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

[Erik Baigar]

On Tue, 3 May 2016, Paul Koning wrote:

> further, at least as far as the THE operating system in 1964, on the 
> EL-X8.  That OS is particularly interesting because it has virtual 
> memory and demand paging without any hardware help, without address 
> mapping or protection.

Wow - and this machine still used a drum for secondary
storage; quite outstanding, you are right!

    Erik.