Hardware

1
Programming

• Hardware

2
Hardware

• 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

3
Hardware
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)

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

6
Types of Computer Jobs

• 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