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L.A 2 COMPUTER SYSTEMS
TOPICS ,[object Object],[object Object],[object Object],[object Object],[object Object]
Define Computer Systems ,[object Object]
Meaning of Input Process Output  Storage  Input is any data or instruction entered into the computer system for processing.  The processing unit controls all activities within the system. Output is data that has been processed into a useful form, called information Storage is a location which data, instruction and information are saved for future use
Information Processing Cycle Process  Output Input Storage Block diagram of Information Processing Cycle (CPU)
Input ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Process ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Fetch Decode  Store  Execute  1 2 3 4
Process ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Fetch Decode  Store  Execute  1 2 3 4 3
SYSTEM CONCEPT ,[object Object],[object Object],[object Object],[object Object],[object Object]
Data Representation ,[object Object],[object Object],[object Object],How do computers represent data?
Data Representation ,[object Object],[object Object],[object Object],[object Object],[object Object],Bit, Byte and Character L.O :State the relationship of data representation: bit, byte and character.
Data Representation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Bit, Byte and Character L.O :State the relationship of data representation: bit, byte and character.
Data Representation ,[object Object],[object Object],Bit, Byte and Character Eight  bits  grouped together as a unit are called a  byte . A byte represents a single  character  in the computer. bit byte character L.O :State the relationship of data representation: bit, byte and character.
Introduction to Binary Coding ,[object Object],[object Object],[object Object],What are three popular coding systems to represent data? L.O :Explain the function of ASCII code. ASCII Symbol EBCDIC 00110000 0 11110000 00110001 1 11110001 00110010 2 11110010 00110011 3 11110011
ASCII ,[object Object],[object Object],L.O :Explain the function of ASCII code.
ASCII ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],L.O :Explain the function of ASCII code.
ASCII ,[object Object],Step 2. An electronic signal for the capital letter  T  is sent to the system unit. Step 3. The signal for the capital letter  T  is converted to its ASCII binary code (01010100) and is stored in memory for processing. L.O :Explain the function of ASCII code. Step 1. The user presses the capital letter  T  (shift+T key) on the keyboard. Step 4. After processing, the binary code for the capital letter  T  is converted to an image, and displayed on the output device. T
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data Measurement L.O :State the units of data measurement Why is 1024 bytes = 1KB? 2 0  = 1 2 1  = 2 2 2  = 4 2 3  = 8 2 4  = 16 2 5  = 32 2 6  = 64 2 7  = 128 2 8  = 256 2 9  = 512 2 10  = 1024
Clock Speed Measurement L.O :State the units of clock speed  measurement Every microprocessor contains a system clock. The system clock controls the speed of all the operations within a computer. The speed of the clock is measured by how many cycles per second the clock makes. The clock speed unit is measured in  hertz . A hertz is one cycle per second. megahertz (MHz) equals to one million cycles of the system clock  Gigahertz (GHz) equals to one billion cycles of the system clock
Which is faster ? Pentium 4 running at 2.4 GHz is approximately one-third faster than a Pentium 4 running at 1.8 GHz. One way of comparing the performance of personal computers is by comparing their  microprocessor speeds . Microprocessor speeds are determined by their  clock speed  and are usually expressed in gigahertz (GHz),  billion of machine cycles per second.
HARDWARE ,[object Object],[object Object],[object Object],[object Object]
Input Devices ,[object Object],[object Object],L.O :Identify the input devices used for text, graphic, audio and video Text   graphic sound  video
Input Devices ,[object Object],[object Object],L.O :Identify the input devices used for text, graphic, audio and video
Input Devices ,[object Object],L.O :Identify the input devices used for text, graphic, audio and video ,[object Object]
Input Devices ,[object Object],L.O :Identify the input devices used for text, graphic, audio and video ,[object Object]
Input Devices ,[object Object],L.O :Identify the input devices used for text, graphic, audio and video mouse Pointing stick touchpad joystick trackball
Output Devices ,[object Object],[object Object],L.O :Identify the input devices used for text, graphic, audio and video
[object Object],Output Devices Monitor printer   LCD DLP Photo printer speaker   headphone   woofer
L.O :Identify the location of ports A port is an interface on a computer to which you can connect a device such as printer, flash drive and mouse
[object Object],Motherboard  ,[object Object],[object Object],[object Object],L.O :Identify the Location of the CPU, expansion slots, expansion cards, RAM slots, ports and connectors on the motherboard
 
 
L.O : Explain types and function of Primary Storage
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Storage
Primary Storage ,[object Object],The more RAM a  computer has, the  faster it responds Also called  main memory  or primary  storage Most RAM is  volatile, it is lost  when computer’s  power is  turned off Memory chips that can be  read from and written  to by processor
Primary Storage ,[object Object],Memory chips that store  permanent data  and instructions Nonvolatile memory , it is not  lost when computer’s  power is turned off Three types: Firmware — Manufactured with  permanently written  data, instructions,  or information EEPROM   ( e lectrically  e rasable  p rogrammable  r ead- o nly  m emory)— Type of PROM  containing microcode  programmer  can erase PROM   ( p rogrammable  r ead- o nly  m emory)— Blank ROM  chip onto which  a programmer  can write permanently
[object Object],[object Object],[object Object],Secondary Storage
[object Object],Secondary Storage

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System concept and hardware

  • 1. L.A 2 COMPUTER SYSTEMS
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  • 4. Meaning of Input Process Output Storage Input is any data or instruction entered into the computer system for processing. The processing unit controls all activities within the system. Output is data that has been processed into a useful form, called information Storage is a location which data, instruction and information are saved for future use
  • 5. Information Processing Cycle Process Output Input Storage Block diagram of Information Processing Cycle (CPU)
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  • 19. Clock Speed Measurement L.O :State the units of clock speed measurement Every microprocessor contains a system clock. The system clock controls the speed of all the operations within a computer. The speed of the clock is measured by how many cycles per second the clock makes. The clock speed unit is measured in hertz . A hertz is one cycle per second. megahertz (MHz) equals to one million cycles of the system clock Gigahertz (GHz) equals to one billion cycles of the system clock
  • 20. Which is faster ? Pentium 4 running at 2.4 GHz is approximately one-third faster than a Pentium 4 running at 1.8 GHz. One way of comparing the performance of personal computers is by comparing their microprocessor speeds . Microprocessor speeds are determined by their clock speed and are usually expressed in gigahertz (GHz), billion of machine cycles per second.
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  • 29. L.O :Identify the location of ports A port is an interface on a computer to which you can connect a device such as printer, flash drive and mouse
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  • 33. L.O : Explain types and function of Primary Storage
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Editor's Notes

  1. Input is any data or instruction entered into the computer system for processing.