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COA- Unit -5 Peripheral DeviceS

  A peripheral device, also sometimes called an auxiliary device, is any connected device (internal or external) that provides a computer with additional functionality. There are three types of peripherals: Input peripherals: Allows user input, from the outside world to the computer. Example: Keyboard, Mouse etc. Output peripherals: Allows information output, from the computer to the outside world. Example: Printer, Monitor etc Input-Output peripherals: Allows both input(from outside world to computer) as well as, output(from computer to the outside world). Example: Touch screen etc. 10 Examples of Peripheral Devices Mouse , Keyboard , Webcam , Microphone , Monitor , Speakers , Projector , Printer USB Flash Drive External Hard Drive Input Devices In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance. Examples of input devices ...
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COA-UNIT-3 Control Unit

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  UNIT-3 Control Unit   Instructions Instructions are a set of machine language instructions that a particular processor understands and executes. A computer performs tasks on the basis of the instruction provided. An instruction comprises of groups called fields. These fields include: The Operation code (Opcode) field which specifies the operation to be performed. The Address field which contains the location of the operand, i.e., register or memory location. The Mode field which specifies how the operand will be located. A basic computer has three instruction code formats which are: Memory - reference instruction Register - reference instruction Input-Output instruction Memory - reference instruction In Memory-reference instruction, 12 bits of memory is used to specify an address and one bit to specify the addressing mode 'I'. Register - reference instruction The Register-reference i...
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