10 May
2011
10 May
'11
10:50 a.m.
From: Bob Armstrong
Sent: Tuesday, May 10, 2011 6:49 AM
> Forget RT11FB, RSTS or RSX as they will not do
well in 24KW.
FWIW, RSX-11S will run on an unmapped system. Of
course RSX-11S was
intended for "embedded" applications and it's not very useful as a general
purpose OS. And in theory you can build RSX-11S systems on an RSX=11M or M+
system, but I'm not sure all the stuff you need is part of the standard M/M+
distribution so it might be hard to come up with the necessary files.
At least one version of RSX-11M will run on an unmapped system in 28KW. The
front end PDP-11/40 on a KL-10 runs RSX-20F, which is very much standard -11M
with the exception of the 18-bit sector size in the file system. The -20F
developer's kit consisted of a bootable RP06 pack with -11M on it, and all the
-11M documentation. There is one slim -20F manual which describes the partition
layout.
(Damn, damn, damn, I wish I had saved that damned pack from LOTS, but I didn't
expect that I would ever be managing those systems again at that time.)
Didn't at least some DSSI drives, like the RX7x,
have embedded T11s that
ran RSX-11S?
In point of fact, the intent of RSX-11S is that you build on RSX-11M and run
on -11S. At least, that's what the documentation for the pair says.
Rich Alderson
Vintage Computing Sr. Server Engineer
Vulcan, Inc.
505 5th Avenue S, Suite 900
Seattle, WA 98104
mailto:RichA at vulcan.com
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/