The software to emulate an ATARI ST mouse using a Raspberry Pi as the hardware interface
Youtube video on this can be found at: https://youtu.be/ED3PSM4Mwss
Youtube playlist on all my Atari ST activities at: https://www.youtube.com/playlist?list=PLjXZsqjhnBUp37Nqo30A-rKNJkGeGCVBf
Please see the readme.txt on my suggested build steps. The Youtube video explains what I did.
You can see my Youtube via: http://www.backofficeshow.com/youtube
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I will be adding to my instrucatble account as well: http://www.instructables.com/member/DrAndy