31 Jan
2008
31 Jan
'08
4:14 p.m.
On Jan 31, 2008 3:25 PM, Charles H Dickman <chd_1 at nktelco.net> wrote:
I have a CQD-220/M and it does boot. I don't
recall a problem, but I
know there was a problem with the KFQSA when using the DU boot loader.
The standard distributions that I have seen are Patch Level: 431
Patch 432 includes:
(5) The MSCP bootblock could not boot disks attached to a TD Systems
Viking MSCP controller.
Patch 441 includes:
(3) The MSCP bootblock would not work with a CMD CQD220 adaptor due to
the bootblock relying on the (undocumented?) behaviour of DEC
adaptors.
I haven't yet verified myself that 441 fixes the boot failure I am
seeing with my CDQ-220. The same drive moved to a SQ706A boots fine.
Can a CD-ROM drive be attached to the CQD-220/M? If
so, what drive types
have been successful?
I can boot an XXDP image burned onto a CD and the OVMS73 install CD
using a Plextor CD-ROM drive in 512-byte block mode on both a CMD
CQD-220/TM and a Dilog SQ706A, on a PDP-11 and VAX, respectively.
With the CQD-220 VMS identifies the CD-ROM drive as an RRD40, but with
the SQ706A VMS does not identify the CD-ROM drive as a CD-ROM drive
and I couldn't figure out how to mount the CD to finish the install
after booting and doing the initial standalone backup restore to disk.
Maybe some magic mount parameter is needed that isn't necessary when
VMS identifies the device as a CD-ROM drive.
Is there a way to convert a CQD-220/T to a /M or /TM?
What about a
Viking TMSCP SCSI controller (forget the model)? I got them cheap,
knowing that they didn't do disk and hoping there might be a conversion
method some day.
I think this is a common wishlist item. I think if it is possible you
need to change both the firmware EPROMs and the PAL. Cloning EPROMs
from a /TM to a /T or /M would be trivial. If the PAL
is secured that
might be an obstacle. Has anyone sucessfully done this? Is there
a
/TM version of the CQD-200? I have CQD-200/T that would of course be
nice if it were a /TM.