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SYSTEM SOFTWARE SYLLABUSS

AIM
To have an understanding of foundations of design of assemblers,
loaders, linkers, and macro processors.

OBJECTIVES
• To understand the relationship between system software and machine
architecture.
• To know the design and implementation of assemblers
• To know the design and implementation of linkers and loaders.
• To have an understanding of macroprocessors.
• To have an understanding of system software tools.

UNIT I INTRODUCTION 8
System software and machine architecture – The Simplified
Instructional Computer (SIC) - Machine architecture - Data and
instruction formats - addressing modes - instruction sets - I/O and
programming.

UNIT II ASSEMBLERS 10
Basic assembler functions - A simple SIC assembler – Assembler
algorithm and data structures - Machine dependent assembler features -
Instruction formats and addressing modes – Program relocation -
Machine independent assembler features - Literals – Symbol-defining
statements – Expressions - One pass assemblers and Multi pass
assemblers - Implementation example - MASM assembler.

UNIT III LOADERS AND LINKERS 9
Basic loader functions - Design of an Absolute Loader – A Simple
Bootstrap Loader - Machine dependent loader features - Relocation –
Program Linking – Algorithm and Data Structures for Linking Loader -
Machine-independent loader features - Automatic Library Search –
Loader Options - Loader design options - Linkage Editors – Dynamic
Linking – Bootstrap Loaders - Implementation example - MSDOS linker.

UNIT IV MACRO PROCESSORS 9
Basic macro processor functions - Macro Definition and Expansion –
Macro Processor Algorithm and data structures - Machine-independent
macro processor features - Concatenation of Macro Parameters –
Generation of Unique Labels – Conditional Macro Expansion – Keyword
Macro Parameters-Macro within Macro-Implementation example - MASM
Macro Processor – ANSI C Macro language.

UNIT V SYSTEM SOFTWARE TOOLS 9
Text editors - Overview of the Editing Process - User Interface –
Editor Structure. - Interactive debugging systems - Debugging
functions and capabilities – Relationship with other parts of the
system – User-Interface Criteria.

TOTAL : 45
TEXT BOOK
1. Leland L. Beck, "System Software – An Introduction to Systems
Programming", 3rd Edition, Pearson Education Asia, 2000.
REFERENCES
1. D. M. Dhamdhere, "Systems Programming and Operating Systems",
Second Revised Edition, Tata McGraw-Hill, 1999.
2. John J. Donovan "Systems Programming", Tata McGraw-Hill Edition,
1972.

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