Intel 8089: Difference between revisions - Wikipedia

The '''Intel 8089''' input/output coprocessor was available for use with the [[8086|8086/8088]] central processor. It was announced onin May 1979, but the price was not available at that time.<ref>Intel Corporation, "Microcomputer Components: Intel Introduces the 8089 IOP, an I/O processor for the advanced 8088/8086 CPU family, the first of a series of new subsystem components", Intel Preview, May/June 1979, p. 7.</ref> It used the same programming technique as [[8087]] for input/output operations, such as transfer of data from memory to a peripheral device, and so reducing the load on the CPU. This I/O processor was available onin July 1979 for US$194.20 in quantities of 100 or more.<ref>Intel Corporation, "8089 Price Announcement", Intel Preview, July/August 1979, page 25.</ref> Intel second sourced this coprocessor to [[Fujitsu|Fujitsu Limited]].<ref>Intel Corporation, "NewsBits: Second Source News", Solutions, January/February 1985, Page 1</ref>

Because IBM didn't use it in IBM PC design, it did not become well known; later I/O-coprocessors did not keep the x89 designation the way math coprocessors kept the x87 designation. It was used in the [[Apricot PC]] and the Intel [[Multibus]] iSBC-215 [[Hard disk drive]] controller.<ref>http://bitsavers.trailing-edge.com/pdf/intel/iSBC/144780-002_iSBC_215_Generic_Winchester_Disk_Controller_Hardware_Reference_Manual_Dec84.pdf {{Bare URL PDF|date=March 2022}}</ref> It was also used in the [[Altos 586]] multi-user computer.<ref>{{cite book |title=Review: Altos 586 |url=https://books.google.com/books?id=0C8EAAAAMBAJ&pg=PA89 |date=7 November 1983 |publisher=InfoWorld |pages=89–90 |issn=0199-6649}}</ref> Intel themselves used the 8089 in their reference designs (which they also commercialized) as [[System 86]].<ref>http://bitsavers.informatik.uni-stuttgart.de/pdf/intel/system3xx/172758-001_Introduction_to_the_System_86_330_and_380_Systems_Mar83.pdf {{Bare URL PDF|date=March 2022}}</ref>