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249 lines
9.8 KiB
Plaintext
249 lines
9.8 KiB
Plaintext
Copyright (C) 1999, 2001-2018 Free Software Foundation, Inc.
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See the end of the file for copying permissions.
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This file describes what you must or might want to do to termcap entries
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to make terminals work properly and efficiently with Emacs. Information
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on likely problems with specific types of terminals appears at the end
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of the file.
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*** What you want in a terminal ***
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Vital
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1. Easy to compute suitable padding for.
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2. Never ever sends ^S/^Q unless you type them, at least in one mode.
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Nice for speed
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1. Supports insert/delete of multiple lines in one command.
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2. Same for multiple characters, though doing them one by
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one is usually fast enough except on emulators running on
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machines with bitmap screens.
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Nice for usability
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1. Considerably more than 24 lines.
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2. Meta key (shift-like key that controls the 0200 bit
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in every character you type).
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*** New termcap strings ***
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Emacs supports certain termcap strings that are not described in the
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4.2 manual but appear to be standard in system V. The one exception
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is 'cS', which I invented.
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'AL' insert several lines. Takes one parameter, the number of
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lines to be inserted. You specify how to send this parameter
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using a %-construct, just like the cursor positions in the 'cm'
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string.
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'DL' delete several lines. One parameter.
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'IC' insert several characters. One parameter.
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'DC' delete several characters. One parameter.
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'rp' repeat a character. Takes two parameters, the character
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to be repeated and the number of times to repeat it.
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Most likely you will use '%.' for sending the character
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to be repeated. Emacs interprets a padding spec with a *
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as giving the amount of padding per repetition.
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WARNING: Many terminals have a command to repeat the
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*last character output* N times. This means that the character
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will appear N+1 times in a row when the command argument is N.
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However, the 'rp' string's parameter is the total number of
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times wanted, not one less. Therefore, such repeat commands
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may be used in an 'rp' string only if you use Emacs's special
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termcap operator '%a-c\001' to subtract 1 from the repeat count
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before substituting it into the string. It is probably safe
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to use this even though the Unix termcap does not accept it
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because programs other than Emacs probably won't look for 'rp'
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anyway.
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'cs' set scroll region. Takes two parameters, the vertical
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positions of the first line to include in the scroll region
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and the last line to include in the scroll region.
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Both parameters are origin-zero. The effect of this
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should be to cause a following insert-line or delete-line
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not to move lines below the bottom of the scroll region.
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This is not the same convention that Emacs version 16 used.
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That is because I was led astray by unclear documentation
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of the meaning of %i in termcap strings. Since the termcap
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documentation for 'cs' is also unclear, I had to deduce the
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correct parameter conventions from what would make the VT-100's
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'cs' string work properly. From an incorrect assumption about
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%i, I reached an incorrect conclusion about 'cs', but the result
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worked correctly on the VT100 and ANSI terminals. In Emacs
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version 17, both 'cs' and %i work correctly.
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The version 16 convention was to pass, for the second parameter,
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the line number of the first line beyond the end of the
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scroll region.
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'cS' set scroll region. Differs from 'cs' in taking parameters
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differently. There are four parameters:
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1. Total number of lines on the screen.
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2. Number of lines above desired scroll region.
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3. Number of lines below (outside of) desired scroll region.
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4. Total number of lines on the screen, like #1.
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This is because an Ambassador needs the parameters like this.
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'cr', 'do', 'le'
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Emacs will not attempt to use ^M, ^J or ^H for cursor motion
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unless these capabilities are present and say to use those
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characters.
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'km' Says the terminal has a Meta key.
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Defining these strings is important for getting maximum performance
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from your terminal.
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Make sure that the 'ti' string sets all modes needed for editing
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in Emacs. For example, if your terminal has a mode that controls
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wrap at the end of the line, you must decide whether to specify
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the 'am' flag in the termcap entry; whichever you decide, the 'ti'
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string should contain commands to set the mode that way.
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(Emacs also sends the 'vs' string after the 'ti' string.
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You can put the mode-setting commands in either one of them.)
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*** Specific Terminal Types ***
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Watch out for termcap entries for Ann Arbor Ambassadors that
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give too little padding for clear-screen. 7.2 msec per line is right.
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These are the strings whose padding you probably should change:
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:al=1*\E[L:dl=1*\E[M:cd=7.2*\E[J:cl=7.2*\E[H\E[J:
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I have sometimes seen '\E[2J' at the front of the 'ti' string;
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this is a clear-screen, very slow, and it can cause you to get
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Control-s sent by the terminal at startup. I recommend removing
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the '\E[2J' from the 'ti' string.
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The 'ti' or 'vs' strings also usually need stuff added to them, such as
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\E[>33;52;54h\E[>30;37;38;39l
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You might want to add the following to the 'te' or 've' strings:
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\E[>52l\E[>37h
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The following additional capabilities will improve performance:
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:AL=1*\E[%dL:DL=1*\E[%dM:IC=4\E[%d@:DC=4\E[%dP:rp=1*%.\E[%a-c\001%db:
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If you find that the Meta key does not work, make sure that
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:km:
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is present in the termcap entry.
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Watch out for termcap entries for VT100's that fail to specify
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the 'sf' string, or that omit the padding needed for the 'sf' and 'sr'
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strings (2msec per line affected). What you need is
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:sf=2*^J:sr=2*\EM:cs=\E[%i%d;%dr:
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The Concept-100 and Concept-108 have many modes that 'ti' strings
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often fail to initialize. If you have problems on one of these
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terminals, that is probably the place to fix them. These terminals
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can support an 'rp' string.
