Discussion
The width of the instruction queue/pipeline in 8086 microprocessor is :
Answer: B
The 8086 instruction queue is 6 bytes long.
The bus interface unit of the 8086 prefetches instruction bytes into a 6-byte first-in, first-out queue while the execution unit is busy decoding and executing earlier instructions. This overlap of fetch and execute is a simple form of pipelining and speeds up execution.
The 8088, which has an 8-bit external data bus, has a 4-byte queue, which is the usual source of the 4-byte distractor. 8 bytes and 2 bytes are not the queue length of either processor.
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