CHAPTER 2 ( COMPUTER HARDWARE COMPONENTS )
In previous post I write about the information technology but now I will write about computer hardware components. So, what is system unit? System unit is a case that contains electronic components of the computer used to process data. There are some important major components in system unit such as processor, memory, adapter cards, ports, drive bays and power supply. The main circuit board in system unit is called as motherboard. Central Processing Unit (CPU) functions to connect data into information. It is a must to have Arithmetic/Logic Unit (ALU) in every computer to perform arithmetic operations and logical operations such as addition, subtraction, evaluates condition and make comparisons. There are four operation of the CPU make up a machine cycle. Step 1 is Fetch : obtain program instruction and data from memory. Step 2 is Decode : translate instruction into commands. Step 3 is Execute : carry out command. Step 4 is Store : write result to memory. Computer have two types of storage which is Primary and Secondary. Ports connects external devices to system unit meanwhile connectors joins cable to peripheral. What is a bus? Bus is a channel that allows devices inside computer to communicate with each other. Lastly, bay is an open area inside system unit used to install addition equipment and typically hold disk drives.
APPLIED SCIENCE'S STUDENT LIFE 