Intel 8086

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The 8086[1] (also called iAPX86) is a 16-bit microprocessor chip designed by Intel, which gave rise to the x86 architecture; development work on the 8086 design started in early 1976 and the chip was introduced to the market in mid-1978. The Intel 8088, released in 1979, was a slightly modified chip with an external 8-bit data bus (allowing the use of cheaper and fewer supporting logic chips[2]), and is notable as the processor used in the original IBM PC.

Contents

History

Background

In 1972, Intel launched the 8008, the first 8-bit microprocessor.[3] It implemented an instruction set designed by Datapoint corporation with programmable CRT terminals in mind, that also proved to be fairly general purpose. The device needed several additional ICs to produce a functional computer, in part due to its small 18-pin "memory-package", which ruled out the use of a separate address bus (Intel was primarily a DRAM manufacturer at the time).

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