MUD1 [and page/segment mapping]

[Glen Herrmannsfeldt]

Rich Alderson wrote:
(snip)

We would dearly have loved to have RA82s or RA90s on HSC70s attached to our
2065s and SC-30M at LOTS. Student disk space requirements were growing madly
in the late 1980s and early 1990s, even in the text-only world.

And I suppose no NFS either?

Is there an NFS client for any 36 bit system?

-- glen

[Mark Crispin]

Post by Glen Herrmannsfeldt
And I suppose no NFS either?

TOPS-20 had CFS which, unlike NFS, fully implemented local filesystem
semantics. You could have a page mapped shared read/write and an update
to that page on one CPU would immediately update on all others with full
synchronization. Everything that was atomic on a local filesystem was
atomic on CFS.

Post by Glen Herrmannsfeldt
Is there an NFS client for any 36 bit system?

Mark Lotter wrote an NFS server written for TOPS-20.

-- Mark --

http://panda.com/mrc
Democracy is two wolves and a sheep deciding what to eat for lunch.
Liberty is a well-armed sheep contesting the vote.

[Glen Herrmannsfeldt]

Mark Crispin wrote:
(snip)

Post by Mark Crispin

Post by Glen Herrmannsfeldt
Is there an NFS client for any 36 bit system?

Mark Lotter wrote an NFS server written for TOPS-20.

But no client? The interesting question is how to map
the 36 bit words to a byte oriented file on the server.

If files are read only from 36 bit systems, it doesn't
matter so much as long as all the bits get to the server
and back again. (Same as with writing 36 bit data to
9 track tape.)

-- glen