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System Programming

CS-

Lecture 1

FAHEEM NAWAZ KHAN

Educational Background

• (^) Education
  • (^) BS(IT) Information Technology(2009)

SEECS-NUST H-12 Islbd

• (^) MSCS in Information Retrieval (2015)

Muhammad Ali Jinnah University(MAJU),

Islbd

2

Course Information

• (^) Course Code: CS 421
• (^) Course Name System Programming
• (^) Course Objective: This course will give students a closer look at various functions of a computer system and system programming; To gain insight into the implementation of an operating system from a programmer's perspective using C/C++ programming construct; To develop the ability to use a variety of components of the system libraries in design of system application considering concurrency, communication, portability, optimization and security concerns; To develop an understanding of the various components of the Operating Systems; Ability to build different system utilities for UNIX/LINUX environment; To develop ability of self-learning. 4

Reference Material

• (^) Mansoor Sarwar, Robert Koretsky, and Aqeel

Sarwar, “UNIX: The Text Book”, 2nd Ed.,

Pearson Education, 2007. ISBN 81-317-1606-

• (^) Neil Methew, Richard Stones “Beginning

Linux Programming”, 3rd Ed., Wiley

Publishing, Inc., 2004. ISBN 0-7645-4497-

• (^) W. Richard Stevens, “Advance Programming

in the UNIX Environment”, 2nd Ed., Pearson,

2005. ISBN 978-81-317-0005-1.

• (^) Operating Systems Internals and Design

Principles , 6th^ Edition, by William Stallings

Course Outline

• (^) Introduction to System Programming
• (^) Interrupt Mechanism
• (^) Interrupts Description
• (^) Use of ISR’s for Library Function
• (^) Interrupt Interception
• (^) Timer & Keyboard Interrupt Program
• (^) EOI Code for Slave IRQ
• (^) Microprocessor Signals
• (^) Registers
• (^) Parallel Ports (PPI)
• (^) Direct Parallel Port Programming
• (^) DMA Modes
• (^) Types Of Serial Communication
• (^) Static and Dynamic Libraries:
• (^) Process Environment
• (^) Memory management 7

What is System Programming? Application Programming System Programming Input Process Output

Means of Input Output Programmed input output Interrupt driven Direct Memory Access

Other

Processing

Computation

for I./O

I/O

Programmed I/O

Time

DMA Controller

I/O device

I/O controller

CPU

I/O control signals Buffering Error Correction and Detection

DMA Driven I/O

I/O

DMA

CPU

Register

Main Memory

3. Input/Output Interrupts
   • from I/O controller, (Normal IO operation, IO Error)
4. Hardware failure Interrupt
   • e.g. memory parity error (error in data) Interrupts

Interrupt Controller

• (^) Handles the Priorities among hardware interrupt

Program Timing (Short I/O Wait)

Program Timing (Long I/O Wait)