SOME DEFINITIONS IN DATA STORAGE
Data storage: Movement of data from one storage medium to computer memory.
Data compression: The process of condensing data so that it requires fewer bytes for storage.
Data transfer rate: The speed at which data can be transformed between the storage medium and computer memory. Transfer rates are expressed in bytes per second (bps).
Data transport: Data travels from one location to another within the computer on an electrical pathway or circuit called a data bus. The data bus is a series of circuits that connects the various electrical components on the motherboard. The bus contains data lines and address lines. Data lines carry the signal that represent data while address line carries signal that specify where the computer can find this data that it is supposed to process
MICROPROCESSOR AND MEMORY
The microprocessor is also referred to as the CPU (or at time simply the processor). It is a silicon chip (integrated circuit) designs to control data.
It main function is to execute instruction to process data.
This information and data are retrieved from the RAM so that it can be displayed and stored.
The CPU has three components (The Control Unit, ALU and the Memory). The two main components are the Control Unit and the ALU.
The ALU does all the arithmetic and logical operations needed for the computer to solve a particular problem.
The ALU uses register to hold data that are being processed.
The result of an arithmetic or logical operation is stored on the accumulator.
From the accumulator the data can be send to the RAM or use for further processing.
THE CONTROL UNIT:
It main function is to execute the instruction which have been stored in the memory
It reads and interprets programme instruction (the process of interpreting is term decoding).
The Control Unit directs the movement of data from the RAM to the ALU
This movement is made possible by the use of data buses (buses refers to the belt-like cables in the System Unit use to transmit data and information).
In conclusion; the function of the Control Unit is to ; Fetch the instruction, Decode the programme instruction, Execute the instruction and to write the result from the ALU to the memory location or to the register or perhaps an output device.
PROGRAMME COUNTER (SEQUENCE CONTROL REGISTER):
This is a set of memory call register that instruction can be read from and written to, more faster than the main memory ( RAM ).
Registers are use for most frequently use data to avoid accessing the RAM each time which is often slow compared to the ALU and the Control Unit.