Cory Smelosky <b4 at gewt.net> writes: Directory DUA1:[000000] 000000.DIR;1 BACKUP.SYS;1 BADBLK.SYS;1 BADLOG.SYS;1 = =20 BITMAP.SYS;1 CONTIN.SYS;1 CORIMG.SYS;1 INDEXF.SYS;1 = =20 SECURITY.SYS;1 SYSMGR.DIR;1 VOLSET.SYS;1 =20 Total of 11 files. --- snip --- What's in SYSMGR? You need VMB.EXE, it must be contiguous and it must be referenced by LBN in the system disk's boot block (see WRITEBOOT). And then: sim> b rq1 Loading boot code from vmb.exe %BOOT-F-Unable to locate BOOT fil HALT instruction, PC: 000004C7 (BLBS 549,4C6) Granted, it's been a long long time since I booted an 11/780 but you should be able to use the normal boot file on the floppy of the LSI-11 console. I am puzzled with your boot command. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity.