DEC Multinational Character Set and Drawing Characters

 //////////////////////////////////////////////////////////////////////////////

Newsgroups: comp.os.vms
Path: cs.utk.edu!darwin.sura.net!howland.reston.ans.net!agate!overload.lbl.gov!
      lll-winken.llnl.gov!unixhub!slacvx.slac.stanford.edu!fairfield
Message-ID: <1994Jan20.181633.1@slacvx.slac.stanford.edu>
Lines: 174
Sender: news@unixhub.SLAC.Stanford.EDU
Organization: Stanford Linear Accelerator Center
References: <19JAN199408105895@vax2.concordia.ca>
Date: Fri, 21 Jan 1994 02:16:33 GMT
From: "Dr. Kenneth H. Fairfield" <fairfield@slacvx.slac.stanford.edu>
Subject: Re: vt100 extended characters

In article <19JAN199408105895@vax2.concordia.ca>, 
			glsa@vax2.concordia.ca (DAN RICHARDSON) writes:
>
> Where can I find a list of the ansi standard codes for vt100(+)
> terminals that permit extended vt100 characters to be 
> transmitted over 7-bit lines?  (for example, the box drawing
> characters).                                                   

        VT100 characters  are  _all_  7-bit  codes.   If  your  terminal
    settings  are  correct, there is nothing to prevent sending any  and
    all characters recognized by a VT100 over  7-bit  connections.   The
    8-bit  Multi-National  Characters  generated and displayed by VT200+
    terminals is another matter...

        The  list  of  line-drawing  characters  (DEC  Special  Graphics
    Character  set)  is  fairly  short: it consists of  the  lower  case
    alphabetic characters.  The key is is that you have to "shift in" or
    "shift out" of the special graphics by sending a CTRL/N (shift  out,
    goes  _to_  graphics  characters)  and  a  CTRL/O (shift in, back to
    _normal_ alphabetic characters) to  the  terminal,  ASCII 14 and 15,
    respectively.   You also need to "prepare" the terminal for shifting
    to the correct character set by sending the following (7-bit  codes)
    to the terminal:

    			<ESC>(B<ESC>)0

    where "<ESC>" is, of course, ASCII 27, hexadecimal 1B.

        Below my signature is a VMS_SHARED file, GRAPHICS.TXT, that when
    TYPE'd on your  terminal  will  show  you the correspondance between
    lower  case  letters and the graphics characters they  produce.   It
    also demonstrates the various video attributes you can use (REVERSE,
    BOLD, etc.) and double-wide  and  double-high-double-wide  text  (if
    your terminal supports the "advanced video" option).

        -Ken
-- 
 Dr. Kenneth H. Fairfield    |   Internet: Fairfield@Slac.Stanford.Edu
 SLAC, P.O.Box 4349, MS 98   |   DECnet:   45537::FAIRFIELD (45537=SLACVX)
 Stanford, CA   94309        |   Voice: (415) 926-2924  FAX: (415) 926-4335
 ----------------------------------------------------------------------------
 These opinions are mine, not SLAC's, Stanford's, nor the DOE's...


