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binary coded decimal
<data> (BCD, packed decimal) A number representation where a
number is expressed as a sequence of decimal digits and then
each decimal digit is encoded as a four-bit binary number (a
nibble). E.g. decimal 92 would be encoded as the eight-bit
sequence 1001 0010.
In some cases, the right-most nibble contains the sign
(positive or negative).
It is easier to convert decimal numbers to and from BCD than
binary and, though BCD is often converted to binary for
arithmetic processing, it is possible to build hardware that
operates directly on BCD.
[Do calculators use BCD?]
(2001-01-27)
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Nearby terms:
Bill Joy « binaries « binary « binary coded decimal » Binary Compatibility Standard » binary counter » binary data
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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