10 Sep
2015
10 Sep
'15
12:28 p.m.
On 2015-Sep-10, at 10:18 AM, Al Kossow wrote:
On 9/10/15 9:23 AM, Mike Stein wrote:
There are two chips there with dates codes 6816.
I suspect the date codes of the form e.g. 710, 728 would be 6710, 6728. At least in the
past when I've seen 3-digit dates codes they've tended to correlate with dropping
the decade-year digit.
Not very interesting
backside is all-telling.
DD12092 is the part number. DD == "Data Display"
the display division of CDC
they are the form factor that DD used. I picked up a 3291-B display
controller manual from Billy Pettit yesteray, and is uses discrete
cards in the same shape.
cans are Fairchild, circa 72/73