On Wed, 18 Oct 2023 at 14:27, hupfadekroua via cctalk <cctalk(a)classiccmp.org> wrote: 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