CSCE 313 Lecture 1

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Instructor Information

• Dr. Guofei Gu
• guofei@cse.tamu.edu
• R 1-2:30pm
• ...

3 Components to Computer Systems:

1. Operating System: A bridge between developer/user and hardware
2. Computer Networking
3. Security

Labs

Acquire a working knowledge of one widely used application interface (POSIX) to an operating system (UNIX/Linux)

There will be three machine problems in which I need to program a lot in C

Turned in to CSNET

Homework

4 individual programming assignments (no teams)

Operating System

Four Components of a Computer System

1. Users
2. System and application programs (compiler, assembler, text editor, database, etc)
3. Operating system
4. Computer hardware

An OS is NOT

• a language or compiler
• a command interpreter or windowing system
• a library of commands
• a set of utilities

History of Computer Systems

1949-1956

Single-user writes program and operates through console, punch-card reader; outputs to printer

All programs written in machine language

Development of libraries, device drivers, compilers, linkers, loaders, portable (system-independent) code

1956-1963

Automation of load/translate/load/execute for scheduling and setup

batch systems, watchdogs, job-control language

oqerlapping of CPU with I/O systems: batch (online execution) executes linearly, whereas off-line and spooling process all input, then tell CPU to execute them.

1964-1975

Multiprogramming; advent of processes

Mony programs in memory; scheduler queues programs while CPU is idle or waiting for I/O

New issues to deal with scheduling; Memory management & protection

Tme Sharing: interleaving of process execution with set time quantum.