Arduino as COM port mouse

Hello!
Old mouses had rs 232 interface. And windows still have drivers for it.
I think its interesting to try using arduino as a real com port mouse (via ft232). Does anybody know how to realise this algoritm? I can't find something useful..

Thanks.

As always google is a good place to start.

A quick search for "serial mouse protocol" led me to :

http://paulbourke.net/dataformats/serialmouse/

Very simple protocol.

Thanks!
Can I use 7bits com port mode?

The protocol only uses 7 bits, so I would guess so. Why don't you try it?