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 The Intel 8087, announced in 1980, was the first x87 floating-point coprocessor for the 8086 line of microprocessors. The purpose of the 8087 was to speed up computations for floating-point arithmetic, such as addition, subtraction, multi ...

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. Intel second sourced this coprocessor to

Fujitsu Limited is a Japanese multinational information and communications technology equipment and services corporation, established in 1935 and headquartered in Tokyo. Fujitsu is the world's sixth-largest IT services provider by annual revenue, and the la ...

. 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 The Apricot PC (originally called the ''ACT Apricot'') is a personal computer produced by Apricot Computers, then still known as Applied Computer Techniques or ACT. Released in late 1983, it was ACT's first independently developed microcomputer, ...

and the Intel

Multibus Multibus is a computer bus standard used in industrial systems. It was developed by Intel Corporation and was adopted as the IEEE 796 bus. The Multibus specification was important because it was a robust, well-thought out industry standard with ...

iSBC-215

Hard disk drive A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magne ...

controller. It was also used in the

Altos 586 The Altos 586 was a multi-user microcomputer intended for the business market. It was introduced by Altos Computer Systems in 1983. A configuration with 512 kB of RAM, an Intel 8086 processor, Microsoft Xenix, and 10 MB hard drive cost about U ...

multi-user computer. Intel themselves used the 8089 in their reference designs (which they also commercialized) as

System 86 A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expresse ...

Peripherals

Intel 8282 The Intel 8282 is an 8-bit latch, which was developed primarily for the Intel-8086/8087/ 8088/ 8089-processors. The component comes in 20-pin DIL package. It was licensed to companies such as NEC and Siemens. With the ROM-less versions of the MCS- ...

/ 8283: 8-bit latch *

Intel 8284 The Intel 8284 is a clock oscillator chip developed primarily for supplying clock signals for the Intel-8086/8087/8088/ 8089 series of processors. The commercial variant of the chip comes in 18-pin DIL and 20-pin PLCC packages, and originally w ...

: clock generator *

Intel 8286 Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...

/ 8287: bidirectional 8-bit driver. Both Intel I8286/I8287 (industrial grade) version were available for US$16.25 in quantities of 100.8086 Available for industrial environment, Intel Preview Special Issue: 16-Bit Solutions, Intel Corporation, May/June 1980, page 29. *

Intel 8288 The Intel 8288 is a bus controller designed for Intel 8086/8087/8088/ 8089. The chip is supplied in 20-pin DIP package. The 8086 (and 8088) operate in maximum mode, so they are configured primarily for multiprocessor operation or for working wit ...

: bus controller *

Intel 8289 The Intel 8289 is a Bus arbiter designed for Intel 8086/8087/ 8088/ 8089. The chip is supplied in 20-pin DIP package. The 8086 (and 8088) operate in maximum mode, so they are configured primarily for multiprocessor operation or for working with co ...

: bus arbiter

Literature and datasheets

8089 Assembler Users Guide
Intel 1979
8089 8 & 16-Bit HMOS I/O Processor
Intel 1980 * John Atwood, Dave Ferguson
''Debugging Strategies And Considerations For 8089 Systems''
Application Note (AP-50), September 1979, Intel Corporation. * Jim Nadir
''Designing 8086, 8088, 8089 Multiprocessing System With The 8289 Bus Arbiter''
Application Note (AP-51), März 1979, Intel Corporation. * Robin Jigour: ''Prototyping with the 8089 I/O Processor'', Application Note (AP-89), Mai 1980, Order number AFN 01153A, Intel Corporation. * ''Hard Disk Controller Design Using the 8089'', Application Note (AP-122), Order number 210202-001, Intel Corporation. * ''Graphic CRT Design Using the Intel 8089'', Application Note (AP-123), Intel Corporation.

References

{{Authority control 80089 Input/output integrated circuits