www.delorie.com/gnu/docs/recode/recode_42.html

search

	Buy GNU books!

The recode reference manual

10.1 Control Data's Display Code

This code is not available in recode, but repeated here for reference. This is a 6-bit code used on CDC mainframes.

Octal display code to graphic Octal display code to octal ASCII 00 : 20 P 40 5 60 # 00 072 20 120 40 065 60 043 01 A 21 Q 41 6 61 [ 01 101 21 121 41 066 61 133 02 B 22 R 42 7 62 ] 02 102 22 122 42 067 62 135 03 C 23 S 43 8 63 % 03 103 23 123 43 070 63 045 04 D 24 T 44 9 64 " 04 104 24 124 44 071 64 042 05 E 25 U 45 + 65 _ 05 105 25 125 45 053 65 137 06 F 26 V 46 - 66 ! 06 106 26 126 46 055 66 041 07 G 27 W 47 * 67 & 07 107 27 127 47 052 67 046 10 H 30 X 50 / 70 ' 10 110 30 130 50 057 70 047 11 I 31 Y 51 ( 71 ? 11 111 31 131 51 050 71 077 12 J 32 Z 52 ) 72 < 12 112 32 132 52 051 72 074 13 K 33 0 53 $ 73 > 13 113 33 060 53 044 73 076 14 L 34 1 54 = 74 @ 14 114 34 061 54 075 74 100 15 M 35 2 55 75 \ 15 115 35 062 55 040 75 134 16 N 36 3 56 , 76 ^ 16 116 36 063 56 054 76 136 17 O 37 4 57 . 77 ; 17 117 37 064 57 056 77 073

In older times, : used octal 63, and octal 0 was not a character. The table above shows the ASCII glyph interpretation of codes 60 to 77, yet these 16 codes were once defined differently.

There is no explicit end of line in Display Code, and the Cyber Record Manager introduced many new ways to represent them, the traditional end of lines being reachable by setting RT to `Z'. If 6-bit bytes in a file are sequentially counted from 1, a traditional end of line does exist if bytes 10*n+9 and 10n+10 are both zero for a given n, in which case these two bytes are not to be interpreted as ::. Also, up to 9 immediately preceeding zero bytes, going backward, are to be considered as part of the end of line and not interpreted as :(12).