I have an ipaq-4 which did this same problem to me and fixed itself automatically somehow, I have a JPAC I just hooked up a new cab everythings perfect all buttons perfect, I have a button for "enter" works fine in windows, works fine in gameex, all I want it for is when I push TAB in MAME to hit ENTER so I can change controls, it will not work in MAME, in or out of gameex.
Question 1:
Why?
Question 2: using mame32 can I customize what it views as "enter" to a different Key such as "T" so I dont have to deal with this.