16 Nov
2003
16 Nov
'03
8:51 a.m.
There are lot codes on the TTL, but I don't know
how to turn those
into dates. The numbers are like "6903", "6908", "6910",
so maybe I
am looking at chips manufactured during 1969, which would place the
boards manufactured around early 1970? I don't know what to make of
the TI chips with "6915" on them if that were the case.
As I understand it, date codes are year and week numbers, so 6915 would
mean a lot manufacturered during the 15th week of 1969. (Exactly how
weeks are numbered I don't know and may even vary from manufacturer to
manufacturer, but for most purposes a week one way or the other makes
little difference.)
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