$! ------------------ CUT HERE -----------------------
$! (OpenVMS DCL)
$!
$ v='f$verify(f$trnlnm("SHARE_UNPACK_VERIFY"))'
$!
$! This archive created:
$!  Name : GRAPHICS
$!  By   : Ken Fairfield <fairfield@SLACVX.SLAC.STANFORD.EDU>
$!  Date : 20-JAN-1994 18:12:24.21
$!  Using: VMS_SHARE 8.4, (C) 1993 Andy Harper, Kings College London UK
$!
$! Credit is due to these people for their original ideas:
$!    James Gray, Michael Bednarek 
$!
$! TO UNPACK THIS SHARE FILE, CONCATENATE ALL PARTS IN ORDER
$! AND EXECUTE AS A COMMAND PROCEDURE  (  @name  )
$!
$! THE FOLLOWING FILE(S) WILL BE CREATED AFTER UNPACKING:
$!       1. GRAPHICS.TXT;2
$!
$ set="set"
$ set symbol/scope=(nolocal,noglobal)
$ f=f$parse("SHARE_UNPACK_TEMP","SYS$SCRATCH:."+f$getjpi("","PID"))
$ e="write sys$error  ""%UNPACK"", "
$ w="write sys$output ""%UNPACK"", "
$ if .not. f$trnlnm("SHARE_UNPACK_LOG") then $ w = "!"
$ if f$getsyi("CPU") .gt. 127 then $ goto start
$ ve=f$getsyi("version")
$ if ve-f$extract(0,1,ve) .ges. "4.4" then $ goto start
$ e "-E-OLDVER, Must run at least VMS 4.4"
$ v=f$verify(v)
$ exit 44
$unpack: subroutine ! P1=filename, P2=checksum, P3=attributes,P4=size
$ if f$parse(P1) .nes. "" then $ goto dirok
$ dn=f$parse(P1,,,"DIRECTORY")
$ w "-I-CREDIR, Creating directory ''dn'"
$ create/dir 'dn'
$ if $status then $ goto dirok
$ e "-E-CREDIRFAIL, Unable to create ''dn' File skipped"
$ delete 'f'*
$ exit
$dirok:
$ x=f$search(P1)
$ if x .eqs. "" then $ goto file_absent
$ e "-W-EXISTS, File ''P1' exists. Skipped"
$ delete 'f'*
$ exit
$file_absent:
$ w "-I-UNPACK, Unpacking ", P5, " of ", P6, " - ", P1, " - ", P4, " Blocks"
$ n=P1
$ if P3 .nes. "" then $ n=f
$ if .not. f$verify() then $ define/user sys$output nl:
$ EDIT/TPU/NOSEC/NODIS/COM=SYS$INPUT/NOJOURNAL 'f'/OUT='n'
PROCEDURE GetHex(s,p)LOCAL x1,x2;x1:=INDEX(t,SUBSTR(s,p,1))-1;x2:=INDEX(t,
SUBSTR(s,p+1,1))-1;RETURN 16*x1+x2;ENDPROCEDURE;PROCEDURE SkipPartsep LOCAL m;
LOOP m:=MARK(NONE);EXITIF m=END_OF(b);DELETE(m);EXITIF INDEX(ERASE_LINE,
"-+-+-+-+-+-+-+-+")=1;ENDLOOP;ENDPROCEDURE;PROCEDURE ProcessLine LOCAL c,s,l,b,
n,p;c := ERASE_CHARACTER(1);s := ERASE_LINE;IF c = "X" THEN SPLIT_LINE; ENDIF;
MOVE_HORIZONTAL(-1);l := LENGTH(s);p := 1;LOOP EXITIF p > l;c := SUBSTR(s,p,1);
p := p+1;CASE c FROM ' ' TO '`' ['`']: COPY_TEXT(ASCII(GetHex(s,p))); p:=p+2;[
' ']: p:=p+1;[INRANGE,OUTRANGE]: COPY_TEXT(c);ENDCASE;ENDLOOP;ENDPROCEDURE;
PROCEDURE Decode LOCAL m;POSITION(BEGINNING_OF(b));LOOP m:=MARK(NONE);EXITIF m=
END_OF(b);DELETE(m);IF INDEX(CURRENT_LINE,"+-+-+-+-+-+-+-+-")=
1 THEN SkipPartSep;ELSE ProcessLine;MOVE_HORIZONTAL(1);ENDIF;ENDLOOP;
ENDPROCEDURE;SET(FACILITY_NAME,"UNPACK");SET(SUCCESS,OFF);SET(INFORMATIONAL,
OFF);t:="0123456789ABCDEF";f:=GET_INFO(COMMAND_LINE,"file_name");b:=
CREATE_BUFFER(f,f);Decode;WRITE_FILE(b,GET_INFO(COMMAND_LINE,"output_file"));
QUIT;
$ if p3 .eqs. "" then $ goto dl
$ open/write fdl &f
$ write fdl "RECORD"
$ write fdl P3
$ close fdl
$ w "-I-CONVRFM, Converting record format to ", P3
$ convert/fdl=&f &f-1 &P1
$dl: delete 'f'*
$ checksum 'P1'
$ if checksum$checksum .nes. P2 then $ -
  e "-E-CHKSMFAIL, Checksum of ''P1' failed."
$ exit
$ endsubroutine
$start:
$!
$ create 'f'
X`1B(B`1B)0`20abcdefghijklmnopqrstuvwxyz`60_`7E`7B`7D`7C`20`20`20`20`20`20`20
V`20`20`20`20`20`20
X`20`0Eabcdefghijklmnopqrstuvwxyz`60_`7E`7B`7D`7C`0F
X`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20`20
V`20`20`20`20`20`20`20`20`20`20
X`20`1B`5B0mNormal`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`7E`7E`7E`0F`20<esc>`5B0m`20
X`20`1B`5B1mBold`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`0F`20<esc>`5B1m`20
X`20`1B`5B4mUnderline`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`7E`0F`20<esc>`5B4m`20
X`20`1B`5B5mBlink`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`7E`7E`7E`7E`0F`20<esc>`5B5m`20
X`20`1B`5B7mReverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`7E`7E`7E`0F`20<esc>`5B7m`20
X`20`1B`5B1;4mBold,Underline`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`0F`20<esc>`5B1;4m
X`20`1B`5B1;5mBold,Blink`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`7E`0F`20<esc>`5B1;5m
X`20`1B`5B1;7mBold,Reverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`7E`0F`20<esc>`5B1;7m
X`20`1B`5B4;5mUnderline,Blink`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`0F`20<esc>`5B4;5m
X`20`1B`5B4;7mUnderline,Reverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`0F`20<esc>`5B4;7m
X`20`1B`5B5;7mBlink,Reverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`7E`7E`0F`20<esc>`5B5;7m
X`20`1B`5B1;4;5mBold,Underline,Blink`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`0F`20<esc>`5B1;4;5m
X`20`1B`5B1;4;7mBold,Underline,Reverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`0F
V`20<esc>`5B1;4;7m
X`20`1B`5B1;5;7mBold,Blink,Reverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`7E`7E`7E
V`7E`7E`0F`20<esc>`5B1;5;7m
X`20`1B`5B4;5;7mBlink,Underline,Reverse`1B`5Bm`20`0E`7E`7E`7E`7E`7E`7E`7E`0F`20
V<esc>`5B4;5;7m
X`20`1B`5B1;4;5;7mBold;Blink,Underline,Reverse`1B`5Bm`20`0E`7E`7E`0F`20<esc>`5B
V1;4;5;7m
X
X
X
XThis`20is`20Normal`20text.
X
X`1B#6This`20is`20Double`20Wide`20text.
X
X`1B#3This`20is`20Double`20High/Wide`20text.
X`1B#4This`20is`20Double`20High/Wide`20text.
X`1B#5
$ call unpack GRAPHICS.TXT;2 1411998889 "" 3 1 1 
$ v=f$verify(v)
$ exit


