Differences between 8085 and 8086 microprocessor

Microcontroller Microprocessor 8085 8086

In this section, we will see some basic differences between Intel 8085 MPU, and Intel 8086 MPU.

The 8085 is an 8-bit microprocessor. It was produced by Intel and first introduced in 1976. The 8086 is enhanced version of 8085 microprocessor. It is 16-bit processor. Now let us see some basic differences between these two.

Property	8085 Microprocessor	8086 Microprocessor
Data Bus Size	8-Bit	16-Bit
Address Bus Size	16-bit	20-bit
Clock Speed	3MHz	Varies in range 5.8 – 10 MHz
Duty Cycle for clock	50%	33%
Flags	It has 5 flags (Sign, Zero, Auxiliary Carry, Parity, Carry)	It has 9 flags (Overflow, Direction, Interrupt. Trap, Sign, Zero, Auxiliary Carry, Parity, Carry)
Pipelining Support	Does not support	Supports
Memory Segmentation supports	Does not support	Supports
Number of transistors	Nearly 6500	Nearly 29000
Processor type	Accumulator based	General Purpose register based
Presence of Minimum and Maximum mode	Not present	Present
Number of processors	Only one processor is used	More than one processor is used. Additional processor (external) can also be employed
Memory Size	64KB	1MB
Instruction	No multiplication and division instruction	Multiplication and Division operations are present
Instruction Queue Support	Does not support	Supports

Arjun Thakur

Published on 11-Mar-2019 08:31:52

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