add a README file

Harald Welte 2010-07-09 09:25:33 +02:00
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gen_ladder - tool to generate protocol ladder diagrams
(C) 2010 by Harald Welte <>
This tool can be used to generate typical ladder diagrams as they are often
used in the description of networking protocols.
The input file is a ".lad" file, from which generates a graphviz
file called ".dot", which in turn can be processed by the "dot" program to
generate a .ps (postscript) or .svg output file.
As an example, I have included a "test.lad" file, which you can process by
make test.svg
The manual intermediate steps can be seen from the Makefile.