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Watch out on HP terminals for problems with standout disappearing on
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part of the mode line. These problems are due to the absence of
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:sg#0: which some HP terminals need.
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The vi55 is said to require 'ip=2'.
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The Sun console should have these capabilities for good performance.
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:AL=\E[%dL:DL=\E[%dM:IC=\E[%d@:DC=\E[%dP:
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The vt220 needs to be set to vt220 mode, 7 bit, space parity
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in order to work fully with TERM=vt220.
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If you are using a LAT terminal concentrator, you need to issue these
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commands to turn off flow control:
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set port flow control disable
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define port flow control disable
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On System V, in the terminfo database, various terminals may have
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the 'xt' flag that should not have it. 'xt' should be present only
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for the Teleray 1061 or equivalent terminal.
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In particular, System V for the 386 often has 'xt' for terminal type
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AT386 or AT386-M, which is used for the console. You should delete
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this flag. Here is how:
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You can get a copy of the terminfo "source" for at386 using the
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command: 'infocmp at386 >at386.tic'. Edit the file at386.tic and remove
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the 'xt' flag. Then compile the new entry with: 'tic at386.tic'.
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It is also reported that these terminal types sometimes have the wrong
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reverse-scroll string. It should be \E[T, but sometimes is given as \E[S.
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Here is what watserv1!maytag!focsys!larry recommends for these terminals:
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# This copy of the terminfo description has been fixed.
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# The suggestions came from a number of usenet postings.
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#
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# Intel AT/386 for color card with monochrome display
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#
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AT386-M|at386-m|386AT-M|386at-m|at/386 console,
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am, bw, eo, xon,
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cols#80, lines#25,
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acsc=``a1fxgqh0jYk?lZm@nEooppqDrrsstCu4vAwBx3yyzz{{||}}~~,
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bel=^G, blink=\E[5m, bold=\E[1m, cbt=\E[Z,
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clear=\E[2J\E[H,
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cr=\r, cub=\E[%p1%dD, cub1=\E[D, cud=\E[%p1%dB,
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cud1=\E[B, cuf=\E[%p1%dC, cuf1=\E[C,
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cup=\E[%i%p1%02d;%p2%02dH, cuu=\E[%p1%dA, cuu1=\E[A,
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dch=\E[%p1%dP, dch1=\E[P, dl=\E[%p1%dM, dl1=\E[1M,
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ech=\E[%p1%dX,ed=\E[J, el=\E[K, el1=\E[1K\E[X, flash=^G, home=\E[H,
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hpa=\E[%i%p1%dG, ich=\E[%p1%d@, ich1=\E[1@, il=\E[%p1%dL, il1=\E[1L,
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ind=\E[S, indn=\E[%p1%dS, invis=\E[9m,
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is2=\E[0;10;38m, kbs=\b, kcbt=^], kclr=\E[2J,
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kcub1=\E[D, kcud1=\E[B, kcuf1=\E[C, kcuu1=\E[A,
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kdch1=\E[P, kend=\E[Y, kf1=\EOP, kf10=\EOY, kf11=\EOZ,
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kf12=\EOA, kf2=\EOQ, kf3=\EOR, kf4=\EOS, kf5=\EOT,
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kf6=\EOU, kf7=\EOV, kf8=\EOW, kf9=\EOX, khome=\E[H,
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kich1=\E[@, knp=\E[U, kpp=\E[V, krmir=\E0, rev=\E[7m, ri=\E[T,
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rin=\E[%p1%dT, rmacs=\E[10m, rmso=\E[m, rmul=\E[m,
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sgr=\E[10m\E[0%?%p1%p3%|%t;7%;%?%p2%t;4%;%?%p4%t;5%;%?%p6%t;1%;%?%p9%t;12%;%?%p7%t;9%;m,
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sgr0=\E[0;10m, smacs=\E[12m, smso=\E[7m, smul=\E[4m,
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#
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# AT&T 386 color console
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#
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AT386|at386|386AT|386at|at/386 console,
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colors#8, ncv#3, pairs#64,
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is2=\E[0;10;39m,
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op=\E[0m,
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setb=\E[%?%p1%{0}%=%t40m
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%e%p1%{1}%=%t44m
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%e%p1%{2}%=%t42m
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%e%p1%{3}%=%t46m
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%e%p1%{4}%=%t41m
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%e%p1%{5}%=%t45m
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%e%p1%{6}%=%t43m
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%e%p1%{7}%=%t47m%;,
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setf=\E[%?%p1%{0}%=%t30m
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%e%p1%{1}%=%t34m
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%e%p1%{2}%=%t32m
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%e%p1%{3}%=%t36m
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%e%p1%{4}%=%t31m
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%e%p1%{5}%=%t35m
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%e%p1%{6}%=%t33m
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%e%p1%{6}%=%t33m
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%e%p1%{7}%=%t37m%;,
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use=at386-m,
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#
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# Color console version that supports underline but maps blue
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# foreground color to cyan.
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#
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AT386-UL|at386-ul|386AT-UL|386at-ul|at/386 console,
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is2=\E[0;10;38m,
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use=at386,
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COPYING PERMISSIONS:
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This document is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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