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 An Intel A80286-8 processor with a gray ceramic heat spreader | |
| General information | |
|---|---|
| Launched | February 1982 |
| Discontinued | 1991[1] |
| Common manufacturer | |
| Performance | |
| Max. CPU clock rate | 4 MHz to 25 MHz |
| FSB speeds | 4 MHz to 25 MHz |
| Data width | 16 bits |
| Address width | 24 bits |
| Architecture and classification | |
| Technology node | 1.5 μm[2] |
| Instruction set | x86-16 (with MMU) |
| Physical specifications | |
| Transistors | |
| Co-processor | Intel 80287 |
| Packages | |
| Sockets |
|
| History | |
| Predecessors | 8086, 8088 (while 80186 was contemporary) |
| Successor | Intel 80386 |
| Support status | |
| Unsupported | |
The Intel 80286[4] (also marketed as the iAPX 286[5] and often called Intel 286) is a 16-bit microprocessor that was introduced on February 1, 1982. It was the first 8086-based CPU with separate, non-multiplexed address and data buses and also the first with memory management and wide protection abilities. It had a data size of 16 bits, and had an address width of 24 bits, which could address up to 16M of memory with a suitable operating system such as Windows compared to 1M for the 8086. The 80286 used approximately 134,000 transistors in its original nMOS (HMOS) incarnation and, just like the contemporary 80186,[6] it can correctly execute most software written for the earlier Intel 8086 and 8088 processors.[7]
The 80286 was employed for the IBM PC/AT, introduced in 1984, and then widely used in most PC/AT compatible computers until the early 1990s. In 1987, Intel shipped its five-millionth 80286 microprocessor.[8]
- ^ "CPU History - The CPU Museum - Life Cycle of the CPU". cpushack.com. Archived from the original on July 20, 2021. Retrieved September 6, 2021.
- ^ "1.5 μm lithography process - WikiChip". en.wikichip.org. Archived from the original on September 9, 2018. Retrieved January 21, 2019.
- ^ Ormsby, John, "Chip Design: A Race Worth Winning", Intel Corporation, Microcomputer Solutions, July/August 1988, page 18
- ^ "Microprocessor Hall of Fame". Intel. Archived from the original on July 6, 2007. Retrieved August 11, 2007.
- ^ iAPX 286 Programmer's Reference (PDF). Intel. 1983. page 1-1. Archived (PDF) from the original on August 28, 2017. Retrieved August 28, 2017.
- ^ A simpler cousin in the 8086-line with integrated peripherals, intended for embedded systems.
- ^ "Intel Museum – Microprocessor Hall of Fame". Intel.com. May 14, 2009. Archived from the original on March 12, 2009. Retrieved June 20, 2009.
- ^ Teixeira, Kevin, "What's Next For The 80286?", Intel Corporation, Microcomputer Solutions, November/December 1987, page 16
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