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Encyclopedia > 80186

The 80186 is a microprocessor that was developed by Intel circa 1982. The 80186 was an improvement on the Intel 8086 and Intel 8088. As with the 8086, it had a 16-bit external bus and was also available as the Intel 80188, with an 8-bit external data bus. The initial clock rate of the 80186 and 80188 was 6 MHz. They were generally used as embedded processors. They were not used in many personal computers, but there were some notable exceptions. One was the Mindset, a very advanced computer for the time. Another was the original Gateway Handbook, a small subnotebook computer. A third was Compis, a Swedish school computer. And yet a fourth was the Tandy 2000 desktop, a somewhat PC-compatible workstation featuring particularly sharp graphics for its day.

One major function of the 80186/80188 series was to reduce the number of chips required by including features such as a DMA controller, interrupt controller, timers, and chip select logic.

New instructions were introduced as follows:

 ENTER Make stack frame for procedure parameters LEAVE High-level procedure exit PUSHA Push all general registers POPA Pop all general registers BOUND Check array index against bounds IMUL Signed (integer) multiply INS Input from port to string OUTS Output string to port 

External links

Intel 80186/80188 images and descriptions at cpu-collection.de (http://www.cpu-collection.de/?tn=1&l0=cl&l1=80186/188)


This article was originally based on material from the Free On_line Dictionary of Computing, which is licensed under the GFDL.

List of Intel microprocessors

4004 | 4040 | 8008 | 8080 | 8085 | 8086 | 8088 | iAPX 432 | 80186 | 80188 | 80286 | 80386 | 80486 | i860 | i960 | Pentium | Pentium Pro | Pentium II | Celeron | Pentium III | Pentium 4 | Pentium M | Itanium | Itanium 2 (note: italics indicates non-main branch µPs)

  Results from FactBites:
CPU-World: Intel 80186 microprocessor family (157 words)
Intel 80186 microprocessor, sometimes called i186, is an enhanced version of Intel 8086 16-bit processor.
With the exception of integrated components, the Intel 80186 microprocessor is not very different from the 8086, and, because of this, the 80186 may be considered as an embedded version of 8086.
Although the Intel 80186 was not widely used in the computers as the 8086 and 80286 did, it was successful in embedded processor market.
  More results at FactBites »



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