Page 60 - Cs_withBlue_J_C11_Flipbook
P. 60

Internally, however, it appears as a 7-bit code, the leftmost bit called the check bit or parity bit is added as shown
              below:

                          Check bit            Zone bits                           Numeric bits
                                            B             A             8            4         2         1
              The following table represents a 6-bit BCD code:

                                       Character       Zone bit      Numeric bit     Octal value
                                           A              11            0001            61
                                           B              11            0010            62
                                           C              11            0011            63
                                           D              11            0100            64
                                           E              11            0101            65
                                           F              11            0110            66
                                           G              11            0111            67
                                           H              11            1000            70
                                           I              11            1001            71
                                           J              10            0001            41
                                           K              10            0010            42
                                           L              10            0011            43
                                           M              10            0100            44
                                           N              10            0101            45
                                           O              10            0110            46
                                           P              10            0111            47
                                           Q              10            1000            50
                                           R              10            1001            51
                                           S              01            0010            22
                                           T              01            0011            23
                                           U              01            0100            24
                                           V              01            0101            25
                                           W              01            0110            26
                                           X              01            0111            27
                                           Y              01            1000            30
                                           Z              01            1001            31
                                           1              00            0001            01
                                           2              00            0010            02
                                           3              00            0011            03
                                           4              00            0100            04
                                           5              00            0101            05
                                           6              00            0110            06
                                           7              00            0111            07
                                           8              00            1000            10
                                           9              00            1001            11
                                           0              00            1010            12
                                           +              11            0000            60
                                           _
                                                          10            0000            40
                                           *              10            1100            54
                                           /              01            0001            21
                                           =              00            1011            13



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