8-bit

From Free net encyclopedia

For the era of computer gaming commonly referred to as "8-bit", see History of video games (8-bit era)

Template:N-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.

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.

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

About 55% of all CPUs sold in the world are 8-bit microcontrollers or microprocessors.

List of 8-bit CPUs

CPU can be classified on the bases of the Data it can access in a single operation.A 8-bit processor can access 8 bit of data in single operation .A 16-bit processor can access16 bit of data in single operation .

8-bit Intel CPUs

• Intel 8008
• Intel 8080
• Intel 8085
• Intel 8088 ^*NOTE: Intel 8088 is 8-bit externally only
• Intel 80188 ^*NOTE: Intel 8088 is 8-bit externally only

List of competitor compatible CPUs to Intel 8-bit architecture

• Zilog Z80
• Zilog Z800
• Zilog Z8000

8-bit Motorola CPUs

see main article: 68h

• Motorola 6800

List of competitor compatible CPUs to Motorola 8-bit architecture

• MOS Technology 6501
• MOS Technology 6502

de:8-Bit-Architektur es:8 bits it:8 bit ko:8비트 컴퓨터 pl:Architektura 8-bitowa zh:8位元