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- Path: sparky!uunet!auspex-gw!guy
- From: guy@Auspex.COM (Guy Harris)
- Newsgroups: comp.arch
- Subject: Re: IBM AS/400 is the world's slowest computer
- Message-ID: <16030@auspex-gw.auspex.com>
- Date: 22 Dec 92 04:15:40 GMT
- References: <1992Dec18.165950.15013@webo.dg.com> <1992Dec20.235519.16823@news.uiowa.edu>
- Sender: news@auspex-gw.auspex.com
- Organization: Auspex Systems, Santa Clara
- Lines: 17
- Nntp-Posting-Host: auspex.auspex.com
-
- >3) The AS400 is a capability based tagged architecture. It offers security
- > like nothing else on the market. That's not to say that it's perfect,
- > but while all us RISCy folks have been off worrying about MIPS, IBM has
- > noticed that tools providing incredibly tight control over access to
- > information are crucial in many markets. Try writing an AS400 virus!
-
- Just out of curiosity, how much of the capability stuff is implemented
- in what I, at least, would consider the *real* instruction set - i.e.,
- the so-called "vertical microcode" instruction set - and how much is
- implemented in the "high-level" instruction set?
-
- I.e., precisely how CISCy is the "vertical microcode" instruction set? I
- don't particularly care how CISCy the "high-level" instruction set is -
- Smalltalk bytecodes are probably somewhat "high-level", as may be the
- internal bytecodes used by various language interpreters, but both can
- be handled, these days, by non-"high level CISC" processors (both RISC
- and CISC).
-