Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > alt.folklore.computers > #220276
| From | Rich Alderson <news@alderson.users.panix.com> |
|---|---|
| Newsgroups | alt.sys.pdp10, alt.folklore.computers |
| Subject | Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 |
| Date | 2022-03-07 17:18 -0500 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <mddee3d4db3.fsf@panix5.panix.com> (permalink) |
| References | (3 earlier) <5H6UJ.233887$Rza5.134368@fx47.iad> <mddbkymepz3.fsf@panix5.panix.com> <t02n22$aqg$1@news.misty.com> <mdd1qzek05q.fsf@panix5.panix.com> <CcpVJ.46114$mF2.31622@fx11.iad> |
Cross-posted to 2 groups.
scott@slp53.sl.home (Scott Lurndal) writes:
> Rich Alderson <news@alderson.users.panix.com> writes:
>> Johnny Billquist <bqt@softjar.se> writes:
>> I do not know VMS (or RSTS/E or RSX) internals. Is DCL a separate program,
>> like the TOPS-20 EXEC? Or an interaction with the monitor/kernel?
> VMS is an odd beast in that respect. The VAX had a four privilege
> rings (aside: interestingly enough, the relatively recent ARMv8
> architecture also has four privilege rings (with a fifth coming soon)).
> The kernel ran in the most privileged ring, Kernel Mode. RMS (mainly
> derived from RSX-11, IIRC, and authored by Andy Goldstein (IIRC again))
> ran in the next most privileged ring (Executive Mode). The Command
> Interpreter (DCL) ran in the next ring (Supervisor Mode), and user
> applications ran in the least privileged ring (User Mode).
Interestingly, the *2nd generation* PDP-10, the KI-10 processor, implemented a
4-level privilege model: Kernel, Executive, Public, and User. Tops-10 ran
mostly in Executive mode, with only some of the most sensitive routines done in
Kernel mode. Public mode was a user-level mode (i.e., no privileged
instructions such as I/O operations) which allowed for system services similar
to dynamic libraries in modern Unix-style operating systems, but serving a
different purpose. User mode was the bog standard mode for any program not
requiring elevated privileges.
(Public mode was used by the system services such as spoolers so that user
programs did not need to use system calls to interact with unit record
equipment.)
> As with most[*] ring-based privilege architectures, ring switches were
> expensive and I believe once they went to Alpha, that architecture was
> pretty much dead.
The KI model was not ring-based in the way that I understand rings (based on
early Multics writings, mostly); it was simply a matter of a couple of bits in
the process status.
--
Rich Alderson news@alderson.users.panix.com
Audendum est, et veritas investiganda; quam etiamsi non assequamur,
omnino tamen proprius, quam nunc sumus, ad eam perveniemus.
--Galen
Back to alt.folklore.computers | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
TOPS-20 Boot Camp for VMS Users 05-Mar-2022 "Stephen M. Jones" <smj@ma.sdf.org> - 2022-03-02 21:32 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-03 14:30 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-03 16:38 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-03 17:13 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-03 15:33 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-03 21:55 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-04 12:06 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Paul Rubin <no.email@nospam.invalid> - 2022-03-04 13:23 -0800
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-06 17:29 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-06 11:34 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-06 19:40 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charles Richmond <codescott@aquaporin4.com> - 2022-12-23 11:49 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-23 10:34 -1000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-12-23 21:42 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-12-24 11:54 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-24 11:17 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-24 18:01 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-25 11:24 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-25 09:12 -1000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-12-30 17:06 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-30 19:09 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-30 16:11 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Thomas Koenig <tkoenig@netcologne.de> - 2022-12-30 20:22 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmnol.com> - 2022-12-30 16:12 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-30 23:44 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-23 12:18 -1000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-24 03:43 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-24 07:55 -1000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-24 11:08 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-12-24 18:36 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-24 21:09 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-24 14:03 -1000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Anne & Lynn Wheeler <lynn@garlic.com> - 2022-12-24 14:46 -1000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Paul Rubin <no.email@nospam.invalid> - 2022-03-06 11:17 -0800
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 17:53 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-03-07 22:02 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charles Richmond <codescott@aquaporin4.com> - 2022-12-23 11:55 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-23 12:27 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-03-07 03:11 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Quadibloc <jsavard@ecn.ab.ca> - 2022-12-30 13:57 -0800
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Niklas Karlsson <nikke.karlsson@gmail.com> - 2022-12-30 22:11 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-12-30 23:44 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Niklas Karlsson <nikke.karlsson@gmail.com> - 2022-12-30 23:56 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 cb@elaine.df.lth.se (Christian Brunschen) - 2022-12-31 09:02 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-12-30 20:44 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-12-30 20:08 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Quadibloc <jsavard@ecn.ab.ca> - 2022-12-31 00:25 -0800
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-12-31 13:39 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Bob Eager <news0009@eager.cx> - 2022-03-04 00:46 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 "Stephen M. Jones" <smj@ma.sdf.org> - 2022-03-04 18:49 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 drb@ihatespam.msu.edu (Dennis Boone) - 2022-03-04 14:55 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-04 22:14 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Bob Eager <news0009@eager.cx> - 2022-03-04 22:17 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 David Lesher <wb8foz@panix.com> - 2022-03-06 04:35 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-06 05:40 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-04 22:46 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-06 17:21 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-06 11:34 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 17:42 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-06 20:43 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 15:07 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 17:51 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 17:07 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-07 11:47 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 19:19 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Andreas Eder <a_eder_muc@web.de> - 2022-03-08 10:08 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-08 07:49 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2022-03-08 19:47 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Bob Eager <news0009@eager.cx> - 2022-03-09 01:03 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 20:18 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 19:37 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Dan Espen <dan1espen@gmail.com> - 2022-03-07 14:53 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 20:43 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-07 19:52 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-07 17:18 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 22:33 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 22:58 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-08 00:06 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-08 07:49 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-08 15:22 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-08 11:17 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Vir Campestris <vir.campestris@invalid.invalid> - 2022-03-08 21:09 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-08 21:33 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-07 20:24 +0100
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-03 15:24 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Ahem A Rivet's Shot <steveo@eircom.net> - 2022-03-03 21:06 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Rich Alderson <news@alderson.users.panix.com> - 2022-03-04 22:47 -0500
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Peter Flass <peter_flass@yahoo.com> - 2022-03-04 12:06 -0700
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmail.com> - 2022-03-07 10:48 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 scott@slp53.sl.home (Scott Lurndal) - 2022-03-07 17:03 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 D.J. <chucktheouch@gmail.com> - 2022-03-07 19:52 -0600
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Fred Smith <fred@thejanitor.corp> - 2022-03-08 04:13 +0000
Re: TOPS-20 Boot Camp for VMS Users 05-Mar-2022 Johnny Billquist <bqt@softjar.se> - 2022-03-08 16:32 +0100
csiph-web