PPT - Computer Architecture and Organization Computer Science Engineering (CSE) Notes | EduRev

Computer Architecture & Organisation (CAO)

Computer Science Engineering (CSE) : PPT - Computer Architecture and Organization Computer Science Engineering (CSE) Notes | EduRev

 Page 1


Tushar B Kute,
Department of Information 
Technology, Sandip Institute of Technology 
and Research Centre, Nashik.
Page 2


Tushar B Kute,
Department of Information 
Technology, Sandip Institute of Technology 
and Research Centre, Nashik.
… a very wide semantic gap between the intended behavior and the 
workings of the underlying  electronic devices that will actually do all the 
work.
The forerunners to modern computers attempted to assemble the raw 
devices (mechanical, electrical, or electronic) into a separate purpose-
built machine for each desired behavior.
Electronic
Devices
Desired
Behavior
http://www.tusharkute.com 
Page 3


Tushar B Kute,
Department of Information 
Technology, Sandip Institute of Technology 
and Research Centre, Nashik.
… a very wide semantic gap between the intended behavior and the 
workings of the underlying  electronic devices that will actually do all the 
work.
The forerunners to modern computers attempted to assemble the raw 
devices (mechanical, electrical, or electronic) into a separate purpose-
built machine for each desired behavior.
Electronic
Devices
Desired
Behavior
http://www.tusharkute.com 
A general purpose computer is like an island that helps span the gap 
between the desired behavior (application) and the basic building blocks 
(electronic devices).
Electronic
Devices
Desired
Behavior
General
Purpose
Computer
computer
organization
software
http://www.tusharkute.com 
Page 4


Tushar B Kute,
Department of Information 
Technology, Sandip Institute of Technology 
and Research Centre, Nashik.
… a very wide semantic gap between the intended behavior and the 
workings of the underlying  electronic devices that will actually do all the 
work.
The forerunners to modern computers attempted to assemble the raw 
devices (mechanical, electrical, or electronic) into a separate purpose-
built machine for each desired behavior.
Electronic
Devices
Desired
Behavior
http://www.tusharkute.com 
A general purpose computer is like an island that helps span the gap 
between the desired behavior (application) and the basic building blocks 
(electronic devices).
Electronic
Devices
Desired
Behavior
General
Purpose
Computer
computer
organization
software
http://www.tusharkute.com 
• Computer Architecture = ISA + MO
• Instruction Set Architecture
• What the executable can “see” as underlying hardware
• Logical View
• Machine Organization
• How the hardware implements ISA ?
• Physical View
http://www.tusharkute.com 
Page 5


Tushar B Kute,
Department of Information 
Technology, Sandip Institute of Technology 
and Research Centre, Nashik.
… a very wide semantic gap between the intended behavior and the 
workings of the underlying  electronic devices that will actually do all the 
work.
The forerunners to modern computers attempted to assemble the raw 
devices (mechanical, electrical, or electronic) into a separate purpose-
built machine for each desired behavior.
Electronic
Devices
Desired
Behavior
http://www.tusharkute.com 
A general purpose computer is like an island that helps span the gap 
between the desired behavior (application) and the basic building blocks 
(electronic devices).
Electronic
Devices
Desired
Behavior
General
Purpose
Computer
computer
organization
software
http://www.tusharkute.com 
• Computer Architecture = ISA + MO
• Instruction Set Architecture
• What the executable can “see” as underlying hardware
• Logical View
• Machine Organization
• How the hardware implements ISA ?
• Physical View
http://www.tusharkute.com 
• Early 1990’s Apple switched instruction set architecture 
of the Macintosh
• From Motorola 68000-based machines
• To PowerPC architecture
• Intel 80x86 Family: many implementations of same 
architecture
• program written in 1978 for 8086 can be run on latest Pentium 
chip
http://www.tusharkute.com 
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