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Article #76

^U versus ^X

#76
From: williams
Date: Tue, 10 Nov 1992 13:13
39 lines
2647 bytes
> From: WVNET::IN%"ldgiltne@wsuhub.uc.twsu.edu" 10-NOV-1992 00:17:59.38
> Subj: Problems with SET GOLD KEY
>
> I have all the Ctrl keys defined that were not
> "reserved" by TPU or VMS.

          ...And a few that *are* reserved by VMS.  See below.

>
> Both Ctrl-X and Ctrl-U acted as gold keys.
> Are these two keys tied together somehow?

          Yes.

          The VMS terminal driver uses ^U as an 'Un-type this line'
          key -- it deletes to the beginning of the line.

          ^X is a little more subtle:  DEC uses ^X for the 'clear
          *all* pending input' key.  If there is input in the
          type-ahead buffer, it is cleared.  If there is nothing in
          the type-ahead buffer, then the terminal driver treats ^X as
          if it were ^U.

          As a matter of fact, when you press ^X, TPU will not see it.
          The terminal driver will pass a ^U to TPU.  For proof, use
          the EVE command SHOW KEY, and press ^X.  You will be told
          that "CTRL/U is defined as blah blah blah".

          All of this is on the assumption that you have a
          more-or-less normal terminal setup.  I suspect that if you
          are running in PASTHRU or PASSALL mode (don't attempt this
          at home :-), the ^X will be passed as is.

          I hope this helps....

                                                -Tom Williams
                                                 Computer Center Manager
                                                 Alderson-Broaddus College
                                                 WILLIAMS@AB.WVNET.EDU
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From: williams@ab.wvnet.edu
Newsgroups: vmsnet.tpu
Subject: ^U versus ^X
Message-ID: <01GQZ9KDAYOIA3CA70@WVNVMS.WVNET.EDU>
Date: 10 Nov 92 13:13:41 GMT
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