I came across some old and famous chips in one of my parts cabinets. Does anybody else keep old chips? and why?
Note that these were pretty expensive when they were purchased, especially the gold plated ceramic chips.
I expect most of these are part numbers that everyone has heard of.
Have you designed with any of these famous chips?
Brownie points if you can figure out the date codes.
What chips are buried in your archives?
Wow TTL, not even "LS" series....
On the right is the original ROM for the Sinclair MicroAce kit from 1981
This is the Nat Semi version of the 1771 on a board. That date code would be week 45 of 1979 (I was doing this in the early 1980s). There's a hugh cavity there, so maybe that's two chips side by side. It would explain why the Western Digital part has windows top and bottom if their part had two die back to back.
The 1771 had an internal data separator that didn't work very well, so this was the mod to get it going.
I had that working with a 6502 as the processor, a single-sided 8" disc drive, and fig-FORTH.
