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Notable 8-bit CPUs

The first commercial 8-bit processor was the Intel 8008 (1972) which was originally intended for the Datapoint 2200 intelligent terminal. Most competitors to Intel started off with such character oriented 8-bit microprocessors. Modernized variants of these 8-bit machines are still one of the most common types of processor in embedded systems.

Another notable 8-bit CPU is the MOS Technology 6502; it, and variants of it, were used in a number of personal computers such as the Apple I and Apple II, the Atari 8-bit family, the BBC Micro, and the Commodore PET and Commodore VIC-20, and in a number of video game consoles such as the Atari 2600 and the Nintendo Entertainment System.

Early or popular 8-bit processors (incomplete)
Manufacturer Processor Year Comment
Intel 8008 1972 Datapoint 2200 compatible
Signetics 2650 1973
Intel 8080 1974 8008 source compatible
Motorola 6800 1974
Fairchild F8 1975
MOS 6502 1975 Similar to 6800, but incompatible
Microchip PIC 1975 Harvard architecture microcontroller
RCA 1802 1976
Zilog Z80 1976 8080 binary compatible
Intel 8085 1977 8080 binary compatible
Motorola 6809 1978 6800 source compatible
Zilog Z8 1978 Harvard architecture microcontroller
Intel 8051 1980 Harvard architecture microcontroller
MOS 6510 1982 Enhanced 6502 custom-made for use in the Commodore 64
Ricoh 2A03 1982 6502 clone minus BCD instructions for the Nintendo Entertainment System
Zilog Z180 1985 Z80 binary compatible
Motorola 68HC11 1985
Atmel AVR 1996
Zilog EZ80 1999 Z80 binary compatible
Infineon XC800 2005
Freescale 68HC08
Hudson HuC6280
Motorola 6803
NEC 78K0[1]
  1. ^ NEC 78K0

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