This small board connects two rotary 12-position switch joysticks such
as Happ Controls p/n 50-5618-00 to USB.
The board appears to the PC as a USB keyboard. The keycodes sent to
the PC are fixed and are as follows:
|Player 1 Left
|Player 1 Right
|Player 2 Left
|Player 2 Right
Just plug in, configure MAME with the keys above and go! No host
software needed, no wiring, no configuration, no fuss. The Happ Controls rotary
stick comes with an attached cable which simply plugs in. You may also want to
go to the Input (General) settings in MAME and set the positional delay to zero
and the positional sensitivity to 100% for best response.