The files in this directory are used to describe the basic configuration of a board. (Note that we use "board" in its loosest sense, referring to either a target or host). The structure of these files is very similar, and I would suggest that you follow this when writing a new one.
Two files need to be created for a given board; the appropriate file in this directory, and one in config/. The one in here is used to set up entries in the data array describing the board, while the one in devo/dejagnu/config is used to describe the actions used to actually communicate with the board.
A third file (the site-specific machine file) can be used to describe any site-specific functionality, such as port numbers, serial devices, etc.
Bernhard Reutner-Fischer