I have an 84 iie PCB that boots fine and passes the onboard test but when I put a known working 80 column memory card in the auxiliary slot the onboard shows RAM errors when I know there are none. It shows RAM 10110001. If I put a plain 80 column card in with no memory and go to 80 columns I get garbage in the screen but I am able to type in 80 columns. The 80 column card without the ram doesn’t effect the passing onboard either, only fails with the memory on the card. I’ve changed the IOU as well as the LS125 and LS374 just because traces from the slot went to these ICs. No improvement. The machine boots disks fine with a controller card, as long as the software doesn’t have to get something from the auxiliary card. I’m trying to upload screenshots but they don’t seem to be attaching to the post.