P1_Evolution of Intel Microprocessors - PART1.ppt

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CONTENTS
 Introduction.
 4-Bit Microprocessors.
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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.
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4-BIT MICROPROCESSORS

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INTEL 4004
 Introduced in 1971.
 It was the first
microprocessor by Intel.
 It was a 4-bit µP.
 Its clock speed was
740KHz.
 It could execute around
60,000 instructions per
second.
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INTEL 4040
 It was also 4-bit µP.
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INTEL 8008
 It was first 8-bit µP.
 Its clock speed was 500
KHz.
 Could execute 50,000
instructions per second.
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INTEL 8080
 Its clock speed was 2
MHz.
 Was 10 times faster
than 8008.
 Could execute 5,00,000
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INTEL 8085
 Its clock speed was 3 MHz.
 Its data bus is 8-bit and
address bus is 16-bit.
 Could execute 7,69,230
 It could access 64 KB of
memory.
 It had 246 instructions.
 Over 100 million copies
were sold.
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INTEL 8086
 It was first 16-bit µP.
 Its clock speed is 4.77 MHz, 8
MHz and 10 MHz, depending on
the version.
 Could execute 2.5 million
 It could access 1 MB of memory.
 It had 22,000 instructions.
 It had Multiply and Divide
instructions.
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INTEL 8088  Introduced in 1979.
 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
 This chip became the most
popular in the computer
industry when IBM used it
for its first PC.
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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
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INTEL 80286  Introduced in 1982.
 It was 16-bit µP.
 Its clock speed was 8 MHz.
 It could address 16 MB of
memory.
 It could execute 4 million
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P1_Evolution of Intel Microprocessors - PART1.ppt

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