test-drb February 2017

test-drb@ccmp.vtda.org

153 participants
189 discussions

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > 64K. That's 64KB, right? DEC used to talk of PDP-11 memory in words, back in the day, so it's never quite clear unless the 'B' or 'W' is specified. Anyway, 64KB out to be enough to run most things. I have't looked to see how big a system with just RL and DL drivers, and a minimum number of disk buffers (that's probably the easiest way to get the size down almost as far as it will go) is, but it's probably in the region of 30-35KB (20KB text, and 10-15 KB data). That leaves plenty for user processes (not max sized, of course). > I'd like to get another M7891, mine is only 1/2 populated. Oh, so that must have been 64KW - 128KB. That will give you plenty of room for a decent-sized kernel, and user processes. Wonder why it won't boot, then? Anyway, those are pretty rare. I have a couple of spare M7847's; they're only 32KB, but they'd help. You've got a couple of spare hex MUD slots now in the DD11-C, right? Speaking of which, where is the M7891 plugged in? It couldn't go in the DD11-B, or in the CPU backplane? > typing anything kills the CPU and I have to restart the system.. Sorry, need exact details: after the '!' prompt, anything you type kills the system on the first character? Or only "rlunix<CR>" does? How about "foobar<CR>"? I'd have to look at the bootstrap source, but I think typing a non-existing file name should take you back to the top-level prompt. Noel

7 years, 2 months

RL02 version of UNIX6?

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > doesn't hurt to try I suppose Absolutely. > My fear is that it will not have enough RAM on top of whatever other > issues are present. Oooh, good point - I hadn't thought of that. I couldn't quickly find a 'minimum memory required' in the release notes for V6; the 'Unix Summary' says it needs "48K to 124K words". I think that might be a bit excessive; I seem to recall our -11/40 had, to start with, only 48KB. Anyway, try it, and let us know what happens. How much memory does the system have on it now? If it doesn't work, I can do some experiments and see what's the least amount of memory one needs. There are a whole bunch of parameters which will reduce the size of the resident OS; if necessary, I can turn them all down to the minimum, and see what we get - although just reducing the number of disk buffer may do it. As for the applications, it does swap, so there's no requirement for more than one process to be resident at a time, so whatever the largest is - probably the C compiler - there only needs to be enough memory left over after the OS is loaded, for that one. It looks like the shell is about 10KB, for example. If it won't boot, don't trash the disk: if we send you another bootable disk, we can make it tiny (only Unix, and enough files to get it running: /etc/init, /bin/sh, etc), and if/once it books, you can mount the disk you just wrote and move the bootable Unix system image over, and then reboot on the current disk, to get to the rest of the stuff. Do you have two working RL drives on the machine? Noel

7 years, 2 months

RL02 version of UNIX6?

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > Can one be made using simH to dump and set up for RL02 that can then be > ported as a RL02 disk image to actual RL02 drive? I see someone has already provided a pointer to someone who ha done this; I'm not sure if that system will boot on a hardware 11/40, or if it was built with m45.s, or some simlar issue. It would be pretty easy for anyone with a working V6 UNIX (either on hardware, or emulated) to do this, _iff_ they have a V6 RL driver. ('Vanilla' V6 does not include one.) My 'Bringing up V6 under Ersatz-11' page describes one: http://www.chiappa.net/~jnc/tech/V6Unix.html#rl You might want to get familiar with building V6 kernels, _any_ hardware variations you wish to support (e.g. more than one DL11 seria line) will involve re-building the kernel. Not to worry, it's a pretty simple process, it only takes a few commands, and a few moments (more on a real machine, of course :-). That page include almost all the directions on how to do so, but note that one must also edit 'rootdev' in c.c if the root file system is to be on an RL (no, mkconf as distributed with 'vanilla' V6 won't do any of the legwork for you, it does not know about RL drives). Note that running 'vanilla' V6 Unix i) has some bugs/issue (e.g. you can't set the date to this century; the user interface is _strictly_ for printing terminals, etc, etc, etc), some of which are handled here: http://www.chiappa.net/~jnc/tech/V6Unix.html#Issues so I would advise checking it out. (You can skip all the Ersatz-11-specific stuff, like the 'DOS Device' to allow Unix to read files from the host file-system - a very useful capability in an emulated Unix!) > From: Angelo Papenhoff > http://www.tom-yam.or.jp/2238/rl/ Note that his page says "bootblock is rluboot from v6_rl02_unknown, which lacks the source code"; I disassembled and commented the code, see above links. Noel

7 years, 2 months

RL02 version of UNIX6?

by billdegnan＠gmail.com

I thought this question was answered recently but I can't find the answer. I have the RK disk version of UNIX6 for PDP 11/40 but I could not find an RL02 version. does this exist? Can one be made using simH to dump and set up for RL02 that can then be ported as a RL02 disk image to actual RL02 drive? I can get an image onto the drive, should the image exist. My PDP 11/40 is not compatible with Unix 7, but I would be happy with 5 or 7 if it'll run on a 64K system. Thanks Bill

