Primos, much like it's predecessor Multics implemented a ring protection model. Here's a fair explanation:

http://en.wikipedia.org/wiki/Ring_(computer_security)

Wjhonson wrote:
Why do you call it "ring" jump in particular?
What's the "ring" ?

-----Original Message-----
From: Wols Lists <antli...@youngman.org.uk>
To: u2-users <u2-users@listserver.u2ug.org>
Sent: Tue, Dec 4, 2012 4:07 pm
Subject: Re: [U2] Advantage of indirect call in BASIC


On 04/12/12 17:03, Wjhonson wrote:
Ring-jump ?
Vas is das

It's when the processor jumps between restricted user mode, and kernel
can do anything mode.

Cheers,
Wol
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Jeff Schasny - Denver, Co, USA
jschasny at gmail dot com
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