I got my PDP-11/73 booting by connecting an RX02 drive to the system and using an RT-11 boot floppy. I've convinced myself that the 1.5mb of memory (two M8059s and a third party card) works and that the KDJ11-A CPU is working as well as the multi-function boot card (M8047) and the RX02 drive and controller (M8029). Unfortunately, I still can't access the RL01 drive. RT-11 sees the controller card but if I type "DIR RL0:", there is no indication that the drive is even accessed. The disk seems to spin up and the ready light comes on on the drive but I don't seem to be able to access the drive from RT-11. I've also tried using a scratch pack and typing "INIT DL0:" but that doesn't work either. Does anyone have any idea what might cause this kind of behavior? Also, can anyone make me a bootable RX02 disk with the RL01 diagnostics on it? I can supply the blank disk? Thanks, David