nov 1, 1971 - intel 4004 CPU

Description:

made for a Japanese calculator company
4 16 pin chips
256 by 8 bit read only memory (ROM)
a 320-bit random access memory (RAM)
a shift register for input/output
Faggin
advertised as the MCS-4 (Microcomputer system 4)
PMOS
"what allowed all the
functions of a general-purpose computer to be
integrated together was a monolithic central
processing unit (CPU) — a microprocessor —
and the first commercial microprocessor was
born nine years later in 1971"

"At that time,
many engineers knew how to create the
logic design of a small CPU. However, no
one had achieved the circuit density needed
for a cost-effective general-purpose CPU
that had sufficient speed to handle a wide
range of applications. At Intel, I used the
perfected SGT process for random-logic
design with the ‘buried contact’ and the
silicon-gate bootstrap load that had been
developed at Fairchild, which provided the
high speed and circuit density required
for a single-chip CPU for the first time. "
https://www.nature.com/articles/s41928-017-0014-8.pdf

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