I just got HDOS to boot on my H8. I've found out the following: 1. You don't need the H17 ROM or RAM chips on the controller board. 2. XCON8 contains the H17 ROM code which it relocates to 030.000 where it should be. 3. An H17 controller card won't work with a defective U10 chip. Carroll -- Delivered by the SEBHC Mailing List