The EMULEX UC07 SCSI Adapter manual ( http://www.bitsavers.org/pdf/emulex/UC0751001-F_UC07_Feb90.pdf) says: "Ultrix-11 V3.0 and above"
Ulli Am Mi., 18. Okt. 2023 um 16:32 Uhr schrieb Paul Koning via cctalk < cctalk@classiccmp.org>: > > > > On Oct 18, 2023, at 10:20 AM, Henry Bent via cctalk < > cctalk@classiccmp.org> wrote: > > > > On Wed, 18 Oct 2023 at 10:16, Bill Gunshannon via cctalk < > > cctalk@classiccmp.org> wrote: > > > >> > >> > >> On 10/18/2023 10:00 AM, Henry Bent via cctalk wrote: > >>> On Wed, 18 Oct 2023 at 09:56, hupfadekroua via cctalk < > >> cctalk@classiccmp.org> > >>> wrote: > >>> > >>>> Hello all, > >>>> > >>>> does someone have a SCSI disc image of Ultrix 11 for a QBus based > >> (11/73) > >>>> PDP11. > >>>> > >>> > >>> Ultrix-11 doesn't support SCSI disks, as far as I am aware. What > >> hardware > >>> are you trying to use? In any case, you can easily use SIMH to install > >> 3.1 > >>> (or your preferred version) and then transfer that to real hardware. > >> > >> PDP-11 SCSI Modules emulate MSCP and RA disks and work fine with > >> Ultrix-11. > >> > > > > Interesting. My Dilog DQ614 (ST506 emulating RL02s) specifically does > not > > work with Ultrix, but does work with 2.xBSD and v7, so I would not > > necessarily assume that a third-party board was going to work with > > Ultrix-11's drivers. > > There are two possible issues. One is that SCSI is a packet oriented > storage command/response system similar to MSCP but different. So the kind > of controllers Bill mentioned are essentiallly translators between the two > protocols. > > If what you have is a native SCSI controller -- one that exposes the > actual SCSI commands -- then that requires an entirely different driver > because that isn't MSCP. > > If you have an MSCP translator type controller, but the translation is > poorly done, you might end up with it failing for some operating systems. > That's not too unlikely given that the MSCP spec was for a long time a DEC > confidential document, so third parties had to reverse engineer things (and > dodge DEC lawyers). > > paul > >
