...but it does get a small mention in the Z80 write-up:How is the 4004 not on there? It pretty much BEGAN CPU processing.
It still seems that they should have had that in there with its own write up....but it does get a small mention in the Z80 write-up:
"Federico Faggin knew well the kind of money and man-hours it took to market a microprocessor. While at Intel, he had contributed to the designs of two seminal specimens: the primordial 4004, and the 8080, of Altair fame. So when he founded Zilog with former Intel colleague Ralph Ungermann, they decided to start with something simpler: a single-chip microcontroller."
IEEE Spectrum: 25 Microchips That Shook the World (Page 4 link)
You're probably right Krum, so I'll add a couple of links to it:It still seems that they should have had that in there with its own write up.
Not quite true. Prior to the existance of the single chip processor we built CPUs from MSI chips like the 74181 ALU. We used a pair 7489 RAM chips for the registers and 7438 chips for the open collector bus drivers. Serial I/O was done with 74164, 74165, and 74166 shift registers. Those were the days when men were men, a 5V linear supply might be designed to supply in excess of 100 Amperes, and a carelessly placed screwdriver might get welded to the terminals of a big blue capacitor.How is the 4004 not on there? It pretty much BEGAN CPU processing.
Yes, that was my interpretation of his post. I agree that the 4004 was an important precursor of the 8008 and subsequent chips. Since the main application was the calculator and it was quickly surpassed by LSI chips that did the whole job I can understand why it may have received short shrift from Spectrum.Papabravo,
I, amongst others most-likely, would love to hear more about your experiences from the earlier days of processing and electronics in general.
However, I think Krumlink's post, regarding the 4004, was made in reference to single-chip processing, as an addition to the mentioned list of singular chips that have changed our world since their introduction.