On Sun, 29 Oct 2023 at 13:00, hupfadekroua via cctalk <cctalk@classiccmp.org> wrote:
> Hi all, > > I tried several ways to get a working SCSI image to be successfully boote > on a ZULU 2024 SCSI Emulator. > > 1. I do have an Image of an RZ25-E drive containing RSX11M Plus, which is > booting properly. This is a raw dd based disc image of a SCSI drive. > 2. I got a disc mage by Jacob, which is booting using simh, but not using > the ZULU on a physical 11/73 > 3. I created a fresh installation of Ultrix 11 using simh 3.9.x creating a > RD54 image which won't boot on the ZULU an the physical 11/73 > 4.. I created a fresh installation of Ultrix 11 using simh 3.9.x directly > into a physical SCSI drive partition, created an image via dd which doesn't > want to boot on the ZULU. Simh is booting properly from a dd image of this > partition. > 5. Simh is telling me in general using a (virtual) RQDX3 controller. Maybe > the images created won't boot because of being created by the virtual RQDX > 3 controller? > > How to create a raw disc w/o any controller specific format - simply a > plain Ultrix 11 image as a target for a SCSI drive to be booted either from > the physical, or from a virtual (ZULU). > > Newer versions of SIMH (v4, I'm not sure exactly when support was added) allow you to "set rq type=RQDX1" which in the case of the RD54 might make a difference, and the Ultrix-11 ra driver does treat the controllers slightly differently. I'm not sure that it should actually make a difference, but that would be the first thing that I would try. How does the controller identify itself when booting RSX-11? That could give some hints as to what might be happening with Ultrix. You could also try 2.11BSD, or even 2.9BSD, to see if those are able to boot and see how they identify the controller. -Henry
