Information About8-bit |
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Eight-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 Kibibyte s. This is not a "natural law", however, so 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 Computer s and Game Console s of the 70s and 80s. Many 8-bit CPUs or Microcontroller s are the basis of today's ubiquitous Embedded Systems . There are 28 (256) possible Permutation s for 8 bits.(in binary) About 55% of all CPUs sold in the world are 8-bit microcontrollers or Microprocessor s. WHY 8 BITS? 4-bit microprocessors were developed in the early 1970s starting with the Intel 4004 . Intel swiftly followed with 8-bit processors, and most competitors to Intel started with 8-bits. This, combined with the performance and memory limitations of the available 4-bit processors, meant that they fell out of commercial application quickly. LIST OF 8-BIT CPUS A CPU can be classified on the basis of the Data it can access in a single Operation . An 8-bit Processor can access 8 bits of data in a single operation, as opposed to a 16-bit Processor , which can access 16 bits of data in a single operation. 8-bit Intel CPUs
List of competitor compatible CPUs to Intel 8-bit architecture 8-bit Motorola CPUs : ''see main article: 68h ''
List of competitor CPUs similar to Motorola 8-bit architecture |
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