Slide 1System Programming
Bhagyashree Naruka
ASET
Software
Software is a collection of computer programs and related data that provide the instructions for telling a computer what to do and how to do it.
In other words, software is a conceptual entity which is a set of computer programs, procedures, and associated documentation concerned with the operation of a data processing system.
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Application software usually used by end-user
It is concerned with the solution of some problem, using the computer as a tool, instead of how computers actually work.
System software
System software consists of a variety of programs that support the operation of a computer (ex: text editor, compiler, debugger)
One characteristic in which most system software differ from application software is machine dependency
A system software programmer must know the target machine structure
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Mgmt Mgmt
sorting
Major design options
There is no single “right” way of doing things; a software designer needs to be aware of the available options in order to make intelligent decisions
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Machine dependent system software
System programs are to support the operation and use of the target computer.
The difference between different machine
Machine code
Instruction formats
Addressing mode
Code optimization
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Text editor
Operating system
Text editor: Software that permits the creation and editing of
text (i.e. application programs).
language to object code or machine code.
Assembler: Translates programs written in assembly language to
object code or machine code.
Static Linker: Combines and resolves references between object
programs and creates the executable code.
Debugger It is used to debug executable programs and their
(low-level) related object code and source program.
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Libraries:
Precompiled programs the creates a set of functions for use by
other programs.
Dynamic Linker:
Operating system:
An event driven program that make an abstraction of the computer
system. The operating system handles all resources efficiently,
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