An Intel input/output coprocessor for the 8086/8088 central processors
Pinout of Intel 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.[1] 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 in July 1979 for US$194.20 in quantities of 100 or more.[2] Intel second sourced this coprocessor to Fujitsu Limited.[3]
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.[4] It was also used in the Altos 586 multi-user computer.[5] Intel themselves used the 8089 in their reference designs (which they also commercialized) as System 86.[6]
^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.
The Intel8089 input/output coprocessor was available for use with the 8086/8088 central processor. It was announced in May 1979, but the price was not...
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1979. p. 71. Retrieved November 21, 2011. Intel Corporation, "Microcomputer Components: Intel Introduces the 8089 IOP, an I/O processor for the advanced...
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para 42 C-475/99 Ambulanz Gloeckner v Landkreis Suedwestpfalz [2001] ECR I-8089, para 52–65 Ambulanz Gloeckner, para 61 see, C-311/85 Vereniging van Vlaamse...
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