8-bit

8-bit CPUs normally use an 8-bit data bus and a 16-bit address bus which means that their address space is limited to 64 kilobytes; this is not a "natural law", however, and thus there are exceptions.

Related Topics:
16-bit - Address space - Kilobyte

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The first widely adopted 8-bit microprocessor was the Intel 8080, being used in many hobbyist computers of the late 1970s and early 1980s, often running the CP/M operating system. The Zilog Z80 (compatible with the 8080) and the Motorola 6800 were also used in similar computers. The Z80 and the MOS Technology 6502 8-bit CPUs were widely used in home computers and game consoles of the 70s and 80s. Many 8-bit CPUs or microcontrollers are the basis of today's ubiquitous embedded systems.

Related Topics:
Microprocessor - Intel 8080 - 1970s - 1980s - CP/M - Operating system - Zilog Z80 - Motorola 6800 - MOS Technology 6502 - Home computer - Game console - Microcontroller - Embedded systems

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There are 28 (256) possible permutations for 8 bits.

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About 55% of all CPUs sold in the world are 8-bit microcontrollers.http://en.wikipedia.org/wiki/Microprocessor

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