Mystery early, 1970 AMi chipset

[geraldius]

I hope someone can shed additional light on these.

I've had this set of chips since about 1980 and they were old even then. At the time they were all plugged into an anonymous pc board with nothing else on the board, just these interconnected and a few i/o connections to the board. Actually it was a pair of boards that were piggy-backed back-to-back. The boards are long gone.

Each IC bears a differnt part number. As best I can determine the chips all are date coded on mostly different dates during 1970 and 1 in 1971. There appears to be a lot of evolution in the packages during that short span of time, as many of the packages differ.

I will be getting better images soon.

[chip68]

These appear to be house-numbered, so you likely won't find much information on them.

I've seen AMI chips used in some strange places... The 40-pin gray trace CERDIPs in my avatar were from a commercial refrigeration unit circa 1973, part of the temperature control circuitry. Most of AMI's business in the late-'60s/early-'70s was custom ICs.

- CMW

[wepwawet]

I like the round cap on the wide package very much.

let me know if you sell or trade them:-)

[chip68]

[geraldius]

OK, I think I'm going to sell these. Do you think they are more desirable to collectors as the complete set, or should I break up the set and sell them individually?

[wepwawet]

Sell them all together, so the set will be complete.

As mentioned often, I don't like destroying the historical environment.
It is the same as we can see in archeology. The more knowledge we get the more we blame past scientists for destroying the chance to learn more by just picking the golden pieces and putting the rest to trash.

Maybe somewhen the chips find their way together in a machine.

Just as an example:
The grey 4004 I got last jear is still on its board behind glass and I never pulled it from the socket.
he only circumstance I can imagine to pull it will be that we go on with VICCA and I need to test the chip for functionality and a picture of the bottom.

So don't break the set up.
That's my opinion.