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Comparison of 8-bit (8085),16-bit (8086) and 32-bit (80386) microprocessor

Microprocessor is the heart of the computer and the power of microprocessor is depends on the amount of data handled by it. Microprocessor is manufactured into the lightweight IC structure. So mostly when the study goes on about revolution of microprocessors or something about its family the question is always asked, "what is the difference between them" so we have sorted out some points about their differences as below:






Sr. No.
Parameters
8085
8086
80386
1.
Year of Introduction
1977
1978
1985
2.
Data Bus
8 bit
16 bit
32 bit
3.
Address Bus
 16 bit
20 bit
32 bit
4.
Physical Memory
 16 KB
1 MB
4 GB
5.
Register size
8 bit
16 bit
32 bit
6.
No. of transistors
6,500
29,000
2,75,000
7.
Pipelining
No
Yes
Yes
8.
Operating Modes
Single Mode
1) Maximum,
2) Minimum
1) Real,
2) Protected,
3) Virtual
9.
Addressing modes
Five
Twenty two
Eleven
10.
Clock speed
3 MHz
5, 8 and 10 MHz
12 MHz to 40 MHz
11.
Memory Mgt. Unit
External
External
Internal
12.
IC Pin Packaging
40 DIP
40 DIP
132 PGA
13.
Virtual Addressing
Does not support
Does not Support
64 TB Virtual Memory
14.
Memory Segment Size
Memory is continuous and not divided into segments
64KB
Max. 4GB
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