Binary Coded Decimal (BCD) and Packed Decimal Format Numbers

YouTube Excerpt: Working directly with numbers in base 2 or binary has some drawbacks for computers. Namely there is a loss of precision when converting fractions between bases. Binary Coded Decimal or BCD for short is a method of encoding decimal numbers within for binary bits or a nibble. Packed Decimal format is a method to manage decimal placement and sign of the value stored. If you have an 8 bit (1 byte) store location can store 2 BCD digits with a range of 0-99. Example: 42 in BCD is: 0100 0010 (a 4 and a 2) Remember that 42 represented in base 2 is 101010.

Working directly with numbers in base 2 or binary has some drawbacks for computers. Namely there is a loss of precision when converting fractions...

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