 //////////////////////////////////////////////////////////////////////////////

Newsgroups: comp.os.vms
Path: cs.utk.edu!emory!news-feed-2.peachnet.edu!concert!ais.com!bruce
Message-ID: <1994Jan21.201234.6480@ais.com>
References: <19JAN199408105895@vax2.concordia.ca>
            <1994Jan20.181633.1@slacvx.slac.stanford.edu>
Organization: Applied Information Systems, Chapel Hill, NC
Date: 21 Jan 1994 20:12:34 GMT
From: bruce@ais.com (Bruce C. Wright)
Subject: Re: vt100 extended charactersex

In article <1994Jan20.181633.1@slacvx.slac.stanford.edu>,
  fairfield@slacvx.slac.stanford.edu writes:
>
> In article <19JAN199408105895@vax2.concordia.ca>, 
> 			glsa@vax2.concordia.ca (DAN RICHARDSON) writes:
>>
>> Where can I find a list of the ansi standard codes for vt100(+)
>> terminals that permit extended vt100 characters to be 
>> transmitted over 7-bit lines?  (for example, the box drawing
>> characters).                                                   
> 
>         VT100 characters  are  _all_  7-bit  codes.   If  your  terminal
>     settings  are  correct, there is nothing to prevent sending any  and
>     all characters recognized by a VT100 over  7-bit  connections.   The
>     8-bit  Multi-National  Characters  generated and displayed by VT200+
>     terminals is another matter...


Minor point - the DEC Multi-National character set can be displayed
quite well over a 7-bit line by using appropriate combinations of
the SCS escape sequence and the various Shift-In/Shift-Out sequences.

What is not possible (in general) is displaying the Latin-1 character
set or other 96-character character sets over 7-bit lines.  Most VTxxx
terminals will refuse to select those character sets into the left-hand
code page (GL), which is required in order to do this.  In practice
this is not terribly critical since the MCS and Latin-1 share most of
their "interesting" characters, but it could be an annoyance if you
want to get one of the characters that differ between the two sets.

