No, I'm afraid not. I can tell you from both personal experience and from the designer (Terry Walker) that the chip is either a Mostek MK4008P-9 or an AMI S4008-9. I have used both chips. See my web page:
http://wsudbrink.dyndns.org:8080/cyclops/index.html Among other important features of those chips is the fact that the memory cells are laid out in a 32 by 32 square and that the cells are multi-transistor per cell. The multi-transistor design allows for non-destructive reads which is crucial for the design. Bill Sudbrink -----Original Message----- From: cctalk [mailto:[email protected]] On Behalf Of Eric Smith via cctalk Sent: Tuesday, June 09, 2020 7:40 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Ever seen a Cromemco Cyclops in the wild? On Tue, Jun 9, 2020 at 4:53 PM Boris Gimbarzevsky via cctalk < [email protected]> wrote: > so probably read the Cyclops article, decided that $25 was way > too much for one chip and never bothered. In 1975 the B2102 or C2102 in the lidded ceramic package was more expensive than the D2102 (CERDIP, frit seal, no die cavity lid), and far more expensive than the P2102 (plastic). The B2102 or C2102 in low volume sold for over $10 at the time, so $25 for one that had been manually de-lidded then fit with a transparent lid doesn't seem like it was too unreasonable. If you wanted to save a few bucks you could have bought a normal C2102 and replaced the lid yourself. Of course, the article didn't say that it was a 2102, but that was evident from the pinout. The A/B/J/K jumpering was needed because the topology of the 2102 and 2102A were different, which didn't matter in normal RAM applications. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
