(xemacs.info)Terminal Init

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27.6.3 Terminal-Specific Initialization
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Each terminal type can have a Lisp library to be loaded into Emacs when
it is run on that type of terminal.  For a terminal type named
TERMTYPE, the library is called `term/TERMTYPE' and it is found by
searching the directories `load-path' as usual and trying the suffixes
`.elc' and `.el'.  Normally it appears in the subdirectory `term' of
the directory where most Emacs libraries are kept.

   The usual purpose of the terminal-specific library is to define the
escape sequences used by the terminal's function keys using the library
`keypad.el'.  See the file `term/vt100.el' for an example of how this
is done.

   When the terminal type contains a hyphen, only the part of the name
before the first hyphen is significant in choosing the library name.
Thus, terminal types `aaa-48' and `aaa-30-rv' both use the library
`term/aaa'.  The code in the library can use `(getenv "TERM")' to find
the full terminal type name.

   The library's name is constructed by concatenating the value of the
variable `term-file-prefix' and the terminal type.  Your init file can
prevent the loading of the terminal-specific library by setting
`term-file-prefix' to `nil'.  Note: Init File.

   The value of the variable `term-setup-hook', if not `nil', is called
as a function of no arguments at the end of Emacs initialization, after
both your init file and any terminal-specific library have been read.
Note: Init File.  You can set the value in the init file to override
part of any of the terminal-specific libraries and to define
initializations for terminals that do not have a library.