Bruce C. Wright

 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
 //////////////////////////////////////////////////////////////////////////////

Newsgroups: comp.unix.programmer,comp.terminals
Path: cs.utk.edu!gatech!howland.reston.ans.net!pipex!sunic!news.funet.fi
      !news.csc.fi!kronos.fmi.fi!dionysos.fmi.fi!hurtta
Followup-To: comp.terminals
Organization: Finnish Meteorological Institute (FMI)
Lines: 36
Message-ID: <3fdrqo$ca4@kronos.fmi.fi>
References: <snakec.789625204@larry>
NNTP-Posting-Host: dionysos.fmi.fi
In-Reply-To: Article <snakec.789625204@larry> of Ryan Groth
Date: 16 Jan 1995 13:20:24 GMT
From: hurtta@dionysos.fmi.fi (Kari E. Hurtta)
Subject: Re: ASCII CODES > 127 under VT100/ANSI & CURSES

[ Followups to comp.terminals ]

snakec@larry.wyvern.com (Ryan Groth) writes comp.unix.programmer:
|
|I am writing a few application under SCO unix (AT&T System V, POSIX...)
|using curses. I would like to use line drawing characters in the application
|which I am positive my terminal supports. I do not want to use the box()
|function however. If I addstr() with line drawing characters in the string I
|get M's and D's on the screen. Box does draw lines. Is there a way to use
|addstr() and send line characters? I am positive that my application will


These line drawing characters are from different character set:
Usual assignment (with curses and VT100) may be:

Bank G0		US-ASCII		Assigned with ESC ( B
Bank G1		Special Graphics	Assigned with ESC ) 0

Selecting bank G0 for characters 32-127 with SI
Selecting bank G1 for characters 32-127 with SO

ESC is 0x1B or Ctrl-[
SI  is 0x0F or Ctrl-O
SO  is 0x0E or Ctrl-N

As you can see drawing of line characters don't be so simple (VT100
DON'T use characters > 127 -- VT100 don't support them). You can't do
it with addstr() only, because task includes charcter set assigments also.

(If terminal supports 8-bit characters you perhaps can assing Special Graphics
 to bank G1 and select bank G1 for characters 128-255 with ESC ~
 I however don't be sure that this Special Graphics characters are duplicated
 to upper range -- perhaps they are. )

--
- Kari E. Hurtta                             /  Elämä on monimutkaista
  Kari.Hurtta@Fmi.FI			     puh. (90) 1929 658
  {hurtta,root,Postmaster}@dionysos.fmi.fi


 //////////////////////////////////////////////////////////////////////////////


Newsgroups: comp.lang.cobol, comp.terminals, comp.unix.aix, comp.periphs
Date: 5 Sep 1996 14:46:07 -0400
From: Richard Shuford <shuford@*@cs.utk.edu>
Subject: Re: terminfo files for AIX 2.3

In article <322EB2E4.594F@lincsys.com>,
 Jim Egerton <jegerton@lincsys.com> writes:
>
> Anyone have terminfo files (xterm, vt100, aixterm) that work
> with the Microfocus toolbox on AIX?
>
> Using the files shipped with Microfocus V.3.2.37 I have tried
> using an aixterm as well an xterm with TERM set to xterm and
> vt100.  With the aixterm or xterm and TERM=xterm, the video
> didn't work properly (line's were displayed as qqqqqq).


The display of a row of "qqqqqqq..." is a symptom of the client
application wanting to use the DEC Line-Drawing Character Set, which
is built into VT100s, VT320s, and any other DEC-like terminal built
since 1980.  With the proper character set mapped into the "alternate"
character set, and if the terminal (or emulation) properly honors
codeset switching, a horizontal line is displayed, instead of
"qqqqqqqq...".

(By the way, this is *not* the same as DEC's "advanced video option",
or AVO.  AVO on a VT100 gave you 24-line-by-132-column mode and the
full four video attributes: underline, reverse, bold, & blink. Later
DEC terminals had support for this as standard.)


> With an xterm and TERM=vt100, the video is great (appears to use
> the vt100 graphics character set to draw frames), but the
> function keys didn't work.

You don't say what kind of keyboard you are using.  Makes a difference.


> After copying the terminfo files to a local directory,
> pointing COBTERMINFO and TERMINFO at the local directory, and
> running the .src files through tic, the situation improved
> slightly.  The video for the aixterm and xterm with
> TERM=xterm is better, but frames are drawn using +---+
> instead of the vt100 graphics characters.

A reasonable thing to do, if the client cannot be certain that your
xterm emulation supports the line-drawing characters.


