The Intel 8289 is a
Bus arbiter designed for
Intel 8086
The 8086 (also called iAPX 86) is a 16-bit microprocessor chip designed by Intel between early 1976 and June 8, 1978, when it was released. The Intel 8088, released July 1, 1979, is a slightly modified chip with an external 8-bit data bus (allow ...
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8087/
8088
The Intel 8088 ("''eighty-eighty-eight''", also called iAPX 88) microprocessor is a variant of the Intel 8086. Introduced on June 1, 1979, the 8088 has an eight-bit external data bus instead of the 16-bit bus of the 8086. The 16-bit registers and ...
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8089
The Intel 8089 input/output coprocessor was available for use with the 8086/8088 central processor. It was announced in May 1979, but the price was not available at that time. It used the same programming technique as 8087 for input/output operat ...
. The chip is supplied in 20-pin
DIP package. The 8086 (and 8088) operate in maximum mode, so they are configured primarily for
multiprocessor
Multiprocessing is the use of two or more central processing units (CPUs) within a single computer system. The term also refers to the ability of a system to support more than one processor or the ability to allocate tasks between them. There ar ...
operation or for working with
coprocessors. Necessary control signals are generated by the 8289. This version was available for USD $44.80 in quantities of 100.
[Intel Corporation, "The 8086 Family: Concepts and realities", Intel Preview Special Issue: 16-Bit Solutions, May/June 1980, Page 19]
References
External links
* Jim Nadir
''Designing 8086, 8088, 8089 Multiprocessing System With The 8289 Bus Arbiter'' Application Note (AP-51), März 1979, Intel Corporation.
Bus-Arbiter
Intel chipsets
Input/output integrated circuits
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