First computer with real-time clock?

[Tom Jennings]

On Mon, 2004-08-02 at 13:05, Vintage Computer Festival wrote:

> > (Wouldn't a hardware manual and/or programers manual help here?)
> 
> Indeed.  I've read through the Manual of Operation for the 650 and it
> makes no mention or reference anywhere about any sort of timer feature at
> all.

But in the spirit of the times, does any hardware facility have any
time-related side effect that could have been exploited to extract time
from? (Besides the obvious calibrated-subroutine hack.) Or does the
feature have to be explicitly a "time-keeping" hardware facility?