First computer with real-time clock?

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Thu Jul 29 18:50:48 2004

> The 1973 pdp-11 processor handbook indicates that
> the PDP-11/05 and PDP-11/10 had a line frequency
> clock and the PDP-11/35 and PDP-11/40 are
> pre-wired to accept a KW11-I. So they could
> track the passage of time, but not while the
> power was off.
>
> I doubt that any PDP-8 came with any such option

Line time interupts certainly existed for the PDP8/e, but that's about
the same vintage. There was also one for the P850, which is a couple of
years earlier (1970, I think).

-tony
Received on Thu Jul 29 2004 - 18:50:48 BST