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101090 discussions

System/3 on Ebay - How much isit really worth?

by dave.g4ugm＠gmail.com

So to continue the discussion, how much would these be worth as scrap in the USA? http://www.ebay.com/itm/151491089302 The asking price of $5k seems a tad high to me, so I can see it going to the crusher. Dave Wade G4UGM

11 years, 8 months

Still Alive?

by jhfinedp3k＠compsys.to

Still Alive - Test - Please do not respond!!!!!!!!!!!!

11 years, 8 months

M1705 dual 12-bit output info

by jnc＠mercury.lcs.mit.edu

> From: Kyle Owen > I've got a couple M1705 dual 12-bit output cards for the Omnibus. Does > anyone have schematics or programming information available? I checked > bitsavers, but I didn't see anything in the obvious places They're in the DEC Logic Handbook; in the 1976-77 edition, they are on pp. 227-231. If you can't find it online, Topline has one for sale cheap: http://www.ebay.com/itm/321490489267 If you really need it right away, I suppose I could crunch the book into my scanner and scan those pages. Noel

11 years, 8 months

Cyber ECL Wiring

by bpettitx＠comcast.net

Chuck Guzis wrote: "It didn't start with the 170, did it Billy? I remember a nice thick mat of twisted-pair wires on the backplanes of 6000s, as well as in a lot of attached controllers. Taper pin technology." You're right - the 170 was the first use of main frame wire wrap at CDC. I've never seen any other machine that used twisted pair wire wrap. When I left the project, they were trying to defelop a machine to automate the wiring. It was not going well. The earlier 6000, 7000 machines used twited pair with taper pins. Their wire mats were huge, more than 10 inches thick in some places. That was one of the problems they were trying to solve. Billy

11 years, 8 months

Fwd: is there any word processing software for the pdp11?

by jnc＠mercury.lcs.mit.edu

> From: Jacob Ritorto > I just got my Diablo 630 running and would like to couple it to one of > my pdp11s and an appropriate terminal to do more "inspired" writing and > correspondence. .. I sometimes get bored typing on these relatively > snazzy computers we have these days and wish to go back to the way > things were. Ah, got it. I don't know if (on the Unix path) nroff is any good for you; with a good macro package (pretty much essential; raw roff/troff is kind of like raw TEX), it's pretty easy to use. The thing is that 'back in the day', the whole 'WYSIWYG' editing model didn't exist until Bravo on the Alto. (At least, not that I know of - if anyone does know of such, I would love to hear of it.) Except for plain ASCII files, of course... So I'm not sure that if you're looking for 'text mode WYSIWYG', you'll be able to find much. > From: Warner Losh > There was also a TECO version available for the PDP-11's running RSTS/E > (and likely others) There was a 'visual TECO' running on the V6 Unix at MIT; that's what we used before the EMACS came along. I don't know the background of it, if it shares any history with the one you mentioned. >From the (slim) manual I have for it, it seems to have had both TECO mode (the usual TECO command interface, the stuff that looks like line noise), and a visual mode, just like primitive EMACS. (Probably only supported VT52's, though.) The latter mode had some built-in command keys, and there were also macro packages to extend it (again, just like primitive EMACS, although those for the PDP-11 Unix TECO were not as sophisticated). That's all almost certainly on the tape too, if anyone cares! :-) Noel

11 years, 8 months

M1705 dual 12-bit output info

by kylevowen＠gmail.com

I've got a couple M1705 dual 12-bit output cards for the Omnibus. Does anyone have schematics or programming information available? I checked bitsavers, but I didn't see anything in the obvious places, and without an option number (like DR8-E for the dual 12-bit I/O card, M863), it makes searching a bit more difficult. I'm hoping to have this controlling my Christmas tree lights this year if I can get something working. It has quite a number of jumpers, and although I can deduce a few must be addressing, I don't know what the others might be for. Any help would be appreciated! Kyle W4GNU

11 years, 8 months

VAX/VMS Software Source Book, 6th Edition (Oct 1990) PDF, Programming in VAX Fortran PDF

by mark＠wickensonline.co.uk

I've just scanned the 1000-odd page software source book for VAX/VMS, 6th Edition from October 1990, available from my scans page: http://wickensonline.co.uk/app/index.html#/scans This is a mammoth book (beware the 643MB download size!) but is a fantastic example of just how pervasive VAX and VMS were. It contains a comprehensive listing of software available for the platform both from DEC and independent software houses. Interesting personally is the indication of programming language used. I've also uploaded Programming in VAX Fortran (Sept 84): I wasn't aware of an online copy of this manual. It's a very handy guide to programming in Fortran that covers everything you'd need to get up and running with the language under VAX/VMS, including the use of EDIT, compiling, linking and debugging, as well as reference material on the language and supporting libraries. Enjoy, Mark.

11 years, 8 months

IC storage / anti-static foam

by bob＠theadamsons.co.uk

> I know this was discussed before but.... > > What are recommended methods for storing a variety of ICs where they > are easily accessible as needed, keeps them safe and for the long term? > Tubes are good if you can find them in any quantity now though they aren't so handy if like most folk you have a largish mix with only small numbers of each. I have a cabinet with antistatic plastic drawers for my MOS ICs and some of the bipolar with the rest of the bipolar in an ordinary styrene drawer cabinet. In my earlier days in the MOS industry before more specialised antistatic stuff became available we used to push them into a sheet of polystyrene wrapped with foil.

11 years, 8 months

Problem with DEC LSI11 / KD11-F

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > I checked all three M7270 modules I have here. ... I have, Rev. E, Rev. > H and Rev. K > ... All has date codes in the range 77-80. I expect your boards to be > later revisions. No (I think); mine are both K, too. One says "130 K" (that's the one with the slightly earlier chips); the other says "140 K". Anyone know what the numbers mean? Noel

11 years, 8 months

Nat Semi ns32k, was Re: Whitechapel Computer Works MG-1

by jnc＠mercury.lcs.mit.edu

> Eric Smith spacewar at gmail.com > Perhaps I'm mistaken, but I was pretty sure that the first UTek machine > was the 4404 "Artificial Intelligence Workstation", introduced in 1974. > The 4404 was MC68010 based There's also the TI Explorer: http://en.wikipedia.org/wiki/TI_Explorer a LISP machine (custom CPU); not sure of the exact date, but it was around then. Noel

11 years, 8 months

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