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topic 1 2020(Systems architecture) - Coggle Diagram
topic 1 2020(Systems architecture)
General Purpose computer
this is a computer that is designed to be able to carry out many different tasks.
hardware is the physical components of a computer.
software is the programs that run on a computer.
it consists hardware and software.
CPU
it processes data/instructions and controls the computer system .
input devices:keyboard,mouse and camera.
output devices: monitor,printer and speaker.
CPU components
Cache
used to hold data and instructions that the processor is likely to reuse
Buses
Buses are used to send control signals and data between the processor and other components.
Registers
used by the processor to store small amounts of data that are needed during processing
clock
he clock sends out a regular electrical pulse which synchronizes all the components.
Arithmetic Logic Unit(ALU)
performs calculation and makes logical decisions
Control Unit(CU)
Fetches,decodes, and executes instructions.
Von Neumann architecture
memory address register (MAR) - holds the address of the current instruction that is to be fetched from memory
memory data register (MDR) - holds the contents found at the address held in the MAR)
Program Counter-holds the memory address of the next instruction to be fetched from primary memory
is the design upon which many general purpose computers are based.
accumulator (ACC) – holds the data being processed and the results of processing