From: Iggy Drougge <optimus(a)canit.se> MSCP, Mass Storage Control Protocal. Unlike PCs VAX storage controllers are very smart and do part of the work independant of the interface to the media. It allows a MFM , EIDE or SCSI disk to look and work the same to the OS. booted from Well, there is nothing to forget in the MVII, no cmos like PCs. The boot sequence is look on the bus for MSCP disk(s) and try to boot each, if that fails try to boot via network, if that fails look for a rom board and try to boot that. If it's failing to find the SCSI board/drive (likely if it tried the net) then you either put the card in the wrong place or the cables on wrong. Q-bus, unlike PCs, has a serial ordered bus grant and interrupt structure. That means if the chain is broken all the devices down the line from the break will not be seen. The only critical devices are disks, NIC and serial ports. No. MOP, yes. TFTP no. Actually MVII is a fairly simple machine. Allison