RTEM-11

[Ethan Dicks]

On 7/14/10, Jerome H. Fine <jhfinedp3k at compsys.to> wrote:
>  In addition, does anyone know  of any systems currently running
> which support RTEM-11 features which allow RT-11 programs
> to run in that environment?  My assumption is that VMS on a VAX
> supported RTEM-11 at some point, but perhaps (if I am correct)
> the RTEM-11 support was not  continued with
> more recent versions of VMS on the VAX and most definitely VMS on the
> Alpha.  Can anyone comment on these questions?

Based on the vague reference at
http://s-and-b.net/help?key=RTEM~Release_notes&title=VMS Help&referer=
and what I know of VMS and DEC hardware, I'd think that RTEM-11 would
require a VAX processor with "compatibility mode", i.e., a "VAX-11"
processor.  The primary models would be the 11/78x, 11/750, 11/730 and
11/725 (I don't recall if the VAX 86xx still had "compatibility mode"
or not, but it should be easy to check).  MicroVAXen and such did not
have it, and Alpha processors certainly did not have it.

That being said, I have no experience with RTEM-11, but I would be
surprised to learn it ran on a machine made after about 1986 or so.

-ethan