First computer with real-time clock?

From: Andy Holt <andyh_at_andyh-rayleigh.freeserve.co.uk>
Date: Thu Jul 29 00:19:10 2004

> Does anyone know what was the first computer to have a built-in real-time
> clock?

Depends a bit on what you mean by "real time clock".
In earlier days the (salesman's) definition would include a line frequency
interrupt.

Under that definition most, if not all, 3rd-generation mainframes had one as
standard. For most pre-LSI minicomputers it was likely to be an option
rather than standard.

If you mean a clock that maintains time when power is off or gets the time
by radio then we are probably into the micro era.

Andy
Received on Thu Jul 29 2004 - 00:19:10 BST