🚀 go-pugleaf

In article <MEISSNER.90Feb28094823@curley.osf.org> meissner@osf.org (Michael Meissner) writes:

   Path: aber-cs!gdt!dcl-cs!ukc!mcsun!uunet!samsung!think!paperboy!meissner
   From: meissner@osf.org (Michael Meissner)
   Newsgroups: comp.arch
   Date: 28 Feb 90 14:48:23 GMT
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   In article <11254@encore.Encore.COM> peralta@pinocchio.Encore.COM
   (Rick Peralta) writes:
   | What about getting rid of conventional secondary storage?
   | Simply keep everything in virtual memory and have the OS
   | maintain whatever secondary store it sees fit?

   Hmm, you seem to have just proposed the System/3x (and AS/400 I think)
   from IBM, which uses a single level store.  Of course the only
   languages supported on it are business-type languages (RPG and Cobol).

The old single level storage dream! And capabilities as well...

I think that the best starting point for an investigation of this issue
is "Computer systems with a very large address space and garbage
collection", an MIT Dissertation and TechRep (#178) by Peter Bishop.

Legend has it that the S/38, from which the AS/400 evolved, was an
implementation of that thesis done by the people that had previously
done the S/3 accounting machine (what a joke! they made a few mistakes
:-), one of which particularly glaring and crucial in the design of the
reverse map MMU).

	Just to tell you how funny this is, the S/3 was a _card based_
	machine programmed in RPG, Bishop's architecture was a computer
	utility with a very lispish/capabilitish flavour. The S/38
	exhibits traits from *both* ancestors.
--
Piercarlo "Peter" Grandi           | ARPA: pcg%cs.aber.ac.uk@nsfnet-relay.ac.uk
Dept of CS, UCW Aberystwyth        | UUCP: ...!mcvax!ukc!aber-cs!pcg
Penglais, Aberystwyth SY23 3BZ, UK | INET: pcg@cs.aber.ac.uk