TUHS

tuhs@tuhs.org

30 participants
6496 discussions

by Fred N. van Kempen

Hi all, > No. The uVAX memory requires special PMI stuff (carried over those > ribbon cables) that the PDP-11 CPUs don't grok. At least, that's > what I've always been told. Correct. --f

21 years, 5 months

[pups] pdp11/73 memory

by Christos Papachristou

I recently found a cabinet with a MicroVAX II (in 2 BA23 enclosures) and quite a lot storage devices on it. I plan to replace the MicroVAX II CPU module (M7606-AA) with a pdp11/73 CPU module (M8192) . I only have a 512k RAM module (M8067LA) for the pdp11/73 . The microVAX has two quad height memory modules , but I haven't checked yet whether they are 1, 2 ,4 or 8 megs each (ie M7607,M7608 or M7609) .Is it possible to keep some of the MicroVAX memory modules if they are below or equal to 4 megs?

21 years, 5 months

Re: [pups] pdp11/73 memory

by Carl Lowenstein

> From: "Christos Papachristou" <chpap(a)ics.forth.gr> > To: <pups(a)minnie.tuhs.org> > Date: Fri, 12 Dec 2003 18:31:12 +0200 > Subject: [pups] pdp11/73 memory > > I recently found a cabinet with a MicroVAX II (in 2 BA23 enclosures) and > quite a lot storage devices on it. I plan to replace the MicroVAX II CPU > module (M7606-AA) with a pdp11/73 CPU module (M8192) . I only have a > 512k RAM module (M8067LA) for the pdp11/73 . The microVAX has two quad > height memory modules , but I haven't checked yet whether they are 1, 2 > ,4 or 8 megs each (ie M7607,M7608 or M7609) .Is it possible to keep some > of the MicroVAX memory modules if they are below or equal to 4 megs? No. MicroVAX memory uses a different interconnect scheme. It is not in the Qbus address space. carl -- carl lowenstein marine physical lab u.c. san diego clowenst(a)ucsd.edu

21 years, 5 months

trix src

by Al Kossow

Wesley, what I have of the sources is now up at www.bitsavers.org/MIT/trix You might try contacting Dave Goddeau or Steve Ward to see what else might still exist. Dave's MS thesis was on implementing an MP version of the Trix kernel.

21 years, 5 months

Re: Possible Trix source tape

by Al Kossow

> From memory, there wasn't that much to it at the time RMS was looking at it. what I should have said was there wasn't much done on Trix when RMS was looking at it.

21 years, 5 months

Re: Possible Trix source tape

by Al Kossow

I should have this on one of my backup tapes. If RMS is willing to send his tape to California, I have the equipment to read his. -- > It's interesting to consider what might've been if the GNU project > hadn't got behind on the Hurd, and got up-to-speed with Trix. -- If it wasn't tied up with Stanford licensing issues, the V Kernel would have been a more mature system than Trix. From memory, there wasn't that much to it at the time RMS was looking at it.

21 years, 5 months

32I: spl*() and paging up

by Pat Villani

A quick update. I have spl*() code as well as ia32 paging up in a small test kernel. More testing remains to be done before integrating into 32I kernel. Interrupt structure working well, as well as system call interface. Still need copyin(), copyout(), fubyte(), fuibyte(), fuword(), etc., as well as save(), resume(), etc. Future progress will slow down a little. I have accepted an adjunct teaching position, and will need to devote some otherwise free time to preparing lessons. I still expect to have a preliminary running kernel by New Years. Pat -- I've always found paranoia to be a perfectly defensible position. -- Pat Conroy

