2.1 system concept
- 1. Computer
- 3. 2.1 2.2 2.4 2.5 2.6 System Concept Number System & Logic Gate & Hardware Software Representation Simple Logic Circuit 2.5.1 Motherboard 2.6.1 System 2.1.1 Overview of Software Computer System 2.4.1 Boolean Expression 2.5.2 Processor 2.2.1 Binary 2.6.2 Application 2.1.2 Software 2.2.2 2.4.2 Logic Gate Data Hexadecimal 2.5.3 Memory Representation 2.5.4 Input and 2.4.3 Simple Logic Output device 2.1.3 Storage Circuit Capacity 2.5.5 Storage 2.3 Information Coding 2.5.6 Adapter Scheme Card
- 4. 2.1.1 OVERVIEW OF COMPUTER SYSTEM 2.1 2.1.2 DATA REPRESENTATION SYSTEM 2.1.3 STORAGE CAPACITY
- 5. 2.1 System Concept 2.1.1 Overview of Computer System Learning Outcomes : - Identify the processes involved in a computer
- 6. 2.1 System Concept 2.1.1 Overview of Computer System What is Computer? An electronic device that accepts input, process data and produces output. Computer Concept 2011
- 7. 2.1 System Concept 2.1.1 Overview of Computer System What is Computer System? a complete, working computer that includes operating system, software and hardware which are necessary to make the computer function
- 8. 2.1 System Concept 2.1.1 Overview of Computer System Components of Computer System
- 9. 2.1 System Concept 2.1.1 Overview of Computer System Basic processes in computer
- 10. 2.1 System Concept 2.1.1 Overview of Computer System Input-Process-Output (IPO) Model Storage
- 11. 2.1 System Concept 2.1.1 Overview of Computer System
- 12. 2.1 System Concept 2.1.1 Overview of Computer System
- 13. 2.1 System Concept 2.1.1 Overview of Computer System
- 14. 2.1.1 OVERVIEW OF COMPUTER SYSTEM 2.1 2.1.2 DATA REPRESENTATION SYSTEM 2.1.3 STORAGE CAPACITY
- 15. 2.1 System Concept 2.1.2 Data Representation Learning Outcome : - Explain how data is represented in computer
- 16. 2.1 System Concept 2.1.2 Data Representation How does a computer represent data? By using two unique binary digits 1 and 0 to represent the two states on and off. computer recognizes only two discrete electrical states (on and off)
- 17. 2.1 System Concept 2.1.2 Data Representation Bit A binary digit (1 or 0). The smallest unit of data. Represents an electrical state (on or off). Bit 1 represents On. Bit 0 represents Off. Byte A group of 8 bits (ex:11110000). Represents a character such as a digit, a letter, a punctuation mark or any symbol in computer.
- 18. 2.1 System Concept 2.1.2 Data Representation Example : 00110100 represents 4 00110110 represents 6 01000101 represents E
- 19. How a letter is converted to binary form and back Step 1. Step 2. The user An electronic signal presses the for the capital letter D capital letter is sent to the system D on the unit. keyboard. Step 4. Step 3. After processing, the binary The signal for the capital letter D is code for the capital letter D is converted to its binary code converted to an image, and (01000100) and is stored in memory displayed on the monitor. for processing.
- 20. 2.1.1 OVERVIEW OF COMPUTER SYSTEM 2.1 2.1.2 DATA REPRESENTATION 2.1.3 STORAGE CAPACITY SYSTEM
- 21. 2.1 System Concept 2.1.3 Storage Capacity Learning Outcomes : - Differentiate various size of storage capacity
- 22. 2.1 System Concept 2.1.3 Storage Capacity Capacity – The number of bytes(characters) can be hold by storage medium
- 24. 2.1 System Concept 2.1.3 Storage Capacity Measured in units such as KB, MB, GB The capacity of a storage medium is measured by the number of bytes it can hold
- 25. 2.1 System Concept 2.1.3 Storage Capacity Measured in units such as KB, MB, GB 1 KB 1024 bytes 1 MB 1024 KB ( about 1 million bytes ) 1 GB 1024 MB ( about 1 billion bytes ) 1 TB 1024 GB ( about 1 trillion bytes )
- 26. 2.1 System Concept 2.1.3 Storage Capacity Typical storage and capacities Storage Capacity A few hundred kilobytes to Tape drive several gigabytes Diskette 1.44 MB CD-ROM 650 MB – 1GB Hard disks External hard disk Up to 4TB or more Removable hard UP to 1TB or more disk
- 27. 2.1 System Concept 2.1.3 Storage Capacity DVD and Blu-ray Storage Capacities Sides Layers DVD Blu-ray 1 1 4.7GB 25GB 1 2 8.5GB 50GB 2 1 9.4GB 50GB 2 2 17GB 100GB
- 28. 2.1 System Concept 2.1.3 Storage Capacity Typical of Flash Memory Storage Storage Capacities Solid State Drives(SSD) 16GB – 256GB Memory cards 512MB – 100GB Compact Flash(CF) 512MB – 8GB Secure Digital(SD) 4GB – 32GB SDHC 256MB – 2GB XD Picture Card 512MB – 100GB USB Flash Drive
- 29. 2.1 System Concept 2.1.3 Storage Capacity Example 1 : Convert 1GB to KB
- 30. 2.1 System Concept 2.1.3 Storage Capacity Example 2 : Convert MB to GB 1200 MB = 1200/1024 = 1.17 GB
- 31. 2.1 System Concept 2.1.3 Storage Capacity SUMMARY Definition of computer. Definition of computer system. The components of a computer system. Types of hardware. Types of software. Basic operations/processes involved in a computer. How is data represented. Definition of bit and byte. Units of data measurement. Storage capacity Converting units of data measurement.
Editor's Notes
- #11: Storage capacity is another term for "disk space." It measures how much data a computer system may contain. For example, a computer with two 750GB hard drives has a storage capacity of 1.5TB. Storage capacity is commonly included in the technical specifications of a system, along with processing power and memory . It is possible to increase the storage capacity of most systems by adding additional internal or external hard drives. A computer storage device is any type of hardware that stores data. The most common type of storage device, which nearly all computers have, is a hard drive . The computer's primary hard drive stores the operating system, applications, and files and folders for users of the computer. While the hard drive is the most ubiquitous of all storage devices, several other types are common as well. Flash memory devices, such as USB keychain drives and iPod nanos are popular ways to store data in a small, mobile format. Other types of flash memory, such as compact flash and SD cards are popular ways to store images taken by digital cameras. External hard drives that connect via Firewire and USB are also common. These types of drives are often used for backing up internal hard drives, storing video or photo libraries, or for simply adding extra storage. Finally, tape drives, which use reels of tape to store data, are another type of storage device and are typically used for backing up data.
- #17: computer recognizes only two discrete electrical states (on or off)
- #27: Not only are bits and bytes used as the language that tells the computer what to do, they are also what the computer uses to represent the data and information it inputs and outputs. Kilobytes, megabytes, and gigabytes are therefore simply amounts of bytes.