[fa.info-vax] Booting from RA81s

info-vax@ucbvax.ARPA (11/03/84)

From: Mike Iglesias <iglesias@uci-750a>

We can't find any information in either the manuals or the
release notes telling which dduBOO.CMD file to use when booting
from RA81 disks on a UDA50.  Does anybody know which ones to use?
Thanks for any info.

Mike Iglesias
University of California, Irvine

info-vax@ucbvax.ARPA (11/03/84)

From: Nancy Pace <Nancy@USC-ECLC.ARPA>


For our HSC50, I had to modify a couple of template files to make
deposits into R2 and R3 for the appropriate drive.  The template
files are CIGEN. and CIBOO.CMD.

Nancy Pace
-------

info-vax@ucbvax.ARPA (11/05/84)

From: Mark Johnson <MHJohnson@HI-MULTICS.ARPA>

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 <MHJohnson @ HI-MULTICS>