WHAT IS COMPUTER ?
2 IMPORTANT ELEMENTS :
- Hardware
- Software
ARCHITECTURE & ORGANISATION
What is architecture ?
- those attributes visible to the programmer
- Instruction set, number of bits used for data representation, I/O mechanisms, addressing techniques.
- how features are implemented
- Control signals, interfaces, memory technology.
STRUCTURE & FUNCTION
structure :
- the way in which components relate to each other.
- top-level :
From the Top-Level Structure, a computer consists of four main structural components, which are:
- Central processing unit (CPU) – referred as processor, perform data processing and control the operation of the computer
- Main memory – stores data
- I/O – move data between the computer and its external environment
- System interconnection - provides communication among CPU, maim memory and I/O
- the CPU
CPU itself consists of several components such as:
- registers – provides storage internal to the CPU
- arithmetic and logic unit (ALU) – perform data processing function
- control unit – control the operation of CPU
- internal CPU interconnection – provides communication among ALU, registers and control unit
function :
- the operation of individual components as part of the structure.
- four basic functions performed by a computer system :
--> data processing
--> data storage (long term data storage function and short term data storage function)
--> data movement (movement between computer and peripheral known as input / output (I/O), movement over longer distances known as data communication)
--> control
CLASSES OF COMPUTERS :
- Desktop computer
- Server computer
- Embedded computer
COMPUTER TYPES :
~ microcomputer ~
~ workstation ~
~ mainframe ~
~ supercomputer ~
Posted by : SiTi FaIdZaH BiNtI AbDuL RaZak, B031310310