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From: walsh%bbn-unix@sri-unix.UUCP
Newsgroups: net.unix-wizards
Subject: Re:  Need add'l troff term support
Message-ID: <12622@sri-arpa.UUCP>
Date: Fri, 14-Oct-83 08:51:38 EDT
Article-I.D.: sri-arpa.12622
Posted: Fri Oct 14 08:51:38 1983
Date-Received: Sat, 22-Oct-83 02:44:07 EDT
Lines: 23

From:  Bob Walsh <walsh@bbn-unix>


It's really not too difficult to write nroff driving tables.  If you
have access to the source for one, you can use is as a pattern for
any others you want to write.  In general, the table looks like

	information that describes lines per inch...
	mapping from a character to a string
		'a' -> width 1, 'a'
		alpha -> width 1, either an escape code that accesses an
			alternate character set or a sequence that uses
			normal characters to imitate an alpha

The table is just an initialized C data structure which is loaded by nroff
at run time.  Just compile the source and move it to /usr/lib/term.  Use
the nroff documentation in volume two to help determine the order of the
characters in the driving table.

For example, if you have a spinwriter you can write driving tables for
various thimbles and foreign or mathematical character sets.

bob walsh