PROGRAMMING : Why not document it?
...Because then you have to support it. And then you have to maintain backwards compatability.
IBM, in an article about the POWER5 over at ars, mentioned that they haven't made a particular diagnostic interface public so they can change it and not maintain backwards compatability. Interesting take on it - Why not have a bunch of 'undisclosed' interfaces to things that are more powerful or whatever, but because they are undisclosed they are not official and guaranteed to NOT be compatable in the next version.
IBM, in an article about the POWER5 over at ars, mentioned that they haven't made a particular diagnostic interface public so they can change it and not maintain backwards compatability. Interesting take on it - Why not have a bunch of 'undisclosed' interfaces to things that are more powerful or whatever, but because they are undisclosed they are not official and guaranteed to NOT be compatable in the next version.
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