This file describes what you must or might want to do to termcap entriesto make terminals work properly and efficiently with Emacs.  Informationon likely problems with specific types of terminals appears at the endof the file.*** What you want in a terminal ***Vital1. Easy to compute suitable padding for.2. Never ever sends ^S/^Q unless you type them, at least in one mode.Nice for speed1. Supports insert/delete of multiple lines in one command.2. Same for multiple characters, though doing them one byone is usually fast enough except on emulators running onmachines with bitmap screens.Nice for usability1. Considerably more than 24 lines.2. Meta key (shift-like key that controls the 0200 bitin every character you type).*** New termcap strings ***Emacs supports certain termcap strings that are not described in the4.2 manual but appear to be standard in system V.  The one exceptionis `cS', which I invented.`AL'    insert several lines.  Takes one parameter, the number of        lines to be inserted.  You specify how to send this parameter	using a %-construct, just like the cursor positions in the `cm'	string.`DL'    delete several lines.  One parameter.`IC'    insert several characters.  One parameter.`DC'    delete several characters.  One parameter.`rp'    repeat a character.  Takes two parameters, the character        to be repeated and the number of times to repeat it.	Most likely you will use `%.' for sending the character	to be repeated.  Emacs interprets a padding spec with a *	as giving the amount of padding per repetition.	WARNING: Many terminals have a command to repeat the	*last character output* N times.  This means that the character	will appear N+1 times in a row when the command argument is N.	However, the `rp' string's parameter is the total number of	times wanted, not one less.  Therefore, such repeat commands	may be used in an `rp' string only if you use Emacs's special	termcap operator `%a-c\001' to subtract 1 from the repeat count	before substituting it into the string.  It is probably safe	to use this even though the Unix termcap does not accept it	because programs other than Emacs probably won't look for `rp'	anyway.	`cs'    set scroll region.  Takes two parameters, the vertical	positions of the first line to include in the scroll region	and the last line to include in the scroll region.	Both parameters are origin-zero.  The effect of this	should be to cause a following insert-line or delete-line	not to move lines below the bottom of the scroll region.	This is not the same convention that Emacs version 16 used.	That is because I was led astray by unclear documentation	of the meaning of %i in termcap strings.  Since the termcap	documentation for `cs' is also unclear, I had to deduce the	correct parameter conventions from what would make the VT-100's	`cs' string work properly.  From an incorrect assumption about	%i, I reached an incorrect conclusion about `cs', but the result	worked correctly on the VT100 and ANSII terminals.  In Emacs	version 17, both `cs' and %i work correctly.	The version 16 convention was to pass, for the second parameter,	the line number of the first line beyond the end of the	scroll region.`cS'    set scroll region.  Differs from `cs' in taking parameters	differently.  There are four parameters:	1. Total number of lines on the screen.	2. Number of lines above desired scroll region.	3. Number of lines below (outside of) desired scroll region.	4. Total number of lines on the screen, like #1.	This is because an Ambassador needs the parameters like this.`cr', `do', `le'	Emacs will not attempt to use ^M, ^J or ^H for cursor motion	unless these capabilities are present and say to use those	characters.`km'    Says the terminal has a Meta key.Defining these strings is important for getting maximum performancefrom your terminal.Make sure that the `ti' string sets all modes needed for editingin Emacs.  For example, if your terminal has a mode that controlswrap at the end of the line, you must decide whether to specifythe `am' flag in the termcap entry; whichever you decide, the `ti'string should contain commands to set the mode that way.(Emacs also sends the `vs' string after the `ti' string.You can put the mode-setting commands in either one of them.)*** Specific Terminal Types ***Watch out for termcap entries for Ann Arbor Ambassadors thatgive too little padding for clear-screen.  