History of Microprocessors

History of Microprocessors

CONTENTS

Introduction

⮚ 4-Bit Microprocessors

⮚ 8-Bit Microprocessors

⮚ 16-Bit Microprocessors

⮚ 32-Bit Microprocessors

⮚ 64-Bit Microprocessors

INTRODUCTION:

Fairchild Semiconductors (founded in 1957) invented the first IC in 1959.
In 1968, Robert Noyce, Gordan Moore, Andrew Grove resigned from Fairchild Semiconductors.
They founded their own company Intel (Integrated Electronics).
Intel grown from 3 man start-up in 1968 to industrial giant by 1981.
It had 20,000 employees and $188 million revenue.

4-BIT MICROPROCESSORS INTEL 4004

Introduced in 1971.

It was the first microprocessor by Intel.
It was a 4-bit µP.
Its clock speed was 740KHz.
It had 2,300 transistors.
It could execute around 60,000 instructions per second

INTEL 4040

Introduced in 1974.
It was also 4-bit μP.

8-BIT MICROPROCESSORS

INTEL 8008

Introduced in 1972.
It was first 8-bit μP.
Its clock speed was 500 KHz.
Could execute 50,000 instructions per second.

INTEL 8080

Introduced in 1974.
It was also 8-bit μP.
Its clock speed was 2 MHz.
It had 6,000 transistors.
Was 10 times faster than 8008.
Could execute 5,00,000 instructions per second.

INTEL 8085

Introduced in 1976.
It was also 8-bit μP.
Its clock speed was 3 MHz.
Its data bus is 8-bit and address bus is 16-bit.
It had 6,500 transistors.
Could execute 7,69,230 instructions per second.
It could access 64 KB of memory.
It had 246 instructions.
Over 100 million copies were sold.

16-BIT MICROPROCESSORS

INTEL 8086

Introduced in 1978.
It was first 16-bit μP.
Its clock speed is 4.77 MHz, 8 MHz and 10 MHz, depending on the version.
Its data bus is 16-bit and address bus is 20-bit.
It had 29,000 transistors.
Could execute 2.5 million instructions per second.
It could access 1 MB of memory.
It had 22,000 instructions.
It had Multiply and Divide instructions.

INTEL 8088

Introduced in 1979.
It was also 16-bit μP.
It was created as a cheaper version of Intel’s 8086.
It was a 16-bit processor with an 8-bit external bus.
Could execute 2.5 million instructions per second.
This chip became the most popular in the computer industry when IBM used it for its first PC.

INTEL 80186 & 80188

Introduced in 1982.
They were 16-bit μPs.
Clock speed was 6 MHz.
80188 was a cheaper version of 80186 with an 8- bit external data bus.
They had additional components like: Interrupt Controller, Clock Generator, Local Bus Controller, Counters

INTEL 80286

Introduced in 1982.
It was 16-bit μP.
Its clock speed was 8 MHz.
Its data bus is 16-bit and address bus is 24-bit.
It could address 16 MB of memory.
It had 1,34,000 transistors.
It could execute 4 million instructions per second.

32-BIT MICROPROCESSORS

INTEL 80386

Introduced in 1986.
It was first 32-bit μP.
Its data bus is 32-bit and address bus is 32-bit.
It could address 4 GB of memory.
It had 2,75,000 transistors.
Its clock speed varied from 16 MHz to 33 MHz depending upon the various versions.
Different versions: 80386 DX, 80386 SX, 80386 SL
Intel 80386 became the best selling microprocessor in history.

INTEL 80486

Introduced in 1989.
It was also 32-bit μP.
It had 1.2 million transistors.
Its clock speed varied from 16 MHz to 100 MHz depending upon the various versions.
It had five different versions: 80486 DX, 80486 SX, 80486 DX2, 80486 SL, 80486 DX4,
8 KB of cache memory was introduced.

INTEL PENTIUM

Introduced in 1993.
It was also 32-bit μP.
It was originally named 80586.
Its clock speed was 66 MHz.
Its data bus is 32-bit and address bus is 32-bit.
It could address 4 GB of memory.
Could execute 110 million instructions per second.
Cache memory: 8 KB for instructions, 8 KB for data.

INTEL PENTIUM PRO

Introduced in 1995.
It was also 32-bit μP.
It had L2 cache of 256 KB.
It had 21 million transistors.
It was primarily used in server systems.
Cache memory: 8 KB for instructions, 8 KB for data.
It had L2 cache of 256 KB.

INTEL PENTIUM II

Introduced in 1997.
It was also 32-bit μP.
Its clock speed was 233 MHz to 500 MHz.
Could execute 333 million instructions per second.
MMX technology was supported.
L2 cache & processor were on one circuit.

INTEL PENTIUM II XEON

Introduced in 1998.
It was also 32-bit μP.
It was designed for servers.
Its clock speed was 400 MHz to 450 MHz.
L1 cache of 32 KB & L2 cache of 512 KB, 1MB or 2 MB.
It could work with 4 Xeons in same system.

INTEL PENTIUM III

Introduced in 1999.
It was also 32-bit μP.
Its clock speed varied from 500 MHz to 1.4 GHz.
It had 9.5 million transistors.

INTEL PENTIUM IV

Introduced in 2000.
It was also 32-bit μP.
Its clock speed was from 1.3 GHz to 3.8 GHz.
L1 cache was of 32 KB & L2 cache of 256 KB.
It had 42 million transistors.
All internal connections were made from aluminium to copper.

INTEL DUAL CORE

Introduced in 2006.
It is 32-bit or 64-bit μP.
It has two cores.
Both the cores have there own internal bus and L1 cache, but share the external bus and L2 cache.
It supported SMT technology.
SMT: Simultaneously Multi- Threading
E.g.: Adobe Photoshop supported SMT.

64-BIT MICROPROCESSORS

INTEL CORE 2

Introduced in 2006.
It is a 64-bit μP.
Its clock speed is from 1.2 GHz to 3 GHz.
It has 291 million transistors.
It has 64 KB of L1 cache per core and 4 MB of L2 cache.
It is launched in three different versions: Intel Core 2 Duo, Intel Core 2 Quad, Intel Core 2 Extreme

INTEL CORE I7

Introduced in 2008.
It is a 64-bit μP.
It has 4 physical cores.
Its clock speed is from 2.66 GHz to 3.33 GHz.
It has 781 million transistors.
It has 64 KB of L1 cache per core, 256 KB of L2 cache and 8 MB of L3 cache.

INTEL CORE I5

Introduced in 2009.
It is a 64-bit μP.
It has 4 physical cores.
Its clock speed is from 2.40 GHz to 3.60 GHz.
It has 781 million transistors.
It has 64 KB of L1 cache per core, 256 KB of L2 cache and 8 MB of L3 cache.

INTEL CORE I3

Introduced in 2010.
It is a 64-bit μP.
It has 2 physical cores.
Its clock speed is from 2.93 GHz to 3.33 GHz.
It has 781 million transistors.
It has 64 KB of L1 cache per core, 512 KB of L2 cache and 4 MB of L3 cache.

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