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