The Intel 8289 is a Bus arbiter designed for

Intel 8086 The 8086 (also called iAPX 86) is a 16-bit computing, 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-b ...

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

/ 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 Multiprocessing (MP) 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. The ...

operation or for working with

coprocessor A coprocessor is a computer processor used to supplement the functions of the primary processor (the CPU). Operations performed by the coprocessor may be floating-point arithmetic, graphics, signal processing, string processing, cryptography or ...

s. Necessary control signals are generated by the 8289. This version was available for US$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

Bus-Arbiter
* Jim Nadir
''Designing 8086, 8088, 8089 Multiprocessing System With The 8289 Bus Arbiter''
, Application Note (AP-51), März 1979, Intel Corporation. Intel chipsets Input/output integrated circuits {{comp-hardware-stub