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CS5CRT14: System Software and Operating Systems (Core) Unit I

The document discusses several topics related to system software and operating systems including: - The definition and examples of system software, including operating systems, BIOS, boot programs, assemblers, and device drivers. - Language processing concepts and the fundamentals of language processing and specification, including programming language grammar and classifications of grammar. - Elements of assembly language programming, the design of assemblers, and the definition, call, and expansion of macros in assembly languages.

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Donis Abraham
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276 views2 pages

CS5CRT14: System Software and Operating Systems (Core) Unit I

The document discusses several topics related to system software and operating systems including: - The definition and examples of system software, including operating systems, BIOS, boot programs, assemblers, and device drivers. - Language processing concepts and the fundamentals of language processing and specification, including programming language grammar and classifications of grammar. - Elements of assembly language programming, the design of assemblers, and the definition, call, and expansion of macros in assembly languages.

Uploaded by

Donis Abraham
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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CS5CRT14 : System Software and Operating Systems (Core)

Unit I

System software- General concepts,

Language processing concepts,

Fundamentals of Language processing,

Fundamentals of language specification - Programming Language Grammar,

Classification of grammar.

Assemblers: Elements of assembly language programming – assembly language statements,

Design specification of an assembler.

Macros: Definition- Call- Expansion.

1) System software- General concepts

 System software is a type of computer program that is designed to run a computer’s hardware
and application programs.
 The system software is the interface between the hardware and user applications.
 The operating system (OS) is the best-known example of system software. The OS manages all
the other programs in a computer.

Other examples of system software include:

 The BIOS (basic input/output system) gets the computer system started after you turn it on and
manages the data flow between the operating system and attached devices such as the hard
disk, video adapter, keyboard, mouse and printer.

 The boot program loads the operating system into the computer's main memory or random access
memory (RAM).

 An assembler takes basic computer instructions and converts them into a pattern of bits that the
computer's processor can use to perform its basic operations.

 A device driver controls a particular type of device that is attached to your computer, such as a
keyboard or a mouse. The driver program converts the more general input/output instructions of the
operating system to messages that the device type can understand.
2) Language processing concepts

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