12 Nov
2007
12 Nov
'07
10:06 p.m.
From: Chris Kennedy <chris at mainecoon.com>
Sean Conner wrote:
I can think of several thousand that have been
made over the past decade,
all made with the Intel x86 architecture. It even has the segments that
Multics used. Seems like a perfect match to me.
Hence my question regarding the number of rings used by Multics. Just
because there's multiple contexts doesn't mean that there's _enough_ of
them. From multicians.org:
Although there were 64 rings
(an illusion created by software) on
GE 645 Multics, there are 8 rings, supported in hardware, on the
Honeywell 6180 in its various models.
BLS
12 Nov
12 Nov
10:17 p.m.
Brian L. Stuart wrote:
As opposed to what? Four on the X86?
The original question remains, how many rings does Multics need? Just
because eight were provided by hardware doesn't mean they were all used.
An emulator rather than port seems like a far better approach all the
time. Sure, you wouldn't be able to hang 16 tape drives and 256 disks
off of it, but then why would you want to?
--
Chris Kennedy
chris at mainecoon.com AF6AP
http://www.mainecoon.com PGP KeyID 108DAB97
PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97
"Mr. McKittrick, after careful consideration..."
From
multicians.org:
Although there were 64 rings (an illusion created by software) on
GE 645 Multics, there are 8 rings, supported in hardware, on the
Honeywell 6180 in its various models.
6261
days inactive
6261
days old
1 comments
2 participants
participants (2)
-
blstuart＠bellsouth.net -
chris＠mainecoon.com