[GTALUG] mysterious restarts

[Scott Allen]

(Since this discussion has long ago gone off topic, I may as well continue.)

On 16 June 2016 at 11:00, Lennart Sorensen via talk <talk at gtalug.org> wrote:
> Who built a computer that cared about AC frequency to drive the real
> time clock?  Never heard of anyone doing that.

My first computer, a Poly-88 8080 based system, did (I still have it).
<http://www.polymorphic-computers.com/poly88.html>

The transformer used for the linear power supply was tapped, rectified
and clamped to feed to an interrupt pin. The interrupt routine would
increment a counter in RAM which was accessible for real time
calculations.

-- 
Scott