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Compare 8085, 8086 and 8088 microprocessors

written 8.3 years ago by teamques10 ★ 68k

•   modified 8.3 years ago

Mumbai University > Electronics and Telecommunication > Sem 4 > Microprocessor and peripherals

Marks: 5M

Year: Dec 2015

microprocessors and microcontrollers

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written 8.3 years ago by teamques10 ★ 68k

8085	8086	8088
8085 is an 8 bit microprocessor.	8086 is a 16 bit microprocessor.	8088 is a 16 bit microprocessor.
It has 8 bit data bus.	It has 16 bit data bus.	It has 8 bit data bus.
It has 8 bit ALU.	It has 16 bit ALU.	It has 16 bit ALU.
8085 does not require memory banking as it has an 8 bit data bus.	8086 requires memory banking to transfer 16 bit data at a time.	8088 does not require memory banking as it has an 8 bit data bus.
8085 performs slower memory operations as it can transfer only 8 bits in one cycle.	8086 performs faster memory operations as it can transfer 16 bits in one cycle.	8088 performs slower memory operations as it can transfer only 8 bits in one cycle.
8085 does not support pipeline architecture.	8086 supports pipeline architecture.	8088 supports pipeline architecture.
8085 has no pre-fetch queue as it does not support pipelining.	8086 has a 6 byte pre-fetch queue for pipelining.	8088 has a 4 byte pre-fetch queue for pipelining.
8085 has an IO/ pin to differentiate between memory and I/O operations.	8086 has an M/ pin to differentiate between memory and I/O operations.	8088 has an IO/ pin to differentiate between memory and I/O operations.
8085 has no pre-fetchqueue.	8086 BIU will fetch new bytes into the pipelining queue when 2 bytes of the queue are empty.	8088 BIU will fetch a new byte into the pipelining queue when 1 byte of the queue is empty.
8085 has 5 flags.	8086 has 9 flags.	8088 has 9 flags.

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