18 Oct
2023
18 Oct
'23
4:13 p.m.
On Wed, 18 Oct 2023 at 14:27, hupfadekroua via cctalk <cctalk(a)classiccmp.org>
wrote:
Hello all,
are there some experiences to install as well as to configure a Dilog
SQ706a QBus SCSI controller in a PDP11/73 successfully?
The controller in question is working properly, that's executing the self
as well as the host DMA connection tests successfully.
The format procedure of a physical and of an emulated SCSI drive will be
executed with success also.
But how to configure the Dilog SQ706a as well as the 11/73 properly, so
that the SCSI drive can be accessed as DU0.
I'm using an SCSI RSX image on a ZULU SCSI emulator inherited from an 11/73
running successfully using a native DEC SCSI controller.
I don't find any successful procedure on the web beside the manuals on
bitsavers, which only can be seen as examples.
A.
http://bitsavers.org/pdf/dilog/SQ706A/2120-0184-E_SQ706A_Jan90.pdf and/or
http://bitsavers.org/pdf/dilog/SQ706A/SQ706A_SCSI_MSCP_Disk_Controller_Oct8…
should give you what you need for setup. It looks like the controller maps
SCSI devices as-is to MSCP devices, so you'll probably want to set up your
SCSI emulator with the geometry from a DEC drive that Ultrix-11 understands
- I believe that 3.1 has built-in support for the RA60, RA80, and RA81 - so
as to avoid having to specify a custom drive type. This also means that
you could do an installation in SIMH to the disk of your choice, and then
copy that disk image to the SCSI emulator's disk.
There isn't really going to be a hand-holding walkthrough for this, if
that's what you're looking for.
https://www.tuhs.org/Archive/Distributions/DEC/Fred-Ultrix3/setup-3.1.txt
will walk you through the basics of installing Ultrix. I'd suggest getting
SIMH setup to match your hardware as closely as possible, install Ultrix-11
on that, get comfortable using it, and only then worry about moving it to
real hardware. If you have specific questions we can certainly try to
answer them, but there isn't going to be a walkthrough to install Ultrix on
your particular hardware setup, and certainly not one to walk you through
setting up the Dilog board.
-Henry