> I was able to  modify the kf1 settings in vt100.src so that the function
> keys are recognized, but the frames are drawn the same as
> with the aixterm and xterm with TERM=xterm.
>
> I also pulled the example vt100 file from the Microfocus
> Cobol home page and tried using this with an xterm.  Same
> results--no advanced video.
>
> If anyone has any terminfo files that appear to work in this
> environment, or online documentation for the settings of sgr,
> sgr0, enacs, rmacs, and acsc I'd really appreciate it.


The global master database for terminfo and termcap descriptions
is now maintained by Eric S. Raymond and is available from:

    [OLD: http://www.ccil.org/~esr/ncurses.html]

    2004 current:
    http://www.catb.org/~esr/terminfo/

 ........................................
 Addendum:  the master terminfo/termcap
 files contain a "klone+acs" entry that
 tries to use the line-drawing characters
 from the IBM PC alternate character set.
 This might work with any Intel console.
 ........................................


 //////////////////////////////////////////////////////////////////////////////



Newsgroups: comp.terminals
Path: cs.utk.edu!stc06.ctd.ornl.gov!fnnews.fnal.gov!uwm.edu!news-res.gsl.net
      !news.gsl.net!news.mathworks.com!newsfeed.internetmci.com!demos
      !news.uni-stuttgart.de!uniol!uni-erlangen.de!lrz-muenchen.de
      !news.rz.uni-passau.de!
Message-ID: <32102731.87@fmi.uni-passau.de>
Organization: University of Passau, Germany
To: Mike Ching <oeefcu@mail.pixi.com>
X-Mailer: Mozilla 3.0b5 (X11; I; SunOS 5.5 sun4u)
References: <NEWTNews.839875334.4580.oeefcu@pixiuser.pixi.com>
NNTP-Posting-Host: 132.231.20.18
Date: Tue, 13 Aug 1996 08:56:49 +0200
From: Martin Ramsch <ramsch@fmi.uni-passau.de>
Subject: Re: I want lines, not q's!

Mike Ching wrote:
> 
> I'm trying to write a VT-100/ANSI terminal emulator in QuickBasic, but
> I'm getting a bunch of
> 
>     qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
> 
> where there are supposed to be horizontal lines.  How am I supposed to
> recognize when there are supposed to be lines instead of q's?  I've
> noticed even some commercial programs with the same problem.


I don't know exactly about VT-100/ANSI, but xterm's behaviour should be
quite similiar (BTW, what are the differences?).

What you observe is the switching between charsets:

  Control-N (SO, Shift Out): Switch to Alternate Charater Set:
                             invokes the G1 character set

  Control-O (SI, Shift In):  Switch to Standard Character Set:
                             invokes the G0 character set (the default)

To character sets G0 and G1 actually refer is controlled by
  ESC ( <char> : Designate G0 Character Set
                 ESC ( B   = Unites States (USASCII)
                 ESC ( 0   = DEC Special Character and Line Drawing Set

  ESC ) <char> : Designate G1 Character Set
                 ESC ) B   = Unites States (USASCII)
                 ESC ) 0   = DEC Special Character and Line Drawing Set

I guess as default G0 should refer to USASCII and G1 to the Line Drawing
Set.


So, in a nutshell, you have to pay attention to these code sequences!

See <URL: http://www.uni-passau.de/~ramsch/WWW/ctlseqs.ps > and
    <URL: http://www.uni-passau.de/~ramsch/WWW/xtermcharset.gif >

-- 
Sincerly/Mit freundlichen Gruessen
   Martin Ramsch <m.ramsch@ieee.org>
Inbox/Fax: 02561/91371-6364
<URL: http://www.uni-passau.de/~ramsch/ >


 //////////////////////////////////////////////////////////////////////////////

Newsgroups: comp.os.linux.development,comp.terminals
Followup-To: comp.terminals
Path: cs.utk.edu!cssun.mathcs.emory.edu!emory!swrinde!pipex!sunic
 !sunic.sunet.se!news.funet.fi!news.csc.fi!kronos.fmi.fi!dionysos.fmi.fi!hurtta
Date: 7 Apr 1995 07:21:53 GMT
Organization: Finnish Meteorological Institute (FMI)
Message-ID: <3m2p6h$kll@kronos.fmi.fi>
In-Reply-To: Article <3bjdl0$lfd@nyx10.cs.du.edu> of Colin Plumb
References: <784.2EDBB0B0@purplet.demon.co.uk> <aeb.786191379@news.cwi.nl>
            <3bi0he$c6v@trane.uninett.no> <3bi58q$8fv@kronos.fmi.fi>
            <3bjdl0$lfd@nyx10.cs.du.edu>
From: hurtta@dionysos.fmi.fi (Kari E. Hurtta)
Subject: 8-bit charset in C1-C3 banks
  (Re: DO use ESC [ 11 m (was: Don't use ESC [ 11 m - was: Re: using the V ...)



