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COMP102 Prog. Fundamentals I: Hardware / Slide 2
Four components of a computer system: CPU - central processing unit
– Makes decisions, performs computations, and delegates input/output requests
Memory– Stores information
Input devices– Gets information from the user to the computer
Output devices– Sends information from computer to the user
Hardware
COMP102 Prog. Fundamentals I: Hardware / Slide 4
CPU
“Brains” of the computer Arithmetic calculations are performed using the
Arithmetic/Logical Unit (ALU) Control unit decodes and executes instructions
Arithmetic operations are performed using binary number system 0110 1101 1100 1111 0001
CPU Examples Pentium (for ordinary PC) Sparc (for SUN workstation) PowerPC (for MacIntosh) K6 (for PC compatible)
COMP102 Prog. Fundamentals I: Hardware / Slide 5
Input and Output Devices
Accessories that allow computer to interface with user
Common input and output devices Speakers Mouse Scanner
Printer Joystick CD-ROM
Keyboard Microphone
COMP102 Prog. Fundamentals I: Hardware / Slide 6
Application level jobs: word processor, graphics designer,
HTML designer, program tester Programmer level
jobs: C++ programmer, DSP programmer Systems level
jobs: operating system designer, web master, systems maintenance staff
Hardware level jobs: VLSI chip designer, hardware designer
Types of Computer Jobs