[TUHS] Any oldtimers remember anything about the KS11 on the 11/20?

[Ron Natalie]

We always referred to CSS as the DEC kludge department. 

Sent from my iPhone

> On Jun 22, 2019, at 22:37, Rudi Blom <rudi.j.blom at gmail.com> wrote:
> 
> Probably already known, but to be sure
> 
> Interesting options: MX11 - Memory Extension Option: this enabled the
> usage of 128 KW memory (18-bit addressing range); KS11: this option
> provided hardware memory protection, which the plain /20 lacked. Both
> options were developed by the Digital CSS (Computer Special Systems).
> http://hampage.hu/pdp-11/1120.html
> 
> PS the page listed below has a very nice picture of the 'two fathers
> of UNIX" working on a PDP-11/20
> http://hampage.hu/unix/unix1.html