Someone asked: "Daniel A. Seagraves" <DSEAGRAV(a)toad.xkl.com> wrote: Which is available under Unix using the 'screen' program. 'Screen' may not be part of the operating system, but it is widely recognized these days that implementing things in user space instead of a monolithic kernel is often a win (in cases where it doesn't seriously harm system throughput). Under Unix you can do the same thing. Just hit control-Z to suspend the job, fire up GDB, and attach to it. I like TOPS-20, but many of the capabilities that I liked are available in Unix. They weren't available in Unix 20 years ago, but OTOH 20 years ago a full Unix system would fit on an RK05. Eric

Sean 'Captain Napalm' Conner wrote: Well, nobody's stopping anybody from doing a TOPS-20 lookalike for current hardware. Linus Torvalds did his. (And as the old quote goes, Unix is just as user-friendly as any other operating system, it just isn't so promiscuous about who it's friendly with). You could do a TOPS-20 "shell" over Linux or you can do your own kernel. You decide. Never used TOPS-20 myself, though I'd like to try it sometime, Eric Raymond speaks highly of it even though nowadays he mostly hacks Linux and has even convinced my wife into installing Red Hat onto an otherwise unused Pentium-90 box so she'll learn skills not included in her nursing education. -- Ward Griffiths <mailto:gram@cnct.com> <http://www.cnct.com/home/gram/> When I was crossing the border into Canada, they asked me if I had any firearms with me. I said "Well, what do you need?" -- Steven Wright

At 12:29 AM 20-10-98 +0000, Eric Smith wrote: A decent batch system and restartable jobs? Huw Davies | e-mail: Huw.Davies(a)latrobe.edu.au Information Technology Services | Phone: +61 3 9479 1550 Fax: +61 3 9479 1999 La Trobe University | "If God had wanted soccer played in the Melbourne Australia 3083 | air, the sky would be painted green"

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On Tue, 20 Oct 1998, Cameron Kaiser wrote: (regarding tcsh and filename / command completion) Tcsh will do command completion for names of executables that are in the current path. Additionally, typing the ambiguous beginning of a command name followed by ^D will return a list of possible commands in the path that start with the characters that you have entered. Of course, it's important (at least in the context of this thread) to remember where the "t" in tcsh comes from. From Richard M. Alderson III's comments in the tcsh man page: THE T IN TCSH In 1964, DEC produced the PDP-6. The PDP-10 was a later re-implementation. It was re-christened the DECsystem-10 in 1970 or so when DEC brought out the second model, the KI10. TENEX was created at Bolt, Beranek & Newman (a Cambridge, Mass. think tank) in 1972 as an experiment in demand-paged virtual memory operating systems. They built a new pager for the DEC PDP-10 and created the OS to go with it. It was extremely successful in academia. In 1975, DEC brought out a new model of the PDP-10, the KL10; they intended to have only a version of TENEX, which they had licensed from BBN, for the new box. They called their version TOPS-20 (their capitalization is trademarked). A lot of TOPS-10 users (`The OPerating System for PDP-10') objected; thus DEC found themselves supporting two incompatible systems on the same hardware--but then there were 6 on the PDP-11! TENEX, and TOPS-20 to version 3, had command completion via a user-code-level subroutine library called ULTCMD. With version 3, DEC moved all that capability and more into the monitor (`kernel' for you Unix types), accessed by the COMND% JSYS (`Jump to SYStem' instruction, the supervisor call mechanism [are my IBM roots also showing?]). The creator of tcsh was impressed by this feature and several others of TENEX and TOPS-20, and created a version of csh which mimicked them. -- Scott Ware NUMS-MPBC Macromolecular Crystallography Resource 303 East Chicago Avenue, Ward 8-264, Chicago, IL 60611 (312)503-0813 PGP Public Key: http://xtal.pharm.nwu.edu/~ware/public.txt

On Tue, 20 Oct 1998, Sean 'Captain Napalm' Conner wrote: both tcsh and bash will do command completion as well. And some interesting notes from the tcsh manual page: THE T IN TCSH In 1964, DEC produced the PDP-6. The PDP-10 was a later re-implementation. It was re-christened the DECsystem-10 in 1970 or so when DEC brought out the second model, the KI10. TENEX was created at Bolt, Beranek & Newman (a Cambridge, Mass. think tank) in 1972 as an experiment in demand-paged virtual memory operating systems. They built a new pager for the DEC PDP-10 and created the OS to go with it. It was extremely successful in academia. In 1975, DEC brought out a new model of the PDP-10, the KL10; they intended to have only a version of TENEX, which they had licensed from BBN, for the new box. They called their version TOPS-20 (their capitalization is trade- marked). A lot of TOPS-10 users (`The OPerating System for PDP-10') objected; thus DEC found themselves support- ing two incompatible systems on the same hardware--but then there were 6 on the PDP-11! TENEX, and TOPS-20 to version 3, had command completion via a user-code-level subroutine library called ULTCMD. With version 3, DEC moved all that capability and more into the monitor (`kernel' for you Unix types), accessed by the COMND% JSYS (`Jump to SYStem' instruction, the supervisor call mechanism [are my IBM roots also show- ing?]). The creator of tcsh was impressed by this feature and sev- eral others of TENEX and TOPS-20, and created a version of csh which mimicked them.