Mountain Computer Apple Clock board for the Apple II
Sun, 2010-02-07 16:35 — panjiabe
Donor: Janet Gibson
The Apple II had no built-in mechanism to retain system clock information while the system was off, so to maintain file timestamps, etc. users either needed to manually set the time on every boot or install a clock expansion board such as this one with a battery. Marked as copyrighted 1978, Mountain Computer, Inc.
References:
http://apple2history.org/history/ah13.html
http://en.wikipedia.org/wiki/Apple_II_system_clocks
