On 2014-05-20 21:40, Dave McGuire wrote: On 05/20/2014 10:55 AM, Johnny Billquist wrote: Back to trying RSX-11M 4.8. That's 100M and doubtful it'll complain. Unless you want to feel the pain (or the joy) of manually defining memory partitions, I'd suggest you to go PLUS :) Can't! No Split I&D. M+ do not need split I/D-space. But you do need 512K of memory. But the 11/23 and 11/24 are supported CPUs. Didn't you advise me against running M+ on an 11/24 for reasons of no split I/D space? It's not that it won't work, it's that it won't be pleasant. M (non +) runs great on F11-based systems anyway. I don't know (remember) what I might have said. But depending on different things, running M+ on an 11/23 or 11/24 can be a little painful. But running 11M in general is more painful than M+ anyway, so I would at least recommend trying M+. (That said, without split I/D-space, you'll have preciously little pool space, but that might not be a big issue for you right here.) I think that was why. Yeah. Without supervisor mode and split I/D-space, you will have very little system pool. If you are not running a bunch of things on the system, you should still be able to survive though. Oh, and my TCP/IP will not work on those systems. Johnny