You're welcome. Other theoretical alternatives are one of the later 2.9BSD patches, though I have had no success getting those to run on anything, and maybe BRL UNIX from the CSRG DVD? I would appreciate hearing from anyone who has tried to get BRL UNIX running. -Henry On Mon, 21 Sep 2020 at 19:36, Paul Riley wrote: > Thanks Henry, that’s an interesting alternative. > > I’m trying to get a photo of the drive label. > > Paul > > Sent from my iPhone > > On 22 Sep 2020, at 7:28 am, Henry Bent wrote: > >  > On Fri, 18 Sep 2020 at 23:24, Paul Riley wrote: > >> >> Team, >> >> I’ve read thru the FAQ and other sources regarding compatibility of >> Research and other flavours on the PDP-11. I have two physical machines, an >> 11/03 and an 11/23+. I’m choosing which version to use on each machine. >> >> Is LSX the only option on the 11/03, or could I run V6 or Mini-Unix with >> more RAM? >> >> From the FAQ, it says V7 would support 11/23 with kernel recompilation, I >> assume includes 11/23+. I see 2.11BSD would also run on a ‘23 (and + I >> guess) with 1MB or more of RAM, so that would be preferred. I suppose 2.11 >> would be preferable. >> >> I also have found another 11/23+ system from a seller here in China. >> There’s the system, and a VT100, and a hard drive I can’t identify. Here’s >> a photo, does anyone know what it is? I may bid for it... >> >> Paul >> >> *Paul Riley* >> > > Ultrix 3.1 should support the 11/23+, which would give you memory support > up to 4MB as well as support for TCP/IP if you have a DEQNA. I don't think > 2.11BSD will run on anything without split I/D which the 23 does not have. > > Without a closer view of the label I doubt that anyone could give you a > definite identification of that hard drive. > > -Henry > >