Adding a new PAL chip to my LOTR (along with display and 10.02 ROM) in order to add a shaker. I already fried one ROM set and don't want to repeat same mistake. I'm clear on the orientation of the main ROM and display ROM but there is no notch on the PAL to use to orient. One end of the PAL does have a circle impression that is slightly larger than the circle at the other end. Not sure if that is relevant but it's what I could see as a unique marker. Any guidance?