home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!sun-barr!news2me.ebay.sun.com!cronkite.Central.Sun.COM!texsun!netdev!mic!montagar.com!davidc
- From: davidc@montagar.com (David L. Cathey)
- Newsgroups: comp.os.vms
- Subject: Re: equivalent to SET BOOT
- Message-ID: <1992Sep2.000239.16984@montagar.com>
- Date: 2 Sep 92 00:02:39 GMT
- References: <10980@platypus.uofs.uofs.edu>
- Organization: Montagar Software Concepts, Plano TX
- Lines: 26
-
- In article <10980@platypus.uofs.uofs.edu>, awb702@jaguar.uofs.edu (Alex W Bryant) writes:
- >
- > Does anyone know if it is possible to issue an equivalent to the
- >>>>SET BOOT <nickname> [>boot-parameters>], without bringing down the system.
- > We are running VMS5.5 on a 4010, 6320, and a 6610. Thanks.
-
- Yes, it is possible, however, I don't have the specifics for your
- harware types.
-
- The boot information is stored in NVRAM in high memory. This memory
- is accessed by the ROM console program (which is bascially a VAX routine
- running in physical address mode), and is available in virtual mode by
- mapping the proper PFN's (See $CRMPSC) to the process and reading/writing
- them.
-
- Unfortunately, I don't know where those PFN's are at, as it has
- been a while since I've seen the code to do that (change next boot device
- while VMS is running, so you can boot somewhere else later...)
-
- > ________________________________________________________________________
- > Alex W Bryant - UCS University of Scranton
- > awb702@jaguar.ucs.uofs.edu
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- David L. Cathey |INET: davidc@montagar.com
- Montagar Software Concepts |UUCP: ...!montagar!davidc
- P. O. Box 260772, Plano TX 75026-0772 |Fone: (214)-618-2117
-