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Diffstat (limited to 'doc/rfc/rfc747.txt')
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diff --git a/doc/rfc/rfc747.txt b/doc/rfc/rfc747.txt new file mode 100644 index 0000000..ebf3474 --- /dev/null +++ b/doc/rfc/rfc747.txt @@ -0,0 +1,59 @@ + +NWG/RFC# 747 MRC 21-MAR-78 44015 +Recent Extensions to the SUPDUP Protocol + + + +Network Working Group Mark Crispin +Request for Comments 747 SU-AI +NIC 44015 21 March 1978 + +Updates: RFC 734. See also RFC 746. + + Recent Extensions to the SUPDUP Protocol + +Recently, some extensions have been made to the SUPDUP protocol. RFC +746, by Richard Stallman, documented the SUPDUP graphics extension. +In addition, a TTYOPT bit has been added and two more variables have +been added to the initial negotiation. This RFC describes the changes +from RFC 734, but excludes the detailed information in RFC 746. +These extensions are upwards and downwards compatable, and are +completely optional. For most SUPDUP user and server programs, +RFC 734 remains an adequate description of the protocol. +However, it is suggested that if the console's line speed is +known, the user SUPDUP should be modified to send the new ISPEED and +OSPEED variables (sending 0 for SMARTS if the graphics extension is +not to be used) so the server can handle buffering for the terminal +better. + +Since these changes are compatable and optional, and since the SUPDUP +protocol is being actively worked on at the present time, I have elected +to issue this update RFC rather than an updated version of RFC +734. An updated 734 will be issued when the protocol stabilizes again. + +Three new variables have been added to the initial negotiation. In +order, they are SMARTS, ISPEED, and OSPEED. Consequently, the count +should now be -10,,0, or, in octal, 777770000000. + +The SMARTS variable specifies what "smarts" (in general, what graphics +capabilities) the terminal has. Like the TTYOPT variable, a bit being +true implies that the terminal has this option. RFC 746 describes this +variable and the SUPDUP graphics option in complete detail. If +the graphics extension is not to be used, SMARTS should be set to 0. + +The ISPEED and OSPEED variables are respectively the input and output +baud rates of the terminal, if known. For example, a 150./1200. +baud terminal would have an ISPEED of 150. and an OSPEED of 1200. A +speed of zero means the line speed is indeterminate. + +The %TPPRN TTYOPT bit (value 0,,200) has been added. This bit +specifies that the system should swap parenthesis with square brackets +on input. This is often desirable for LISP users who are using a +terminal which has parenthesis as a shift character but not +square brackets. This bit is normally off and servers are not required +to implement it. + + + + + -1-
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