17 Mar
1998
17 Mar
'98
3:20 p.m.
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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