21 years, 5 months

[pups] Possible Trix source tape Was Fwd: Re: [TUHS] Re: AI LabLispmachine source code

by Wesley Parish

First, an explanation - I'm interested in exhuming the Trix kernel - written at MIT -, which for a while was to have been the GNU kernel, according to RMS and the official FSF histories: http://en2.wikipedia.org/wiki/GNU I've been in contact with RMS - pestering the poor hacker ;) - and he's told me he's got a tape that might have the Trix source on it, but he doesn't have a tape drive or enough time. I'm in NZ, which is a bit of a long way away from Mass., so I'm asking if anyone else in the vicinity is interested in seeing one of the earlier 7th Ed. clones to be written? I've got a number of reasons for wanting to read it - among them, the wish to compare with Minix 0.0 -, putting the ubiquity of Unix during the early 80s into perspective, and of course getting something to generalize any code I write for 32VI. So, if anyone's interested and in the vicinity, just get in touch with RMS and let him know you're interested and have the time. Thanks Wesley Parish P.S. It's interesting to consider what might've been if the GNU project hadn't got behind on the Hurd, and got up-to-speed with Trix. Jokes like "Who says you can't teach an old dog GNU TRIX?" spring immediately to mind ... ----- Forwarded message from Richard Stallman <rms(a)gnu.org> ----- Date: Mon, 01 Dec 2003 23:17:32 -0500 From: Richard Stallman <rms(a)gnu.org> Reply-To: "rms(a)gnu.org" <rms(a)gnu.org> Subject: Re: [TUHS] Re: AI Lab Lispmachine source code To: Wesley Parish <wes.parish(a)paradise.net.nz> In this context it means, getting someone in the appropriate community who's interested, around to check up on the tape. Ok. I have the tape here. ----- End forwarded message ----- "I me. Shape middled me. I would come out into hot!" I from the spicy that day was overcasked mockingly - it's a symbol of the other horizon.

21 years, 5 months

RE: [pups] Mini UNIX (V6) and V7 tapes found

by Fred N. van Kempen

All, I wrote: > Looks liek I ran into a bunchof really old and useful tapes > here. Two tapes come from Bell Labs, and seem to contain the > official Mini UNIX (Sixth Edition) and the official UNIX, > Seventh Edition. Hmm. Well, the V7 tape is saved... took a bunch of retries, but I managed to grab all of it. The V6 (Mini-UNIX) tape was OK, but some !$%(!@#$%@# must have run out of blank tapes, and decided to use this one.. it contains binary data. Major bummer, sorry :( Still working on the 2.8BSD tape, which needs more work. I also have to work on Christian Corti's tapes.. now that I have a working 800bpi SCSI drive, I actually *can* :) [thanks Walter!] Images will be sent off to the PUPS archive. Cheers, Fred

21 years, 5 months

UNIX v7 projects

by Hellwig.Geisse＠mni.fh-giessen.de

Hi all, I thought that you possibly could be interested in two projects, a small one that I did over a year ago and a more recent one, which is currently under active development. In order to become acquainted with the old UNIX sources as well as the behaviour of such a system running on old (but simulated) hardware I figured out how to feed Keith Bostic's original v7 tape images into Robert M. Supnik's PDP-11 simulator so that the original bootstrap procedure (described in "Setting Up Unix - Seventh Edition") could be carried out exactly as written. In addition to that I wrote a little program which traverses the root directory of the simulated disk and extracts its contents recursively (creating the same structure and files in the host's file system). I copied all the needed software and a HOWTO into a distribution package which can be found at http://telexx.mni.fh-giessen.de/PDP11-UNIX I did this little project as a "warm-up" for another and quite a bit bigger project: porting UNIX Seventh Edition to a modern RISC-like microprocessor (named ECO32). This processor and a few peripherals are simulated for now, but we intend to transform it into real hardware (we are thinking of an FPGA implementation). These of course are dreams of the future; what we have already is this: - an ECO32 simulator - an ECO32 back-end for the LCC compiler - an ECO32 assembler/linker/loader - a UNIX 7th Edition kernel ported to ECO32 We are working on a port of many of the commands; the standard library and the shell are ready and waiting to be integrated. The homepage of this project is http://telexx.mni.fh-giessen.de/ECO32 You are welcome to download the project in its current state; don't expect anything user friendly though ;-) If you have any questions regarding these two projects, feel free to ask. - Hellwig

21 years, 5 months

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TUHS