[ This is comment to very old article from my archive :-) ]

colin@nyx10.cs.du.edu (Colin Plumb) writes in comp.terminals:

|I just went through RFC 1345 and the CCITT Red Book Recommendation T.51.

|It seems that the standard escape sequence looks like:
|CSI P P P ... P I...I F

|Where P are "parameters" taken from the 0x30..0x3F range (0123456789:;<=>?)
|I are magic modifier flags that can totally change the meaning of the escape
|sequence, taken from 0x20..0x2F ( !"#$%&'()*+,-./)
|And F is a final letter from 0x40..0x7E (@A..Z[\]^_`a..z{|}_) which specifies
|what the escape sequence is all about.

|The parameters P are decimal numbers separated by semicolons in the usual
|way.  An all-zero field is synonymous with an empty field.  Trailing empty
|fields and the separating semicolons can be stripped.  Using a colon (:)
|is reserved for future standardizatoin.  If the parameters start with any
|of 0x3C..0x3F (<=>?), it's private-use.

|The top bit is ignored if set, although it's not supposed to be, in all
|the arguments.

|(That is taken from ISO 6429.  It also says that F in the range of 0x70..0x7E
|is not to be standardized, but is for experimental use.)

|This applies to CSI, also known as ESC [.  However, some of the ESC sequences
|described below also seem to use a similar pattern, although the last
|group of final characters isn't reserved and none of the sequences discussed
|here have parameters.

|As I understand it, you have two control sets available, C0 and C1.
|Characters from 0..0x1F are in C0, and 0x80..0x9F are in C1.  In case you
|can't send 8-bit characters, ESC-@ through ESC-_ are synonyms for
|128 through 159.  (ESC-x means x+64, for 64 <= x < 96.)

|You can select a C0 set with ESC ! F, where F is one of the final
|characters discussed above, and a C1 set with ESC " F.


|There are 94-character sets (0x21..0x7E) and 96-character sets (0x20..0x7F).
|You can have 4 of these floating around, G0, G1, G2 and G3.  The 0x20..0x7F
|and 0xA0..0xFF ranges are available to have these sets mapped into them.
|When you see a "0x3F", for example, you have to figure out which set (G0,
|G1, G2 or G3) is mapped into that space, and then figure out which character
|set is in force there.

|It's a bit like the 4 segment registers on the 8086.

|94-character sets are mapped in with ESC ( F, ESC ) F, ESC * F and ESC + F.
|These are the G0..G3 slots, respectively.  There's also an overflow range
|which is used, ESC ( ! F, etc.

|96-character sets can only be mapped to the G1..G3 slots.  That uses
|ESC - F, ESC . F and ESC / F.  The "F" assignments are independent of
|the assignments for the 94-character sets.

|I think the default startup is supposed to be G0 in 0x21..0x7E and G1 in
|0xA0..0xFF, but I'm not finding it documented.

|Anyway, you can then choose the mapping of bytes to graphic character
|sets.  This is done with LS0, LS1, LS2 and LS3 (locking Shift N)
|to place G0..G3 in the 0x20..0x7F range, and LS1R, LS2R and LS3R for
|the 0xA0..0xFF range.  There's also SS2 and SS3 to shift the next character
|from G2 or G3 into the 0x20..0x7F range.

|In the document I have, SS2 ix 0x19 (EM) and SS3 is 0x1D (GS).
|LS0 is 0x0F (SI), and LS1 is 0x0E (SO).  LS2 is ESC n and LS3 is
|ESC o.  LS1R is ESC ~, LS2R is ESC } and LS3R is ESC |.


|There are also multi-byte character sets, using either 94 or 96
|characters, selected with ESC $ F, ESC $ ) F, ESC $ * F and ESC $ + F
|for the 94-character case, and ESC $ - F, ESC $ . F and ESC $ / F for
|the 960-character case.

|You can have "dynamically reconfigurable character sets" (downloadable fonts),
|which are specified by inserting a space (0x20) between the character-set
|specifier and the final character.  (If 63 is not enough, overflow using
|the ! hack is a possibility.)


|Oh, and finally, you can replace everything (all 128 or 256 characters)
|with ESC % F.  What happens after that depends on the new character set,
|which may or may not define ESC to get at the old things.


|Now, what I don't understand is how 8-bit character sets work.  RFC 1345
|specifies rather a lot of them, and generally uses the 96-character escapes
|for them, but there are a few 94-character escapes specified.
|In particular, ESC ( t and ESC ( | specify the NAPLPS and T.101-G2
|character sets, which are 8 bits.

|I could reconcile this if the G sets had room for two banks of characters
|(low and high), and 7-bit sets loaded both identically, while 8-bit
|sets loaded them differently, and the various shift functions fetched
|from the corresponding bank.  But I can't find it referred to anywhere.

