8086 microprocessor is the enhanced version of Intel 8085 microprocessor and was designed by Intel in 1976. The 8086 microprocessor is a 16-bit, N-channel, HMOS microprocessor, where the HMOS stands for High-speed Metal Oxide Semiconductor. Intel 8086 is built on a single semiconductor chip and packaged in a 40-pin IC package. It has 20 address lines and 16 data lines that provides up to 1MB storage. It consists of powerful instruction set, which provides operations like multiplication and division easily. It supports two modes of operation, Maximum mode and Minimum mode. Maximum mode is suitable for systems having multiple processors and minimum mode is suitable for systems having a single processor. The Clock speed of this microprocessor varies between 5, 8 and 10 MHz for different versions. The 8086 has multiplexed address and data bus which reduces the number of pins needed, but does slow down the transfer of data. The features of 8086 microprocessor include the possibility to perform bit, byte, word and block operations in 8086. It performs the arithmetic and logical operations on bit, byte, word and decimal numbers. It also supports multiprogramming.

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