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This charset is available in recode under the name bangbang.
This is the local code in use on Cybers at Universite de Montreal, which grave and serious people there prefer to name ASCII code display. This code is also known as Bang-bang. It is based on a six bits character set in which capitals, French diacritics and a few others are coded using an ! escape followed by a single character, and control characters using a double ! escape followed by a single character.
The routines given here presume that the six bits code is already expressed in ASCII by the communication channel, with embedded ASCII ! escapes.
Here is a table showing which characters are being used to encode each ASCII character.
000 !!@ 020 !!P 040 060 0 100 @ 120 !P 140 !@ 160 P 001 !!A 021 !!Q 041 !" 061 1 101 !A 121 !Q 141 A 161 Q 002 !!B 022 !!R 042 " 062 2 102 !B 122 !R 142 B 162 R 003 !!C 023 !!S 043 # 063 3 103 !C 123 !S 143 C 163 S 004 !!D 024 !!T 044 $ 064 4 104 !D 124 !T 144 D 164 T 005 !!E 025 !!U 045 % 065 5 105 !E 125 !U 145 E 165 U 006 !!F 026 !!V 046 & 066 6 106 !F 126 !V 146 F 166 V 007 !!G 027 !!W 047 ' 067 7 107 !G 127 !W 147 G 167 W 010 !!H 030 !!X 050 ( 070 8 110 !H 130 !X 150 H 170 X 011 !!I 031 !!Y 051 ) 071 9 111 !I 131 !Y 151 I 171 Y 012 !!J 032 !!Z 052 * 072 : 112 !J 132 !Z 152 J 172 Z 013 !!K 033 !![ 053 + 073 ; 113 !K 133 [ 153 K 173 ![ 014 !!L 034 !!\ 054 , 074 < 114 !L 134 \ 154 L 174 !\ 015 !!M 035 !!] 055 - 075 = 115 !M 135 ] 155 M 175 !] 016 !!N 036 !!^ 056 . 076 > 116 !N 136 ^ 156 N 176 !^ 017 !!O 037 !!_ 057 / 077 ? 117 !O 137 _ 157 O 177 !_
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