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Difference between Serial ports and Parallel ports Points : difference between serial ports and parallel ports, define ports. compare and contrast: serial ports and parallel ports Ports A ports is a socket at the back of a computer used to plug-in various devices. Personal computers have various types of ports. Internally; there are several ports for connecting disk drives, display controllers and keyboards. Externally, personal computers hive ports for connecting modems, printers, scanner and other peripheral devices. Difference between Serial ports and Parallel ports Serial ports Parallel ports 1. A direct link with micro computer’s bus that facilitates the serial transmission of data. A direct link with microcomputer’s but facilitates the parallel transmission of data. 2. Serial ports are used for connecting cable that transmit bits one after the others. Parallel ports are used for connecting cable that transmit serial of bits simultaneously. 3. Rate of data transfer is slow. R

Purpose of Data Bus, Address Bus and Control Bus Points : purpose of data bus, address bus and control bus, define the term bus in general. what are the purpose of data bus, address bus and control bus Buses A processor communicates with Input/output circuit and memory by using signals. These signals travel along a set of wires or connections called bus that connect the different components together. There are three types of signals: address, control and data; like wise there are three types of buses: Address bus, Control bus and Data bus. There are local buses that connect elements within the CPU and buses, which connect the computer to external memory and peripherals. The bus width determine the speed of data transmission. Simply, bus is a set of wires that is used as a communication path. Address flat A collection of wires connecting the CPU with main memory that is used to identify particular locations (address) in main memory where data is stored. The number of bits in t

Major Functions of Arithmetic Logical Unit and Control Unit Points : major functions of arithmetic logical unit and control unit, define the terms with their major functions, arithmetic logical unit, control unit Arithmetic Logical Unit This is where arithmetic operations such as addition, subtraction, division and multiplication are performed. This is where logical operations are also done such as comparison between two pieces of data. The ALU performs the basic functions on data received from the primary storage based on instruction from the control unit. The ALU Performs Arithmetic und Logical Operations The ALU includes a group of registers *_ high-speed volatile or temporary memory locations built directly into the CPU that are used to held the data currently being processed. For example, the control unit might load two numbers from memory into the registers in the ALU. Then it might tell the ALU to divide the two numbers (an arithmetic operation) or to compare the two numbers