as posted on ann
...could someone here who is registered at amiga.org tell the chap with the a500 and 3.1 ROM, that he will need to run a simple jumper wire connecting 2 pins on the ROM...I just stuffed a copper wire in the pin holes on the mobo...search for jumper a500 ROM or such in the relevant places for the 2 pin locations...some of the ROMs shipped with the jumper, back in the good ole daze!
