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    BCD To Binary

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    faisal
    1) BCD (Binary Coded Decimal) represents each decimal digit in a number as a 4-bit binary number. For example, 1895 in BCD would be 0001 1000 1001 0101. 2) To convert a BCD number back to decimal, each set of 4 bits is multiplied by successive powers of 10 and summed. 3) To encode 67 in BCD: isolate the ones and tens digits (6 and 7), shift the tens digit to the ones place by moving its bits right, multiply the tens digit by 10, and add the digits.

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    BCD To Binary

    Uploaded by

    faisal
    47 views1 page
    1) BCD (Binary Coded Decimal) represents each decimal digit in a number as a 4-bit binary number. For example, 1895 in BCD would be 0001 1000 1001 0101. 2) To convert a BCD number back to decimal, each set of 4 bits is multiplied by successive powers of 10 and summed. 3) To encode 67 in BCD: isolate the ones and tens digits (6 and 7), shift the tens digit to the ones place by moving its bits right, multiply the tens digit by 10, and add the digits.

    Original Description:

    a 8085 program

    Original Title

    Bcd to Binary

    Copyright

    © © All Rights Reserved

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    1) BCD (Binary Coded Decimal) represents each decimal digit in a number as a 4-bit binary number. For example, 1895 in BCD would be 0001 1000 1001 0101. 2) To convert a BCD number back to decimal, each set of 4 bits is multiplied by successive powers of 10 and summed. 3) To encode 67 in BCD: isolate the ones and tens digits (6 and 7), shift the tens digit to the ones place by moving its bits right, multiply the tens digit by 10, and add the digits.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    47 views1 page

    BCD To Binary

    Uploaded by

    faisal
    1) BCD (Binary Coded Decimal) represents each decimal digit in a number as a 4-bit binary number. For example, 1895 in BCD would be 0001 1000 1001 0101. 2) To convert a BCD number back to decimal, each set of 4 bits is multiplied by successive powers of 10 and summed. 3) To encode 67 in BCD: isolate the ones and tens digits (6 and 7), shift the tens digit to the ones place by moving its bits right, multiply the tens digit by 10, and add the digits.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    bcd no is one in which each digit in the no is encoded in its 4 digit binary form

    for example
    1895 in bcd is 0001 1000 1001 0101
    from this if we wish to convert back to 1895 multiply each set of 4 binary numbers(decoded in their
    decimal form) by successive powers powers of 10
    so we have 1x103+8x102+9x10+5=1895
    if we have 67 in bcd mask 6 and store 7 in a register
    then mask 7 and move bits of 6 to the right .then multiply them with 10 then add 7

    (2200H) = 67H
    (2300H) = 6 x OAH + 7 = 3CH + 7 = 43H
    LDA 2200H
    MOV B,A
    ANI 0F
    MOV C,A
    MOV A,B
    ANI F0
    RRC//used to move all bits in the acc to right by one position
    RRC//using them 4 times moves the bits from higher nibble to lower nibble entirely
    RRC
    RRC
    MOV B,A
    MVI D 0A
    LOOP:ADD B
    DCR D
    JNZ LOOP
    ADD C
    STA 2100
    HLT

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