Intel C8008

The Intel 8008 is the world's first 8 bit microprocessor introduced in April 1972. The 8008 was originally code named the 1201. The developers were Ted Hoff, Stan Mazor, Hal Feeney, and Federico Faggin.

Intel designed it for Computer Terminal Corporation (CTC) for use in it's Datapoint 2200 terminal, but because the 8008 was delivered too late and did not meet CTC's expectations, they didn't used it. Intel then brought the rights back and marketed the chip on it's own.

The Intel 8008 runs at 0.5 MHz, the 8008-1 at 0.8 MHz. It contains 3500 transistors realized in PMOS technology at 10-micron. For comparison, an Intel Pentium 4 consists of 178.000.000 transistors manufactured in 0.13-micron.

The chip has a 8 bit wide data bus and 14 bit wide address bus, which can address 16 KB of memory. Since Intel could only manufacture 18 pin DIP packages at 1972, the bus has to be three times multiplexed. Therefore the chip's performance is very limited and it requires a lot external logic to decode all signals.

Though often heard, it's not true that the Intel 8008 would be "twice a Intel 4004" that was introduced one year before. The 4004 has a harvard architecture and 16 registers while the 8008 has a von Neumann architecture and 7 registers.

The 8008 family is also referred to as the MCS-8.


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