Path: utzoo!dciem!trigraph!john
From: john@trigraph.UUCP (John Chew)
Newsgroups: comp.terminals
Subject: Re: Mysterious VT100 behaviors
Message-ID: <401@trigraph.UUCP>
Date: 2 Sep 88 14:33:21 GMT
Article-I.D.: trigraph.401
References: <13801@agate.BERKELEY.EDU> <8411@smoke.ARPA>
Reply-To: poslfit@gpu.utcs.toronto.edu (John Chew)
Organization: Trigraph Inc., Toronto, Canada
Lines: 24

In article <8411@smoke.ARPA> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes:
)In article <13801@agate.BERKELEY.EDU> koonce@math.berkeley.edu writes:
)-When testing out a vt100 emulator program, a friend of mine discovered
)-that EVE running under VMS expects it to interpret  ^Z [ ... q as an
)-LED command.  This is undocumented, and runs contrary to the documentation
)-I have.
)
)I don't know what you mean by "undocumented".  It is described on
)page 48 of my copy of the VT100 User Guide.

Hmm.  Not in *my* copy of the VT100 User Guide.  It does mention the 
"ESC [ ... q" escape sequence which turns on any of the four status
LEDs or turns them all off, with parameter values of 1, 2, 3, 4 or 0.
But on VT100s and most clones, ^Z just prints a blot on the screen.

Every decent VT100 clone I have seen supports at least one status LED
and usually all four.  

John Chew
-- 
john j. chew, iii  poslfit@utorgpu.bitnet
    trigraph, inc. poslfit@gpu.utcs.toronto.edu
  toronto, canada  {uunet!mnetor!utzoo,utgpu,utcsri}!trigraph!john
  [it is my opinion that these are solely my opinions.]