On 2 Feb 2012 at 22:44, Brent Hilpert wrote:
Is there a date code? (I'm guessing mid-late-70s).
Haven't found any
mention in the 1981 IC Master, which is generally pretty good for
these sort of things.
M7731, so I'm guessing 1977, which would be in line with the date on
the MCU (7740).
--Chuck