7 years, 2 months

RT-11 Basic source available

by jnc＠mercury.lcs.mit.edu

> Here: > http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/macro.tar > is a tar file with the whole works, along with the MACRO-11 source. BASIC is not ready yet, and won't be for a few days. The problem is that I can't get it to assemble into a working version, which I would like to do, before sending it out. I _think_ that what happened is we made some change in the toolchain, to support other things we were doing, and one of them 'broke' re-building BASIC - except that since nobody was actually _doing_ anything with BASIC, we had no reason to re-build it - and so nobody noticed we had 'broken' it. If someone's desperate to get their hands on this, let me know, and I can go ahead and send out what I have, with the proviso that you can't build a working version from the MACRO-11 source at this point. > If the first person to try MACRO could send me feedback, to see if the > whole process works, I'd be grateful. Did anyone grab the MACRO-11 TAR and try it yet? Noel

7 years, 2 months

Looking for Eyring PDOS for TMS-9900

by schubert＠microsys.de

Hi Camiel Vanderhoeven I nearly got all about PDOS and the TM990 system......however only on 8" floopy disks. I also have the complete documentation and a TM990/100M system with a DRAM and a Floppy-Controller board. best regards Walter Schubert -- MicroSys Electronics GmbH, M?hlweg 1, D-82054 Sauerlach Tel.: +49 8104 801-0, Fax: +49 8104 801-110 Sitz der Gesellschaft: Sauerlach, HRB M?nchen 48340, Ust.ID No: DE129296566 Gesch?ftsf?hrer: Dipl.-Ing. Richard Loeffl, Dipl.-Ing. Dieter Pfeiffer http://www.microsys.de

7 years, 2 months

[cctalk-request@classiccmp.org: confirm 38290c8a992491eda604beff5a06ff20cd7e85f5]

by blstuart＠bellsouth.net

On Tue, 1/31/17, geneb <geneb at deltasoft.com> wrote: > On Tue, 31 Jan 2017, Alfred M. Szmidt wrote: >> Can someone please fix the mailing list software? This has been >> reported every once in a while by a bunch of people for over ten >> years. > > Bounces aren't caused by the mailing list, they're caused by the > destination mail server. What I've been wondering for a while is the span of time over which the bounces are counted. I can understand shutting a subscriber off for getting 10 bounces in as many minutes. On the other hand if those 10 bounces are spread over two months, it seems rather severe. BLS

7 years, 2 months

Pac-Man (Alfred M. Szmidt)

by c.murray.mccullough＠gmail.com

As Alfred wrote: "How about some credit where credit is due, and not rewriting history willynilly. Toru Iwatani was the designer (not Nakamura) of Pac-Man, Shigeo Funaki did the code and Toshio Kai the music. Nakamura was simply the man behind the company, not the father of Pac-Man." I agree that his company created Pac-Man and in a corporatized world, then as is now, the owner(s) get the credit; i.e., Jobs of Apple, etc. And "rewriting history willynilly"; as an historian I definately try not doing that. Happy computing. Murray :)

7 years, 2 months

For Sale: Computer & Electronics Magazines: Byte, Creative Computing, Pop. Electronics, More...

by sellam.ismail＠gmail.com

I have several pallets of many boxes containing oodles of computer and electronics magazines that need to go. I'm not sure what all is exactly there but I'm going to be digging through them over the course of the next several months, so I'll probably just continue to update this thread with new material. There may well be lots of complete runs of certain magazines, and probably some frustrating discontinuities from boxes that didn't make it over. In any event, there is a lot of good stuff. Here's what I have pulled so far: Popular Electronics, nearly a complete run from 1974 through 1984; also 1950s-1970s issues (uninventoried) Electronics Magazine, 3 bound volumes, April - December 1959 (see photo) - I plan to sell these in a complete set once I uncover all of them that I still have. It's possible I still have a complete run from the 1920s through the 1980s or so. PC World, Vol 1. #3 on upwards, incomplete (see photo). Dr. Dobbs, Volume 1, #2, photocopy of V1#1, many early issues from inception in mid-1970s thru... (again, this is just what I've pulled so far) Softalk, November 1982 onwards (incomplete, please see photos) Byte, January 1977 (Vol. 2, #1) through March 1983 (again, just what's been pulled so far, at one point I had maybe 5 complete runs of Byte) All photos can be seen here: http://s350.photobucket.com/user/Sel...ines/Batch%201 <http://s350.photobucket.com/user/Sellam_Abraham/library/Vintage%20Computer%…> I'll try to answer any questions as best I can. As a preliminary FAQ of sorts: 1. Yes, I will assemble bundles of magazines for different individuals upon request and ship them all at once. I will probably want some for of payment in advance though to secure the deal. 2. Yes, I will most likely ship via USPS media mail rate for the common stuff (this is how I received most of my magazines over the years) as this will be the cheapest method. For more valuable issues we can discuss more secure modes of shipping. 3. Yes, I have complete runs of a lot of magazines, but it will take time to dig them all out. I once had a complete run of nearly every (US) computer and electronics magazine ever published. What I now have is anywhere from a large to a substantial portion of that library. I don't know, this is the first time I'll be going through everything to see what's left. 4. These magazines have been stored in file boxes standing on their edges for years, packed very tightly. In not so tightly packed boxes some issues have curled up. In almost all cases, the magazines were kept in a cool, dry, dark environment so they will all be in about the condition I got them. In some cases I expect water damage. 5. I will charge more for the more sought after issues and peanuts for the long run schlock. My desire is to sell in bulk. The more you buy, the better your price. That should cover things for now. Happy shopping. Sellam FYI FWIW I cross-posted this from http://www.vcfed.org/forum/showthread.php?56035-Computer-amp-Electronics-Ma…

7 years, 2 months

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test-drb February 2017