Codes for Decimal Digits
There are even codes for representing decimal digits. These codes use 4-bits for EACH decimal digits; it is NOT the same as converting from decimal to binary.
BCD Code 0 = % 0000 1 = % 0001 2 = % 0010 3 = % 0011 4 = % 0100 5 = % 0101 6 = % 0110 7 = % 0111 8 = % 1000 9 = % 1001
In BCD code, each decimal digit simply represented by its binary equivalent. 96 = % 1001 0110 = $ 96 (BCD code) Advantage: easy to convert Disadvantage: takes more bits to store a number:
255 = % 1111 1111 = $ FF (binary code) 255 = % 0010 0101 0101 = $ 255 (BCD code) takes only 8 bits in binary, takes 12 bits in BCD.