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Seqed: Telnet 2.5 incompatibilities

Alex Whittaker alex at dapsun.lif.icnet.uk
Mon Nov 7 09:50:57 EST 1994


  We are offering the GCG 8.0 release on our Digital AXP (Alpha) system
 running OSF/1 and are experiencing some difficulties with the Seqed/lineup
 software run over a Mac Telnet version 2.5 terminal. The problem is
 relates to the arrow keys which the mapping for which is changed from ^[[A
 ^[[B ^[[C and ^[[D to  ^[OA ^[OB ^[OC and ^[OD. This is not interpreted
 correctly, and causes the editor to discard the escape O and print a
 capital A B C or D to the screen. As seqed is fairly essential to the
 running of a reasonable service, and most users connect through telnet 2.5
 we are very concerned. I voiced these concerns to GCG and had the
 following response:

>
>We are familiar with this problem.  The best way to solve it is to upgrade to
>a
>newer version of NCSA Telnet such as version 2.6.
>
>One thing that you can try is:
>
>Edit Config.tel (on the MAC)
>termtype="vt200".
>
>Then log on to the unix system.   For sun set term=vt200 for
>irix set term=vt220.  I'm not sure which to try on OSF.  This does not work on
>Ultrix, and since OSF is also from DEC it may not work their either.  (but
>you can take the sun terminfo entry for vt200 and compile it on the ultrix
>machine and the arrow keys will work)
>
..
>
>We never tracked down the exact source of the problem, and no longer have
>version 2.5 for testing.
>

  Although I appreciate that it is difficult to cater for differences in
 other peoples software, upgrading telnet accross arround 400 macs is not a
 short term solution. The alternative suggested modification to the
 config.tel file has the effect of turning off the arrow keys completely.

  Has anyone else been able to resolve this issue, could they share it with
 us. If not, can anyone suggest an alternative sequence editor in the
 public domain, compatible with our system.


  Regards,


  Alex Whittaker                         ______  \||/_
                                        |      |  oo \   "All I know
  Biomedical Informatics Unit           |      |   L_     is that I know
  Imperial Cancer Research Fund         |______|    \/    nothing"
  London                                ________    |
                                       [========]  /
  alex at bison.lif.icnet.uk                     ---OOO-
                                             |ooooooo|
--
  Alex Whittaker                         ______  \||/_
                                        |      |  oo \   "All I know
  Biomedical Informatics Unit           |      |   L_     is that I know
  Imperial Cancer Research Fund         |______|    \/    nothing"
  London                                ________    |
                                       [========]  /
  alex at bison.lif.icnet.uk                     ---OOO-
                                             |ooooooo|



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