Adaptador universal programable para joystick

Interface type:
Programmable Joystick interface
Manufacturer: Handmade
Year: 14-06-1984
Compatible wih: Spectrum 16k, 48k, +48K

Joystick programmable interface made by an amateur person. It has not been possible to obtain the complete scheme because the principal chip had its name deleted. The inteface also had a coat of paint :-O