>>>>>boot dual1 >> (BOOT/R5:0 DUAL1 >> 2.. >> ?41 DEVASSIGN, DUAL >> HALT instruction, PC: 00000C1A (MOVL (R11),SP) > Trying to boot from a device that VMS doesn't know how to boot from, > e.g. DUAL1, will do this every time. Solution: B DUA1 Gotta stop blaming VMS. It's the boot ROM that doesn't know how to boot from DUAL1 :-). Tim.