Seems that in 94-banks really are only 94-charcters and 96-banks have
only 96 characters. In case on 8-bit characters in banks have characters
161-254 (94-bank) or 160-255 (96-bank). So after what bank is selected
higest bit of char is ignored. That higgest bit affect only selection
of GR/GL. And selection of GR/GL affect is that bank G0-G3. 

But after that caharcter is indexed from bank as (char & 127) -- or this
is my impression from some documents (specially from: 
draft-ohta-text-encoding-01.txt).

Can you comfirm this?

|Anyway, I don't think I've made any suggestions or asked any questions,
|but maybe this information dump will help some other people.
|-- 
|	-Colin

[ CC'ed to colin@nyx10.cs.du.edu ]
--
- Kari E. Hurtta                             /  Elämä on monimutkaista
  Kari.Hurtta@FMI.FI			     puh. (90) 1929 658
  {hurtta,root,Postmaster}@dionysos.FMI.FI

 //////////////////////////////////////////////////////////////////////////////

Newsgroups: comp.terminals
Path: cs.utk.edu!stc06.ctd.ornl.gov!fnnews.fnal.gov!uwm.edu!news.alpha.net
     !news.mathworks.com!transfer.stratus.com!xylogics.com!Xylogics.COM!carlson
Organization: Xylogics Incorporated
Message-ID: <3m39v7$2es@newhub.xylogics.com>
References: <784.2EDBB0B0@purplet.demon.co.uk> <aeb.786191379@news.cwi.nl>
            <3bi0he$c6v@trane.uninett.no> <3bi58q$8fv@kronos.fmi.fi>
            <3bjdl0$lfd@nyx10.cs.du.edu> <3m2p6h$kll@kronos.fmi.fi>
NNTP-Posting-Host: newhub.xylogics.com
Date: 7 Apr 1995 12:08:07 GMT
From: carlson@Xylogics.COM (James Carlson)
Subject: Re: 8-bit charset in C1-C3 banks
  (Re: DO use ESC [ 11 m (was: Don't use ESC [ 11 m - was: Re: using the V ...)


In article <3m2p6h$kll@kronos.fmi.fi>,
              hurtta@dionysos.fmi.fi (Kari E. Hurtta) writes:
|> [...]
|> |You can select a C0 set with ESC ! F, where F is one of the final
|> |characters discussed above, and a C1 set with ESC " F.

Do you have a reference for that?  I've never seen those described or
used.  (I'm not even sure what it would mean to have a "C0 set" ...)


|> |Thereare 94-character sets (0x21..0x7E) and 96-character sets (0x20..0x7F).
|> |You can have 4 of these floating around, G0, G1, G2 and G3.  The 0x20..0x7F
|> |and 0xA0..0xFF ranges are available to have these sets mapped into them.
|> |When you see a "0x3F", for example, you have to figure out which set (G0,
|> |G1, G2 or G3) is mapped into that space,and then figure out which character
|> |set is in force there.

You left out GL and GR.  GL (Graphics Left) is the pointer which maps
the 20-7E characters into one of the Gx sets.  Thus, GL has one of the
values 0, 1, 2 or 3.  GR (Graphics Right) is the pointer for the A0-FF
set.  This is usually restricted to 1, 2 or 3 (not 0).


|> |I think the default startup is supposed to be G0 in 0x21..0x7E and G1 in
|> |0xA0..0xFF, but I'm not finding it documented.

The default (at least for VT-series terminals) is GL=0, GR=2, G0=ascii,
G1=ascii, G2=multinational and G3=multinational.


|> |Anyway, you can then choose the mapping of bytes to graphic character
|> |sets.  This is done with LS0, LS1, LS2 and LS3 (locking Shift N)
|> |to place G0..G3 in the 0x20..0x7F range, and LS1R, LS2R and LS3R for
|> |the 0xA0..0xFF range.  There's also SS2 and SS3 to shift the next character
|> |from G2 or G3 into the 0x20..0x7F range.

