>IIRC the M$ 3 byte packet is a subset of the 5 byte packet - or to be
more
>correct the 5 byte packet is a kludge around the M$ 3 byte packet to get
the
>extra information for the third button etc. There is any amount of
>information out on the 'net about these formats.

3 and 5 byte formats:
http://www.hut.fi/~then/mytexts/mouse.html


3 and 4 (Intellimouse) byte formats:
http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/mouse/mouse.html

Les

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