UCS Terminal Emulation Draft

From: Markus Kuhn (Markus.Kuhn@cl.cam.ac.uk)
Date: Sat Nov 21 1998 - 07:43:31 EST


A few questions/suggestions on

  ftp://kermit.columbia.edu/kermit/ucsterminal/ucsterminal.txt

which I am implementing at the moment.

> * E0A6 Extensible UR or LL brace section IBM SS240000
> * E0A7 Extensible LR or UL brace section IBM SS250000

I don't understand why there are not four of these. How can UR and LL be
unified?

> * E0AE Right ceiling corner DEC Tech 03/05
> * E0AF Right floor corner DEC Tech 03/06

What are these good for? Big floor-ceiling operators can already be
constructed using the bracket segments. And why are there only right
versions of these?

> E0EF Box drawing double dash H DGL 03/12 (5)
> (5) Similar to U+2504 but double rather than triple.

What is the difference to U+254c (BOX DRAWINGS LIGHT DOUBLE DASH
HORIZONTAL)? Michael's glyph in

  ftp://kermit.columbia.edu/kermit/ucsterminal/terminal-emulation.pdf

doesn't seem to fit the description here. This character is still a bit
confusing.

> E0D8 H line - Scan 5 DSG 07/01, Wyse ANSI 02/02 (2)

I think, this one should be unified with U+2500. The E0D6-E0DA
characters should also be renamed, as a scan line count is ambiguous and
resolution dependent. Something like

E0D6 BOX DRAWINGS LIGHT HORIZONTAL UPPER ONE SIXTH
E0D7 BOX DRAWINGS LIGHT HORIZONTAL UPPER TWO SIXTH
E0D9 BOX DRAWINGS LIGHT HORIZONTAL LOWER TWO SIXTH
E0DA BOX DRAWINGS LIGHT HORIZONTAL UPPER ONE SIXTH

and together with 2500 we would then have all the required lines.

An implementation of these characters is now available in

  http://www.cl.cam.ac.uk/~mgk25/download/ucs-fonts.tar.gz

in the file 6x13-future.bdf, in which I collect proposed implementations
of post-Unicode 2.1 characters for my 6x13 font. It would be nice if you
could have a look at these characters. [BTW: The 6x13.bdf file is now
complete and will be added to various Linux distributions in a few days.
This is your last chance to send me bug reports and suggestions for this
free Unicode xterm font before wide distribution.]

Markus

-- 
Markus G. Kuhn, Computer Laboratory, University of Cambridge, UK
Email: mkuhn at acm.org,  WWW: <http://www.cl.cam.ac.uk/~mgk25/>



This archive was generated by hypermail 2.1.2 : Tue Jul 10 2001 - 17:20:43 EDT