On Wed, 18 Oct 2023 at 14:27, hupfadekroua via cctalk <[email protected]> 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_Oct89.pdf 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
