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