NTERM(5) — Silicon Graphics
NAME
nterm − terminal driving tables for nroff
DESCRIPTION
nroff(1) uses driving table to customize its output for various types of output devices, such as printing terminals, special word processing terminals (such as Diablo, Qume, or NEC Spinwriter mechanisms), or special output filter programs. These driving tables are written as ASCII files, and are installed in /usr/lib/nterm/tab.name, where name is the name for that terminal types as given in term(5).
The first line of a driving table should contain the name of the terminal: simply a string with no embedded white space. "White space" means any combination of spaces, tabs and new-lines. The next part of the driver table is structure as follows:
bset [integer] (not supported in all versions of nroff)
breset [integer] (not supported in all versions of nroff)
Hor [integer]
Vert [integer]
Newline [integer]
Char [integer]
Em [integer]
Halfline [integer]
Adj [integer]
twinit [character string]
twrest [character string]
twnl [character string]
hlr [character string]
hlf [character string]
flr [character string]
bdon [character string]
bdoff [character string]
iton [character string]
itoff [character string]
ploton [character string]
plotoff [character string]
up [character string]
down [character string]
right [character string]
left [character string]
The meanings of these fields are as follows:
breset bits to set in the c_oflag field of the termio structure before output.
breset bits to reset in the c_oflag field of the termio structure before output.
Hor horizontal resolution in units of 1/240 of an inch.
Vert vertical resolution in units of 1/240 of an inch
Newline space moved by a newline (linefeed) character in units of 1/240 of an inch.
Char quantum of character sizes, in units of 1/240 of an inch. (i.e., a character is a multiple of Char units wide)
Em size of an em in units of 1/240 of an inch.
Halfline space moved by a half-linefeed (or half-reverse-linefeed) character in units of 1/240 of an inch.
Adj quantum of white space, in 1/240 of an inch (i.e., white spaces are a multiple of Adj units wide) Note: if this is less than the size of the space character, nroff will ouput fractional spaces using plot mode. Also, if the −e switch to nroff is used, Adj is set equal to Hor by nroff.
twinit sequence of characters used to initialize the terminal in a mode suitable for nroff.
twrest sequence of characters used to restore the terminal to normal mode.
twnl sequence of characters used to move down one line.
hlr sequence of characters used to move up one-half line.
hlf sequence of characters used to move down one-half line.
flr sequence of characters used to move up one line
bdon sequence of characters used to turn on hardware boldface mode, if any.
bdoff sequence of characters used to turn off hardware boldface mode, if any.
iton sequence of characters used to turn on hardware italics mode, if any.
itoff sequence of characters used to turn off hardware italics mode, if any.
ploton sequence of characters used to turn on hardware plot mode (for Diablo type mechanisms) if any.
plotoff sequence of characters used to turn off hardware plot mode (for Diablo type mechanism) if any.
up sequence of characters used to move up one resolution unit (Vert) in plot mode, if any.
down sequence of characters used to move down one resolution unit (Vert) in plot mode, if any.
right sequence of characters used to move right one resolution unit (Hor) in plot mode, if any.
left sequence of characters used to move left one resolution unit (Hor) in plot mode, if any.
This part of the driving table is fixed format, and you cannot change the order of entries. You should put entries of separate lines, and these lines shoudl contain exactly two fields (no comments allowed) separated by white space. For example:
bset 0
breset 0
Hor
and so on.
Follow this first part of the driving table with a line containing the word "charset," and then specify a table of special characters that you want to include. That is, specify all the non-ASCII characters that nroff(1) knows by two character names. such as \hy. If nroff does not find the word "charset" where it expects to, it will abort with an error message.
Each definition in the part after "charset" occupies one line and has the following format:
chname width output
where "chname" is the (two letter) name of the special character, "width"is its width in ems, and "output" is the string of characters and escape sequences to send to the terminal to produce the special character.
If any field in the "charset" part of the driving table does not pertain to the output device, you may give that particular sequence as a null string, or leave out the entry. Special characters that do not have a definition in this field are ignored on output by nroff(1).
You may put the "charset" definitions in any order, so it is possible to speed up nroff by putting the most used characters first. For example,
charset
em 1−
hy 1
\− 1−
bu 1 + \bo
and so on.
The best way to create a terminal table for a new device is to take an existing terminal table and edit it to suit your needs. Once you create such a file, put it in the directory /usr/lib/nterm and give it the name tab.xyz where xyz is the name of the terminal and the name that you pass nroff via the −T option (for example, nroff −Txyz).
FILES
/usr/lib/nterm/tab.nameterminal files
SEE ALSO
Version 2.5r1 — December 06, 1986