When did Memory- and IO Protection Emerge (Esp. in Minis)?

Paul Koning paulkoning at comcast.net
Thu May 5 12:58:00 CDT 2016

> On May 5, 2016, at 1:34 PM, Chuck Guzis <cclist at sydex.com> wrote:
> On 05/04/2016 11:34 PM, William Donzelli wrote:
>> Wasn't minicomputer really a marketing term, anyway? Suits and all?
> Well, it was the sixties, after all.  We all forget "midicomputer". :)
> One thing that some may not know about the 1700 is that it had a
> *per-word* protection bit as well as I/O protection on a "per device"
> basis.   I don't know of any other computers with that feature.

Burroughs mainframes?  While the tag bits aren't quite semantically equivalent to protection, you get some of the same benefits.


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