Thanks to all for the answer to my question---correct on all counts. I
found one dual stamped [INTEL 8080A & 1820-1701]. "House numbered" parts
always seemed like odd thing to do--duplicated a lot of effort---did
they think they were hiding propriatiary information by obscuring the
actual #'s on chips, transistors, etc?
Thanks again,
Craig
Allison J Parent wrote:
<Newbie question----got a bunch of boards from HP terminals [2640 and
<2645A's]
The same thing with a HP "house number". The older cpus were often
ceramic/gold until later and better plastics or cheaper grey or brown
ceramic started to appear.
Allison