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    REGISTER

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    Nida Khan
    Registers are a type of computer memory that can quickly store and transfer data and instructions for the CPU. Common registers include the data register for holding memory operands, the address register for storing memory addresses, the accumulator for processing data, and the instruction register for holding instructions. The program counter register stores the address of the next instruction to be executed.

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    REGISTER

    Uploaded by

    Nida Khan
    27 views2 pages
    Registers are a type of computer memory that can quickly store and transfer data and instructions for the CPU. Common registers include the data register for holding memory operands, the address register for storing memory addresses, the accumulator for processing data, and the instruction register for holding instructions. The program counter register stores the address of the next instruction to be executed.

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    Registers are a type of computer memory that can quickly store and transfer data and instructions for the CPU. Common registers include the data register for holding memory operands, the address register for storing memory addresses, the accumulator for processing data, and the instruction register for holding instructions. The program counter register stores the address of the next instruction to be executed.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    27 views2 pages

    REGISTER

    Uploaded by

    Nida Khan
    Registers are a type of computer memory that can quickly store and transfer data and instructions for the CPU. Common registers include the data register for holding memory operands, the address register for storing memory addresses, the accumulator for processing data, and the instruction register for holding instructions. The program counter register stores the address of the next instruction to be executed.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 2

    Registers are a type of computer memory used to quickly accept, store, and transfer

    data and instructions that are being used immediately by the CPU. The registers used by
    the CPU are often termed as Processor registers.

    A processor register may hold an instruction, a storage address, or any data (such as bit
    sequence or individual characters).

    The computer needs processor registers for manipulating data and a register for holding
    a memory address. The register holding the memory location is used to calculate the
    address of the next instruction after the execution of the current instruction is
    completed.

    Following is the list of some of the most common registers used in a basic
    computer:

    Register Symbol Number of Function


    bits

    Data register DR 16 Holds memory operand

    Address register AR 12 Holds address for the memory

    Accumulator AC 16 Processor register

    Instruction IR 16 Holds instruction code


    register

    Program counter PC 12 Holds address of the


    instruction

    Temporary TR 16 Holds temporary data


    register

    Input register INPR 8 Carries input character

    Output register OUTR 8 Carries output character

    The following image shows the register and memory configuration for a basic computer.
    o The Memory unit has a capacity of 4096 words, and each word contains 16 bits.
    o The Data Register (DR) contains 16 bits which hold the operand read from the
    memory location.
    o The Memory Address Register (MAR) contains 12 bits which hold the address for
    the memory location.
    o The Program Counter (PC) also contains 12 bits which hold the address of the
    next instruction to be read from memory after the current instruction is executed.
    o The Accumulator (AC) register is a general purpose processing register.
    o The instruction read from memory is placed in the Instruction register (IR).
    o The Temporary Register (TR) is used for holding the temporary data during the
    processing.
    o The Input Registers (IR) holds the input characters given by the user.
    o The Output Registers (OR) holds the output after processing the input data.

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