devkitPro

Does the gba have any harware I/O on the gba itself? Like an arduino has digital outputs. i know that the ext port must have some I/O capabilities, but other than that, is there any other inputs or outputs on the gba?

Thanks

Depends what you're looking for really - the link port lines can be directly controlled in general purpose mode, see http://nocash.emubase.de/gbatek.htm#sio ... urposemode