
- In article <ceynlZy00WAy810IZ5@andrew.cmu.edu> cs4w+@andrew.cmu.edu (Charles William Swiger) writes:
-
- "Unix emulation task"? What are you referring to? The Mach kernel does
- handle system traps (the functions described in "man 2 intro") for
- processes, exactly like any other kernel, and I don't see this changing
- under Mach 3.x.
-
- Mach 3 is a true micro kernel, unlike the Mach 2 that is a traditional
- monolithic kernel.
-
- Mach provides these functions because a standard unix
- kernel provides these functions; programs written for another unix
- machine work on the NeXT without modification because the Mach kernel
- provides the exactly same functionality. This compatibility is one of
- the most important features of Mach.
-
- Mach kernel is not actually designed to implement any particular OS. It
- just happens that most often a BSD emulator in run on top of it. And it
- is that emulator that provides the Unix features.
- --
- Tero Nieminen DANGER!
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