Just found out that the core mame2003 plus does not recognize the gameshell directional keys
and the md5sum is
MD5 (mame2003_plus_libretro.so.zip) = 58c4e3409170d1d0a339d6665fddc5c7
in case anyone met this problem
also I tested the v0.3 mame2003 plus core,it works fine
the backup core of mame2003 plus in v0.3 downloadable url is
and for v0.4 image, we use the path of
libretro.com ,so this problem will effect v0.4 users for now
Steps 7-9 in this post will also work.
I’m guessing that once we plug in an analogue joystick into the Arduino keyboard, it will correctly recognise the input. Either that or an old school arcade track ball haha!! Centipede style. (Boy I would love to mod one of those into my Gameshell!)
For now though, nothing really heavily benefits from an analogue input stick vs a digital dpad, as tempted as I have been to install PSP style analogue slider sticks.
thanks very much
in case of anyone need
I just made it into a cfg file