From mboxrd@z Thu Jan 1 00:00:00 1970 From: shoppa@trailing-edge.com (Tim Shoppa) Date: Thu, 7 Feb 2002 06:23:46 -0500 (EST) Subject: [pups] bootstrapping an RT-11 image via VTserver In-Reply-To: from "Jonathan Engdahl" at Feb 06, 2002 10:09:35 AM Message-ID: <20020207112346.A6A2218336@mudd.trailing-edge.com> > One assumption is that the utility only uses memory and TT: system calls -- > no disk accesses or swapping. Is it possible to abuse RT-11 in this manner? RT-11 does support magtape installation via a special version of DUP called MDUP. If you look on a full RT-11 V5.x distribution, you will find "MDUP.MT", "MDUP.MS", and (depending on version number) "MDUP.AI" and "MDUP.MU". These are "snapshots" of RT-11 systems with a single tape driver (MT, MS, or MU) and a number of different disk drivers installed (so they don't have to be FETCHed) and running the special install-only build of DUP. I think there is some MDUP info in the doc set, though it is heavily oriented (of course) towards magtape installtion, not serial port installation. But the idea is sound. > I wonder if it would be possible to bootstrap a VM0: image into high RAM and > boot from it? Yes, this works, and is even officially supported in the later 5.x releases (where it is used as part of the AI installation procedure.) Tim.