Northstar Update

OK, I ran through the Integrated Systems tests in the Northstar Horizon Computer System manual and I've discovered a few things. 1. I don't think it's the floppy drive or the controller or the disks. According to the steps that I completed successfully, the problem is most likely with the RAM conflicting with the PROM address on the MDS-A3 disk controller. 2. I pulled ALL the RAM out of the machine, as per the instructions, and put just the RAM A3 (16k N* card) into the machine for testing. BUT, after testing, I pulled it out and found one of the bypass caps is broken off at the board surface (easy fix). QUESTIONS: I can repair the RAM 16 A3 but I don't have the switch settings and jumper settings (J) to set it to start at 2000H. What are these? Also, I have a RAM 16 A2 board that I can try. Are the switch settings and the jumper settings on it the same as the A3 to start at location 2000H? Finally, will NSDOS run in 16K ram? I see no indication in the manuals that it won't but it's a good question to ask anyway. Thanks... Anthony Clifton