30 Jul
2004
30 Jul
'04
1:26 a.m.
>>>> "Tony" == Tony Duell
<ard(a)p850ug1.demon.co.uk> writes:
> 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
Tony> Line time interupts certainly existed for the PDP8/e, but
Tony> that's about the same vintage. There was also one for the P850,
Tony> which is a couple of years earlier (1970, I think).
While it is possible to build batch computers that have no sense of
time, it would be really hard to imagine a timesharing system without
that, for how else would you do timeslice scheduling?
Timesharing has been implemented on the PDP-1. And isn't the original
Dartmouth timesharing system even older?
paul