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]
Peripherals[edit]
- Intel 8282/8283: 8-bit latch
- Intel 8284: clock generator
- Intel 8286/8287: bidirectional 8-bit driver. Both Intel I8286/I8287 (industrial grade) version were available for US$16.25 in quantities of 100.[7]
- Intel 8288: bus controller
- Intel 8289: bus arbiter
Literature and datasheets[edit]
- 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[edit]
- ^ 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.
- ^ Intel Corporation, "8089 Price Announcement", Intel Preview, July/August 1979, p. 25.
- ^ Intel Corporation, "NewsBits: Second Source News", Solutions, January/February 1985, P. 1
- ^ "Hardware manual" (PDF). Intel. Retrieved 30 April 2023.
- ^ Review: Altos 586. InfoWorld. 7 November 1983. pp. 89–90. ISSN 0199-6649.
- ^ "Introduction to the System 86/360 and System 86/330A Microcomputer Systems" (PDF). bitsavers. Intel. 1983. Retrieved November 30, 2022.
- ^ 8086 Available for industrial environment, Intel Preview Special Issue: 16-Bit Solutions, Intel Corporation, May/June 1980, p. 29.
| Authority control databases: National |
|---|
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction