How do I unpack a packed BCD number?

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How do I unpack a packed BCD number?

Unpacking the BCD number is separating each BCD digit. Eg: 98 can be separated as 09 and 08. So we can say 10011000 [98] is packed and 00001001 [09] & 00001000 [08] are unpacked.

What is used to convert BCD to decimal number?

BCD-to-Decimal Conversion Simply divide the binary number into groups of four digits, starting with the least significant digit and then write the decimal digit represented by each 4-bit group.

Which of the following is unpacked BCD number?

Answer: Unpacked BCD is each number is represented by its own byte. The number 75 in unpacked BCD would be 00000111 and 00000101.

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What do you mean by unpacked and packed BCD number?

In byte-oriented systems (i.e. most modern computers), the term unpacked BCD usually implies a full byte for each digit (often including a sign), whereas packed BCD typically encodes two digits within a single byte by taking advantage of the fact that four bits are enough to represent the range 0 to 9.

What is unpacked decimal?

Is it possible to convert a BCD to decimal?

It is seeking to convert a BCD (Binary coded decimal) value into its decimal equivalent. It’s a little unusual, but far from unheard of. Heck, Z80 chips had instructions to support BCD addition and subtraction. – Jonathan Leffler

How do you convert from decimal to binary?

This is from the micro controller world…. Note that values are rounded in the division. For instance 91 to BCD would be 91/10 * 16 = 144 + 91\%10 = 145. Converted to Binary is 10010001. Usually when someone says they want to convert from decimal to BCD, they’re talking about more than one decimal digit.

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What is the hexadecimal value of 0001 0101bcd?

And in terms of binary representation 0001 0101BCD (decimal 15) should be converted to 1111BCH (hexadecimal F). If no conversion were necessary then you would end up with hexadecimal 15, which might have fooled you, but the input was decimal 15.

Is the lower nibble in BCD or ASCII?

EDIT: Also note KFro’s comment that the lower nibble (= 4 bits) of the binary ASCII representation of numerals is in BCD. This makes conversions BCD <-> ASCII very easy as you just have to add/remove the leading 4 bits: