Fichas
Unit 2: Computer Hardware
Fichas del conjunto (23)
- 1HardwarePhysical components of a computer system
- 2CPU(Central Processing Unit) functionFetch the instruction from memory
Decode the instruction to find out what processing to do
Execute the instruction - 3RAM (Random Access Memory)-RAM contains data the computer is currently using
-Data is taken from secondary storage, so the CPU can access it quicker
-Is Volatile, data is lost when power is lost
-Contains operating system - 4ROM (Read Only Memory)Non-Volatile
-Stores the boot sequence
-Cannot be overwritten
-Contains boot program - 5Boot SequenceContains all the information and instructions to get the computer up and running.
- 6Boot LoaderProgram that starts the boot sequence
- 7CPU speed depends on....Processor Speed
Cache Size
Number of Cores - 8Processor SpeedDetermined by a electronic clock chip. Measured in cycles per second(hertz Hz)
- 9CacheHigh speed memory in the CPU.
Expensive. - 10ALU (Arithmetic Logic Unit)Carries out arithmetic and logical operations
- 11Control UnitUses electrical signals to control flow of data in the CPU
- 12MemoryMemory size increases as price and speed decreases
Cache-RAM-Secondary Storage - 13Multiple Processor CoresMore data processed.
Need more complicated operating system to manage it - 14Virtual MemoryExtension of RAM in hard drive when RAM overflows. Created by Operating system. Slower than RAM
- 15Flash MemoryType of ROM that can be written.
Portable Storage - 16Triangle GateNot Gate
- 17D GateAnd Gate
- 18Curved D GateOr Gate
- 19Magnetic StorageReliable
High Capacity
Low Cost
Not portable(moving parts, large) - 20Optical StorageGood Capacity
Low Cost
Lightweight/Portable - 21Flash/Solid State MemoryGood Capacity
Hand Held Devices
Expensive - 22Storage ConsiderationsCapacity
Speed
Portability
Durability
Reliability - 23—
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- Computing Revision Fichas sobre Unit 2: Computer Hardware, creado por Andrew Stonehouse el 21/04/2017.
- Creado por
- Andrew Stonehouse
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