7.2 msec per line is right.These are the strings whose padding you probably should change:    :al=1*\E[L:dl=1*\E[M:cd=7.2*\E[J:cl=7.2*\E[H\E[J:I have sometimes seen `\E[2J' at the front of the `ti' string;this is a clear-screen, very slow, and it can cause you to getControl-s sent by the terminal at startup.  I recommend removingthe `\E[2J' from the `ti' string.The `ti' or `vs' strings also usually need stuff added to them, such as    \E[>33;52;54h\E[>30;37;38;39lYou might want to add the following to the `te' or `ve' strings:    \E[>52l\E[>37hThe following additional capabilities will improve performance:    :AL=1*\E[%dL:DL=1*\E[%dM:IC=4\E[%d@:DC=4\E[%dP:rp=1*%.\E[%a-c\001%db:If you find that the Meta key does not work, make sure that    :km:is present in the termcap entry.Watch out for termcap entries for VT100's that fail to specifythe `sf' string, or that omit the padding needed for the `sf' and `sr'strings (2msec per line affected).  What you need is    :sf=2*^J:sr=2*\EM:cs=\E[%i%d;%dr:The Concept-100 and Concept-108 have many modes that `ti' stringsoften fail to initialize.  If you have problems on one of theseterminals, that is probably the place to fix them.  These terminalscan support an `rp' string.Watch out on HP terminals for problems with standout disappearing onpart of the mode line.  These problems are due to the absence of:sg#0: which some HP terminals need.The vi55 is said to require `ip=2'.The Sun console should have these capabilities for good performance.	   :AL=\E[%dL:DL=\E[%dM:IC=\E[%d@:DC=\E[%dP:The vt220 needs to be set to vt220 mode, 7 bit, space parityin order to work fully with TERM=vt220.If you are using a LAT terminal concentrator, you need to issue thesecommands to turn off flow control:    set port flow control disable    define port flow control disableOn System V, in the terminfo database, various terminals may havethe `xt' flag that should not have it.  `xt' should be present onlyfor the Teleray 1061 or equivalent terminal.In particular, System V for the 386 often has `xt' for terminal typeAT386 or AT386-M, which is used for the console.  You should deletethis flag.  Here is how:You can get a copy of the terminfo "source" for at386 using thecommand: `infocmp at386 >at386.tic'.  Edit the file at386.tic and removethe `xt' flag.  Then compile the new entry with: `tic at386.tic'.It is also reported that these terminal types sometimes have the wrongreverse-scroll string.  It should be \E[T, but sometimes is given as \E[S.Here is what watserv1!maytag!focsys!larry recommends for these terminals:# This copy of the terminfo description has been fixed.# The suggestions came from a number of usenet postings.## Intel AT/386 for color card with monochrome display#AT386-M|at386-m|386AT-M|386at-m|at/386 console,	am, bw, eo, xon,	cols#80, lines#25,	acsc=``a1fxgqh0jYk?lZm@nEooppqDrrsstCu4vAwBx3yyzz{{||}}~~,	bel=^G, blink=\E[5m, bold=\E[1m, cbt=\E[Z,	clear=\E[2J\E[H,	cr=\r, cub=\E[%p1%dD, cub1=\E[D, cud=\E[%p1%dB,	cud1=\E[B, cuf=\E[%p1%dC, cuf1=\E[C,	cup=\E[%i%p1%02d;%p2%02dH, cuu=\E[%p1%dA, cuu1=\E[A,	dch=\E[%p1%dP, dch1=\E[P, dl=\E[%p1%dM, dl1=\E[1M,	ech=\E[%p1%dX,ed=\E[J, el=\E[K, el1=\E[1K\E[X, flash=^G, home=\E[H,	hpa=\E[%i%p1%dG, ich=\E[%p1%d@, ich1=\E[1@, il=\E[%p1%dL, il1=\E[1L,	ind=\E[S, indn=\E[%p1%dS, invis=\E[9m,	is2=\E[0;10;38m, kbs=\b, kcbt=^], kclr=\E[2J,	kcub1=\E[D, kcud1=\E[B, kcuf1=\E[C, kcuu1=\E[A,	kdch1=\E[P, kend=\E[Y, kf1=\EOP, kf10=\EOY, kf11=\EOZ,	kf12=\EOA, kf2=\EOQ, kf3=\EOR, kf4=\EOS, kf5=\EOT,	kf6=\EOU, kf7=\EOV, kf8=\EOW, kf9=\EOX, khome=\E[H,	kich1=\E[@, knp=\E[U, kpp=\E[V, krmir=\E0, rev=\E[7m, ri=\E[T,	rin=\E[%p1%dT, rmacs=\E[10m, rmso=\E[m, rmul=\E[m,	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,	sgr0=\E[0;10m, smacs=\E[12m, smso=\E[7m, smul=\E[4m,## AT&T 386 color console #AT386|at386|386AT|386at|at/386 console,	colors#8, ncv#3, pairs#64,	is2=\E[0;10;39m,	op=\E[0m, 	setb=\E[%?%p1%{0}%=%t40m                %e%p1%{1}%=%t44m                %e%p1%{2}%=%t42m                %e%p1%{3}%=%t46m                %e%p1%{4}%=%t41m                %e%p1%{5}%=%t45m                %e%p1%{6}%=%t43m                %e%p1%{7}%=%t47m%;,	setf=\E[%?%p1%{0}%=%t30m                %e%p1%{1}%=%t34m                %e%p1%{2}%=%t32m                %e%p1%{3}%=%t36m                %e%p1%{4}%=%t31m                %e%p1%{5}%=%t35m                %e%p1%{6}%=%t33m                %e%p1%{6}%=%t33m                %e%p1%{7}%=%t37m%;,	use=at386-m,## Color console version that supports underline but maps blue# foreground color to cyan.#AT386-UL|at386-ul|386AT-UL|386at-ul|at/386 console,	is2=\E[0;10;38m,	use=at386,