Doug Gwyn (VLD/VMB) <gwyn@BRL-VLD.ARPA> (01/06/85)
Device-Independent TROFF is a rewrite of TROFF to improve support for a wider variety of typesetters; it was done by Brian Kernighan some time ago and is distributed in two forms: Typesetter-Independent TROFF package from AT&T Bell Labs (The original packaging; includes tbl/eqn/refer/ideal/pic/-ms) Documenter's WorkBench from AT&T Software Sales & Marketing (Essentially the same TITROFF with a different complement of typesetter filters, minus refer/ideal/-ms, adapted for UNIX System V) TITROFF is (or was) available directly from Bell Labs, unsupported. DWB is available from AT&T, supported (you will probably need to work on the device filter for your particular typesetter, though). Either requires a separate license. AT&T was including DWB V1.0 "free" as part of upgrades from UNIX System V Release 1 to UNIX System V Release 2.0 until April 1984. The combination of TITROFF & DWB includes support for the following typesetters: C/A/T (needs work) Canon Imagen Imprint-10 APS-5 Mergenthaler Linotron-202 The font tables are stored external to TROFF and can be edited without TROFF source (I am not sure how suitable a binary DWB license is for this). DITROFF output is ASCII and it is not too hard to write a device filter IF you have the source for a good one on hand to use as a guide. The DWB device filters are, if anything, excessively commented so one could hardly go wrong working from one of those. Apart from supporting a wider range of fonts and so forth, the most notable functional addition to TROFF accomplished by DITROFF is a set of graphic typesetter primitives, along with the "pic" diagram preprocessor.
Myra Hartwig (SECAD) <myra@BRL-AOS.ARPA> (01/07/85)
Device independent troff - is an AT&T software package, it costs approximately $4,000 (at least that's the gevernment price) for a source license. Myra Hartwig <myra@brl.arpa>