Differences between 8085 and 8086 Microprocessor

 Differences between 8085 and 8086 Microprocessor

8085
8086
8085 is 8-bit microprocessor
8086 is 16-bit microprocessor
8085 has 16-bit address bus
8086 has 20-bit address bus
Clock speed: 3 MHz
Clock speed can vary between 5, 8 and 10 MHz for three different MP.
8085 can access up to 2^16 = 64 KB of memory
8086 can access up to 2^20 = 1 MB of memory
8085 doesn't have an instruction queue
8086 has instruction queue
8085 does not support pipelined architecture
8086 supports pipelined architecture.
8085 does not support multiprocessing support
8086 supports
8085 can address 2^8 = 256 I/O's
8086 can access 2^16 = 65,536 I/O's
8085 only supports integer and decimal
8086 supports integer, decimal and ASCII arithmetic.
8085 does not support Multiplication and Division
8086 supports.
8085 supports only single operating mode
8086 operates in two modes.
8085 requires less external hardware
8086 requires more external hardware.
The cost of 8085 is low.
The cost of 8086 is high.
In 8085, memory space is not segmented.
In 8086, memory space is segmented.

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