Actually, the locking-shift operators just change the GL and GR
pointers.

-- 
James Carlson <carlson@xylogics.com>            Tel:  +1 617 272 8140
Annex Software Support / Xylogics, Inc.               +1 800 225 3317
53 Third Avenue / Burlington MA  01803-4491     Fax:  +1 617 272 2618

 //////////////////////////////////////////////////////////////////////////////


Newsgroups: comp.terminals
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      !newsjunkie.ans.net!newstf01.news.aol.com!newsbf02.news.aol.com!not-for-mail
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References: <3m2p6h$kll@kronos.fmi.fi>
NNTP-Posting-Host: newsbf02.mail.aol.com
Date: 13 Apr 1995 11:07:03 -0400
From: psichel@aol.com (PSichel)
Subject: Re: 8-bit charset in C1-C3 banks (Re: DO use ESC [ 11 m (was: Don't use ESC [ 11 m - was: Re: using the V ...)

In  Message-ID: <3m2p6h$kll@kronos.fmi.fi> you wrote:

>Now, what I don't understand is how 8-bit character sets work.

8-bit character sets that follow the ISO structure (ISO 2022)
are made up of two 7-bit "halves".  For example, ASCII in GL
and ISO Latin-1 Supplemental in GR.  The combined 8-bit set
is called "ISO Latin Alphabet Nr 1" or "ISO Latin-1" for short.
[Ignoring the control sets C0 & C1 for simplicity]

ISO 8859/1 (Latin-1) through ISO 8859/9 define additional
8-bit sets by specifying the supplemental part to be used
in GR along with ASCII in GL.

IBM Code Pages are different in that they have no structure
for designating and invoking (switching) character sets or components.
Each code page defines a fixed application specific repertiore.

The term "code page" refers to the page number on which the
character set is described in IBM's master book of character
encodings.

- Peter

 //////////////////////////////////////////////////////////////////////////////

Newsgroups: comp.terminals
References: <8kc2os$fkm$1@as102.tel.hr>
Organization: @Home Network
Newsgroups: comp.terminals
Message-ID: <GPoa5.58015$lU5.386894@news1.rdc1.nj.home.com>
Date: Mon, 10 Jul 2000 18:43:50 GMT
From: dls2 <dlshearer@home.com>
Subject: Re: Setting keyboard over Esc sequences on VT510/520

"IdrEASY" <IdrEASY@bigfoot.com> wrote:
> Hi!
>
> I need to set Croatian keyboard over esc sequence (SCS=Croatian/Slovenian
> latin).
> Also I know that "ESC(&3" are sequence for Russian cyrilic.
>
> I wrote little program with double loop and generate esc calls, but only
> have success for
> Russian keyboard.
>
> Please, help me.
>
> Bye!

The "(" represents the (94-character) G0 character set.
The ")" represents the (94-character) G1 character set.
The "*" represents the (94-character) G2 character set.
The "+" represents the (94-character) G3 character set.

The "-" represents the (96-character) G1 character set.
The "." represents the (96-character) G2 character set.
The "/" represents the (96-character) G3 character set.

Russian NRCS is "&5", not "&3".
SCS NRCS is "%3".

So you should be using "ESC(%3".


  --  Derrick Shearer

 ..............................................................................

Newsgroups: comp.terminals
References: <8kc2os$fkm$1@as102.tel.hr>
    <GPoa5.58015$lU5.386894@news1.rdc1.nj.home.com> <8kho8g$2lr$1@as102.tel.hr>
    <8khpnp$im8$3@news1.Radix.Net>
Date: Wed, 12 Jul 2000 14:04:44 +0100
Organization: RDEL
Newsgroups: comp.terminals
Message-ID: <396C6CEC.ABE87C5E@rdel.co.uk>
From: Paul Williams <flo@rdel.co.uk>
Subject: Re: Setting keyboard over esc sequences on VT510/520

Thomas Dickey wrote:
>
> IdrEASY <IdrEASY@bigfoot.com> wrote:
> >>
> >> Russian NRCS is "&5", not "&3".
> >> SCS NRCS is "%3".

>
> > Sorry, on my terminal (&4 is Russian, but (%3 does nothing.
>
> what type of terminal is that?
> (I'm assuming vt220)

It says VT510/520 on the subject line, Tom. (Yes, I hate it when vital
information is only mentioned on the subject line!)

 //////////////////////////////////////////////////////////////////////////////