From:	CSBVAX::CSBVAX::MRGATE::"SMTP::CRVAX.SRI.COM::RELAY-INFO-VAX"  9-MAR-1989 04:19
To:	MRGATE::"ARISIA::EVERHART"
Subj:	DECterm bug


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Date:     Wed, 8 Mar 89 15:00:31 PST
From:     rankin@EQL.Caltech.Edu (Pat Rankin)
Message-Id: <890308145839.208009de@EQL.Caltech.Edu>
Subject:  DECterm bug
To:       info-vax@kl.sri.com

     We installed VMS V5.1 + DECwindows this past weekend and I've
discovered a bug in DECterm (DECwindows VT300 emulation).  Use of the
"clear all tabs" escape sequence causes several other escape sequences
to stop functioning.  The one's I've verified are all those marked
"! VT300 mode only" in the the VT320_Programming_Summary (appendix D
of the VT320 user's pamphlet, EK-VT320-UG-001).  The device attributes
response is CSI+"?63;1;3;4;6;8;9;15;16;29c" both before and after the
tab clear, so it isn't being accidently set to VT100 mode (at least not
completely).

-----
DECterm (DECwindows/VMS 5.1) bug

The escape sequence

    Tabulation clear              TBC       CSI 3 g

disables

    Select active status display  DECSASD   CSI ps $ }
    Select status line type       DECSSDT   CSI ps $ ~
    Insert character              ICH       CSI pn @
    Erase character               ECH       CSI pn X
    Select character attribute    DECSCA    CSI ps " q
    Select erase in display       DECSED    CSI ? ps J
    Select erase in line          DECSEL    CSI ? ps K

They are re-enabled by a hard reset (RIS: ESC c) but not by a soft
reset (DECSTR: CSI ! p).  Selection of VT300 operating level (via
DECSCL: CSI 6 d2 ; d3 " p  [where d2 is 2 or 3]) also re-enables them,
as does a SET TERMINAL/INQUIRE; "reset terminal" from the DECterm
"commands" menu does not.
-----

     I haven't seen the release notes yet but I would be very surprised
to find out that this is a documented restriction :-}.

					Pat Rankin
				    rankin@eql.caltech.edu