PKLAMMER@CUDNVR.DENVER.COLORADO.EDU (Pete Klammer 303/556-3915) (02/07/91)
Since NCSA has not found it in their hearts to fix this, here is a patch.
Problem: NCSA telnet responds to the "what are you?" query (e.g.,
from VMS command 'SET TERM /INQUIRE') with "<ESC>[?6C", which means,
"I am a VT102." Unfortunately, this is not completely true, since
real VT102's support insert/delete-character commands, and NCSA don't.
Symptom: Text editors and other programs that believe NCSA and use
full VT102 functions produce screwed-up screens with NCSA telnet. In
particular, GNU Emacs text type-ins look overtyped when they should be
inserted, and repeated screen-refreshing (CTRL/L) is required to see
what is really going on.
Cure: Change NCSA telnet code to respond "I am a VT100" ("<ESC>[?1c")
or else improve terminal emulator code to support full VT102 functions.
Workaround: Patch TELBIN.EXE to reply with "1" instead of "6".
C> copy telbin.exe *.new (work on a separate copy)
C> debug telbin.new (debug treats .EXE differently)
- rds (we need to look beyond the first 64K segment)
DS 1234 (a 4-digit number is displayed)
: 3234 (add $2000 to this number and type that in)
-s 0 ffff "[?6c" (search for this text)
3234:FA94 (a segment:offset address is displayed)
-e fa96 (add $2 to the offset, where the "6" is)
FA96: 36.31 (type in 31 which is hex for ASCII "1")
-w (write file back out)
-q (congratulations)
C> ren telbin.exe *.org (save the original, in case...)
C> ren telbin.new *.exe (you now have a VT100 NCSA telnet)
--poko "Eesti vabaks/free Estonia!" Pete Klammer (303)556-3915 FAX(303)556-4822
CU-Denver Computing Services, AHEC Box#169 / PKLAMMER@CUDENVER.bitnet
1200 Larimer St, NC2506, Denver CO 80204 / {uucp...}!boulder!pikes!pklammer
P.O. Box 173364, Denver CO 80217-3364 / pklammer@cudnvr.Denver.Colorado.EDU