History of OSs?

From: Bill/Carolyn Pechter <pechter_at_shell.monmouth.com>
Date: Tue Mar 17 15:20:42 1998

> VMS was not the first virtual memory OS that DEC wrote.
> TOPS-20, for the PDP-20 (that was a PDP-10 with virtual memory)
> was the first virtual system. TOPS-20 was not the same as
> TOPS-10, even the system calls were invoked a different way.
> (My first real systems programming job was on a 20/40, a joy to
> work on, tho slow by modern standards).
> Jack Peacock
>
>

However, TOPS-20 is based on Tenex which had virtual memory in it before
DEC got a hold of it.

VAX/VMS, I figure, was the first "DEC from the ground up" Virtual Memory
System...

Am I incorrect folks? Please correct this old Vax Tech.

(No slight meant to TOPS-20 and TOPS-10. I remember my SIMTEL-20 ftp's and DEC
MARKET-20 days fondly)

Bill

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Received on Tue Mar 17 1998 - 15:20:42 GMT