On 2015-Sep-10, at 10:18 AM, Al Kossow wrote: > On 9/10/15 9:23 AM, Mike Stein wrote: >> 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
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.
