[comp.emacs] DEC terminals, META KEY?

bennett@uahtitan.ai.mit.edu (Mark Bennett) (03/05/91)

Hi,

	Some recent talk in the user group has brought to mind my
favorite unanswered GNU emacs question: "can the COMPOSE CHARACTER
found on many DEC terminals be made into a META key?"

	Specifically, I am using a VT240 (no - I was not the one who
decided to buy it - I inherited it).

	Even a definitive and authoritative "NO" would put my mind at
ease. 

	Please email to the address below,(however I do faithfully
read this newsgroup). Thanks.

Mark J. Bennett
Center for Microgravity and Materials Research
The University of Alabama in Huntsville
Huntsville, AL 35899
(205)895-6889
bennett@uahtitan.uah.edu   (129.66.23.6)

eichin@ATHENA.MIT.EDU (Mark W. Eichin) (03/08/91)

>>	Some recent talk in the user group has brought to mind my
>>favorite unanswered GNU emacs question: "can the COMPOSE CHARACTER
>>found on many DEC terminals be made into a META key?"
>>	Specifically, I am using a VT240 (no - I was not the one who
>>decided to buy it - I inherited it).
	I once knew someone who worked on the microcode for the vt200
series (we were interested in doing exactly this, back in emacs 17.63
or so. Yes, that's a long time :-) The answer was "only if you burn
new ROMs" and that wasn't a likely option... the current "function" of
the compose key is to generate european (and other?) characters, one
example I think was c with a cedilla beneath it, you'd just type
"<Compose> <c> <,>" and get the right character (something above
128.) 
	Note that this behavior was specific to the vt200 series; the
LK201 keyboard itself is also used for the microvax, vs2000, vs3100,
ds3100, etc workstations, and all of them support Compose as Meta (at
least running X11.)
	I don't recall any technical reason that DEC couldn't produce
ROMs to operate in Meta mode, but as far as I know they've never done
so, or at least not marketed them (I've got some friends at DEC that
I'm sure would have them if they existed.)
				_Mark_ <eichin@athena.mit.edu>
				MIT Student Information Processing Board
				Watchmaker Computing <eichin@watch.com>