The Intel 80186 microprocessor and microcontroller presented 1982. They are based on the Intel 8086, and how the 16-bit external data bus multiplexed with 20-bit address bus. It is also available as an Intel 80 188, with 8-bit external data bus.
The 80 186 and 80 188 series are generally intended for embedded systems, microcontrollers with external memory. Therefore, reducing the number of chips, these are features such as clock generator, controller interrupts, timers, wait state generator, and external DMA channel chip select line.
The original clock rate of 80 186 and 80 188 is 6 MHz, but due to hardware microcode update is available for use, especially for the billing address many individual instructions run faster than 8086 on the same clock frequency. For example, right now a controller resolution mode is much faster than in 8086, especially when memory space was the one operands and destination. Time and shares showed a great improvement, there are several times as fast as the original 8086 multi-bit shift was made almost four times faster than in the 8086th processor.
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