1 10/23/75 Correspondence 2741's
 2 
 3 Multics now supports Correspondence code 2741 terminals using
 4 the 029 typeball. All 134 baud channels will be capable of running
 5 either an EBCDIC or Correspondence 2741 and two new preaccess
 6 requests have been defined to indicate which type is being used.
 7 
 8 
 9 Preaccess requests: At dialup, the system will print the greeting
10 message in the installation defined code (i.e., EBCDIC or
11 Correspondence). If the user's terminal is the other code type, one
12 of the preaccess requests, 963 or 029, must be issued before the
13 login request. These requests indicate which code set is being used,
14 963 for EBCDIC or 029 for Correspondence. If an incorrect response is
15 received, the system prompts the user in both code sets for one of
16 the preaccess requests.
17 
18 
19 Escape conventions: Since Correspondence code does not contain all 94
20 printing ASCII graphics, some escape conventions have been chosen.
21 The following table lists the ASCII graphic being represented, the
22 input and non-edited output escapes, and the edited output
23 representations. Note that the 2741 escape character is the cent-sign.
24 
25 ASCII graphic     Escape     Edited output
26 less-than         \(         (^H-
27 greater-than      \)         )^H-
28 left-bracket      \l         (^H=
29 right-bracket     \r         )^H=
30 left-brace        \173
31 right-brace       \175
32 
33 exclamation point \:         '^H.
34 tilde             \t         "^H-
35 left accent       \'         '
36 vertical bar      \/         /
37 circumflex        +^H-
38 
39      Note that the circumflex uses the existing Correspondence
40 graphic plus-minus.