[comp.sys.amiga] Reading extra buttons on joysticks that have them

kuan@iris.ucdavis.edu (Frank [Who me?] Kuan) (11/28/90)

As several people mentioned, there are games that take advantage of
joysticks that have more than one button (Genesis and Nintendo for
example).

Anyone know what is the correct (and os friendly) way of reading these extra
buttons? 

If not, does anyone know what the hardware addresses of the extra  `
buttons are?


Thanks in advance.