The Apple 2 GS I have has ROM 0, no ROM is mentioned at powerup. I also suspect it has the early faulty video chip as I ran Elite on it and there was colour fringes on the black and white action screen. The monitor I'm using is a 0.28mm multiscan and isn't the cause. What disadvantages are there to having ROM 0? The computer seems fully usable but what problems should I expect?