Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 8/7/84; site ucbvax.ARPA Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!info-vax From: info-vax@ucbvax.ARPA Newsgroups: fa.info-vax Subject: Re: Booting from RA81s Message-ID: <3059@ucbvax.ARPA> Date: Mon, 5-Nov-84 02:20:05 EST Article-I.D.: ucbvax.3059 Posted: Mon Nov 5 02:20:05 1984 Date-Received: Tue, 6-Nov-84 06:41:40 EST Sender: daemon@ucbvax.ARPA Organization: University of California at Berkeley Lines: 21 From: Mark Johnson What is wrong with DU0BOO.CMD?? That is what we use on our system. In case you don't have a copy of it, here are the register settings... DEPOSIT/I 11 20003800 ! SET UP SCBB DEPOSIT R0 11 ! UDA-MSCP DISK DEPOSIT R1 3 ! UBA TR=3 DEPOSIT R2 3F468 ! CSR ADDRESS OFFSET = 3F468 DEPOSIT R3 0 ! CONTROLLER UNIT = 0 DEPOSIT R4 0 ! BOOT BLOCK LBN (UNUSED) DEPOSIT R5 4000 ! SOFTWARE BOOT FLAGS DEPOSIT FP 0 ! SET NO MACHINE CHECK EXPECTED This works for booting from the first UDA50 on the first unibus. Change the unit number and/or CSR address (?) for other drives. I thought I saw the details somewhere about the register usage, but since I am at home (& without manuals) I can't give you the proper reference. Send me a line if you need the details if someone doesn't beat me to it. --Mark Johnson