4. Digital Computer:
The digital computer is a digital system
that performs various computational tasks.
The word digital implies that the
information in the computer is
represented by variables that take a
limited number of discrete values.
Digital Computer use the binary number
system(i.e 0 & 1).A binary digit is called a
bit.
The program included in a system
software package are reffered to as the
operating system.
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5. Computer System:
A computer system is divided into 2 functional entities:
1. Hardware
2. Software
Hardware :A hardware of the computer consists of all
the electronic components and electromechanical
devices that comprise the physical entity of the device.
Software:A system software of a computer consists of a
collection of programs whose purpose is to make more
effective use of the computer.
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6. Uses Of Computer Organization And
Microprocessor
We need to understand
computer architecture in order to
structure a program so that it
runs more efficiently on a real
machine.
The computer designer must
have an understanding of
software in order to implemeant
the optimum architecture.
It helps to understand the
operation of a typical computing
machine & understand how
various peripheral devices
interact with, and how they are
interfaced to a CPU.
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7. Basic Issues:
Computer Architecture: The Architecture
of a computer is concerned with the
structure and behavior of the computer
as viewed by a user such as an assembly
or machine language programmer.
An assembly or machine language
programmer needs to be aware of
specific instructions supported by the
processor , the instruction formats , the
specific registers and their roles the
techniques for accessing the data stored
in the memory etc…
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8. Basic Issues:
Computer Organization: It is concerned
with the way the hardware components
operate and they are connected together
to form the computer system.
It can help to understand the internal
operations that are carried out by a
computer while a program is being
executed .
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9. Basic Organization of computer:
Processor: The CPU is responsible for fetching an
instruction stored in the memory and executing it . It
contains arithmetic and logical unit for manipulating the
data .
Main Memory : It is also called as random access
memory because the CPU can access any location in
memory at random and either retrieve the binary
information stored at that location.
Monitor: It displays unit and serves as the primary
output unit .It is capable of displaying high quality
graphics and animations.
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10. Basic Organization of computer:
Key Board: It is primary input device.
Peripheral Device : It can be attached to the backplane bus .
Ex: Printer, Loud Speaker, Scanner , Cameras …
Back plane Bus :A single bus interconnecting all the components
of a computer is called as a backplane bus.
The single bus can be considered to be backbone connection
medium , to which various components of computer are
attached.
It is a group of wires. These wires are partitioned into control and
address wires. The control wires control signals to different units.
The address wires carry the address of the specific data in
memory and data wires are used to carry the data.
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11. Summary
Here is what we learned:
Digital Computer: The digital computer is a digital system that
performs various computational tasks.
Uses Of COA:runs more efficiently on a real machine,
understanding of software in order to implemeant the optimum
architecture, understand the operation of a typical computing ,
understand how various peripheral devices interact with, and how
they are interfaced to a CPU.
Basic Issues: Computer Architecture , Computer Organization
Basic Organization of computer: Processor, Main Memory,
Monitor, Key Board , Peripheral Device , Back plane Bus .
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Conclusion
