19-10-2017, 12:26 PM
The 8086 microprocessor is an upgraded version of the 8085 microprocessor that was designed by Intel in 1976. It is a 16-bit microprocessor that has 20 address lines and 16 data lines that provide up to 1 MB of storage. It consists of a powerful set of instructions, which provides operations such as multiplication and division easily. It supports two modes of operation, ie maximum mode and minimum mode. Maximum mode is suitable for systems with multiple processors and the minimum mode is suitable for systems having a single processor.
Features of 8086
The most outstanding features of an 8086 microprocessor are as follows:
• It has an instruction queue, which is capable of storing six bytes of instruction from memory, resulting in faster processing.
• It was the first 16-bit processor with 16-bit ALU, 16-bit registers, internal data bus and 16-bit external data bus resulting in faster processing.
• Available in 3 versions based on operating frequency -
o 8086 → 5MHz
o 8086-2 → 8MHz
o © 8086-1 → 10 MHz
• It uses two stages of pipelining, that is, Fetch Stage and Execute Stage, which improves performance.
• Fetch stage can preset up to 6 bytes of instructions and stores them in the queue.
• Execute step executes these instructions.
• Has 256 vectored interrupts.
• Consists of 29,000 transistors.