[Info-vax] Last Call for (New) DEC VT Terminals

[Johnny Billquist]

On 2015-06-28 14:11, "VAXman- "@SendSpamHere.ORG wrote:
> In article <mmnbmi$tv8$1 at dont-email.me>, Simon Clubley <clubley at remove_me.eisner.decus.org-Earth.UFP> writes:
>> On 2015-06-27, Jan-Erik Soderholm <jan-erik.soderholm at telia.com> wrote:
>>> Scott Dorsey skrev den 2015-06-27 20:00:
>>>
>>>>
>>>> How important is good emulation to you?  Is emulating the vt100 line 25
>>>> bug important?  For me, it's not.  For others it might be.
>>>> --scott
>>>>
>>
>> I'm only interested in emulating the published specifications (unless
>> DEC used undocumented VT bugs when writing it's software).
>
> Where did you find published *specifications*?
>
> The problem I've found with most all of the emulations is that they perform
> the functions WRT the documented escape sequences but often do not perform
> these functions correctly when combined with other functions and or cursor
> positioning.  This is exhaustively tested in the first test suites of the
> VTTEST utility.
>
> FWIW, because it was brought up by Hoff, xterm can perform reasonably well
> as a VT emulator but it requires the proper selection of build "switches"
> to get that.  I have two "xterms" on my Linux systems.  The xterm that is
> usually the defacto build when installing Linux and one I built myself.
> The defacto xterm is lacking MANY VT features.  My build incorporates the
> options to add things like DECELR and DECSLE (which are also available if
> one is using DECterm).  I still find issues with the VT4xx/VT5xx sequences
> to do rectangular functions with xterm.

Last I looked, xterm do not claim to implement anything beyond the VT200 
series, so I'm not surprised if you have problems with VT400 and VT500 
extensions. :-)

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
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