10.3 ASCII “bang bang”

This charset is available in Recode under the name Bang-Bang.

This code, in use on Cybers at Université de Montréal mainly, served to code a lot of French texts. The original name of this charset is ASCII codé 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 !_