Process Cycle

1
Process Cycle

• End-User Point of View

2

• 1 Monitor
• 2 Motherboard
• 3 Microprocessor
• 4 Primary Storage RAM
• 5 Expansion Cards
• 6 Power Supply
• 7 CD ROM
• 8 Secondary Storage Hard Drive
• 9 Keyboard
• 10 Mouse

3
Basic Cycle
Process
Input
Output
Storage
4
The First Hobby Computer Altair 8800
5
Input Devices

• Early Devices
• Unit record equipment
• Punched card
• Keyboarding
• Pointing Devices
• Video
• Audio
• Composite

6
Keyer
7
Chorded keyboard
8
LPFK

• The Lighted Program Function Keyboard (LPFK) is a
  computer input device manufactured by I.B.M. that
  presents an array of buttons associated with
  lights. Each button is associated to a function
  in supporting software, and according to the
  availability of that function in current context
  of the application, the light is switched on or
  off, giving the user a graphical feedback on the
  set of available functions. Usually the button to
  function mapping is customizable.

9
Output Devices

• Visual display unit
• Speaker
• Computer printer, including
• Dot matrix printer
• Inkjet printer
• Laser printer
• Thermal printer
• LED printer

10
Storage

• Punched Cards
• Paper recording tape
• Magnetic Recording Tape
• Hard Drive
• Floppy
• Flash ROM
• CD-Read/Write
• Garbage Can!!!