Once upon a time Dave Ihnat wrote:
>
> Deryk Barker wrote:
>
> > (MIT wrote the OS itself)
>
> Urh--I thought it was a co-operative effort between GE and MIT? It was grounded
> in a _lot_ of custom hardware to support the OS features; that was GE's job,
> nie?
Yes, GE provided the GE-645 a modified version of their commercial
GE-635. The modifications essentially involved adding a virtual memory
unit for paging *and* segmentation (and not, not the pathetic Intel
version).
AFAIK though, the software was written almost exclusively by MIT and
Bell Labs. Later on the Cambridge Information System's Laboratory
(CISL - pronounced Siss'l) was set up. I don't know if this predated
the GE selloff to Honeywell or not. Certainly in later days the
development and maintenance was done at CISL and the Sicilians (as it
was pronounced) were Honeywell employees.
After the Mitre study on computer security for the USAF (early 70s)
various recommendations were made for the next generation of Multics
hardware: putting the rings into hardware and reducing their number
from 64 to 8, for instance.
All of these suggestions were incorporated into the 6180, the Multics
version of the Honeywell (formerly GE) 6000 line of processors.
--
|Deryk Barker, Computer Science Dept. | Music does not have to be understood|
|Camosun College, Victoria, BC, Canada| It has to be listened to. |
|email: [EMAIL PROTECTED] | |
|phone: +1 250 370 4452 | Hermann Scherchen. |
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