test-drb

test-drb@ccmp.vtda.org

101090 discussions

by feldman.r＠comcast.net

>Message: 6 >Date: Thu, 7 Mar 2013 09:43:21 -0800 (PST) >From: Fred Cisin <cisin at xenosoft.com> > >So, is it a flat spiral or a helix? >Either one at 10" diameter is an impressively long scale, for a LOT of >accuracy! It seems like it would be physically impossible to make a flat spiral _SLIDE_ rule (where one scale can be repositioned against another scale). The Computer History Museum has a spiral slide rule (http://www.computerhistory.org/collections/accession/102633252), but it is not clear from the picture if the scales _SLIDE_ against each other. In a spiral, the area of a segment that as one degree wide by one spiral line to the next decreases as one goes toward the center, so a slide would bind if you tried to turn it toward the center or would be loose and not evenly contact the next band if you turned it away from the center. In an earlier post in this thread, someone said that they had not used their slide rule in anger. As a kid, I made something that would have been useful if they had wanted to. I took a cheap wooden slide rule, lightly sanded the groves, waxed the slide, and wrapped four big rubber bands along the length, so one end was on the outer part at one end and the other end was on the slide. Worked sort of like a cross bow or spear gun. I could send the slider through 6 layers of corrugated card board at about 20 feet! Bob

13 years

Burroughs adding machine

by jules.richardson99＠gmail.com

Any early Burroughs experts here? Yesterday I discovered a Burroughs "Style no. 3" adding machine in a junk/antiques store (the kind of wonderful store where you have to dig through stuff to get to more stuff, and when you get to that there's even more stuff underneath/inside it :-) Anyway, it's got the pedestal, side-desk and printing mechanism (at least I assume that the gubbins at the back is a printer, although I couldn't immediately see how it transfers to the paper - poss. just not visible with the platen in the way). It seems to be basically the same as this one: http://www.fi.edu/learn/sci-tech/adding-machine/adding-machine.php ... except: 1) it doesn't have the row of red/white keys across the top, 2) the desk on this one is much larger/nicer, 3) there's no ornate Burroughs script at the base of the keyboard area; instead it says "Burroughs" and "center of type" above the keyboard, 4) the backing to the keyboard seems to be black (not green) 5) the keytop for the lower-left key on the keyboard is red (and a little larger), not metal. The mechanism seems free and cosmetically it's in pretty good shape, considering that it's probably pushing 100 years in age - the main drawback is that it's missing one of the '2' keys (the R/H side glass is cracked and the rubber pads at the top of the pedestal have disintegrated, but both of those problems should be solvable). Immediate questions: 1) Any idea of age? s/n is 27434. I'm leaning toward 1906 as that seems to be when the no. 3 showed up, and by October of that year there had been some 40,000 of them built - but that's assuming that the serial numbers don't carry across all models. I'm surprised if they built that many of them before they were rendered obsolete by a newer model, though. 2) The lack of '2' key is really the main thing stopping me from bringing this thing home. I expect they're common to many early Burroughs machines; is anyone known to carry parts from junk machines, or has anyone succeeded in creating a reproduction key using modern materials? cheers Jules

13 years

MPX-16 (Was: BS about "changes in cost of cheapest machines"

by rampaginggreenhulk＠yahoo.com

------------------------------ On Fri, Mar 8, 2013 11:59 AM PST Chuck Guzis wrote: >On 03/07/2013 11:34 PM, Chris Tofu wrote: > >> Okay, I've got the schematics for the Explorer 88/PC (Netronics R&D, New >> LItchfield, Conn), which uses an 8250 for async, has a separate keyboard >> and cassette interface. No video as far as I can tell. >> >> Would you consider sharing these with your down trodden brothers in the community who've had to go without? > >Google Is Your Friend. Look at the ad on page 4 of this PDF: > >http://www.thecomputerarchive.com/archive/Magazines/Kilobaud%20Microcomputi… > >Netronics marketed a variety of kits--the original Explorer, which I believe was a Z80 box, the Explorer 85, which was an 8085 box and the Explorer 88/PC. Looking at the prices is somewhat germane to the original topic. Can you imagine spending $250 for a floppy controller card or $300 for a keyboard? > >Marcus has some "Blue Seed" stuff on his site: > >http://maben.homeip.net/static/S100/IBM/5150%20PC/blue%20seed%20IBM%20Mothe… > >--Chuck I'll check it out. Thanks for getting back. So many find my "condition" offensive. A lot of people indeed do have a problem with people's problems. I'm doing my best to address the logorreah (and my poor spelling). But Hashem it's not like it's halitosis! I feel so isolated. As long as Top Gunner doesn't consign me to the iggy bin I feel I'm making progress. I have a lot of interest in sbc's. I wish I knew how to better research them, in particular the quasi mythical millions of 80186/80188 based embedded controllers. I walked into a place in Bohemia Long Island many years ago and they were manufacturing just that. Apparently a great many small companies were doing just that -

13 years

MPX-16 (Was: BS about "changes in cost of cheapest machines"

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Mar 7, 2013 4:26 PM PST Chuck Guzis wrote: >Okay, I've got the schematics for the Explorer 88/PC (Netronics R&D, New >LItchfield, Conn), which uses an 8250 for async, has a separate keyboard >and cassette interface. No video as far as I can tell. Would you consider sharing these with your down trodden brothers in the community who've had to go without? >I also have an ISA card with 6 banks of 4164s and an Intual DUART on it. > >And I recall the "Blue Seed" kits. Please expound. >Lots of interest in the early PC, apparently. Aye. >--Chuck >

13 years

BS about "changes in cost of cheapest machines"

by mtapley＠swri.edu

At 18:11 -0600 3/7/13, <cctalk-request at classiccmp.org> wrote: > > I decided that way because that price beat Ciarcia Circuit >> Cellar's price for a *kit* for an 8086 SBC, > >"Micromint SB180??"? (PC compatible 9 slot) >I built one of those. Don't remember the exact name (MPX-16 from later posts), but pretty sure that's the system! Fred, you are positively the Man; that is totally awesome! How did the board work out? One of my few computing regrets is never getting to play around on that machine, although I love the Mac. I did get a Rainbow 100B years later, so I got as much of MS-DOS (3.10b) as I wanted. Decided I liked CP/M 80/86 better, and the Rainbow did that too. -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

13 years

BS about "changes in cost of cheapest machines"

by mtapley＠swri.edu

At 3:22 -0600 3/7/13, Fred wrote: >1985 Mac ~$3000 >1985 Mac using scrounged stuff ~$3000 - NOT AN OPTION. >1985 Mac bare ~$3000 (Macintosh was not amenable in the 1980s to cutting True in general, but my Fat Mac in about 1985 [1] cost ~$1500 (new) including University of Texas' academic discount (I was a student). I decided that way because that price beat Ciarcia Circuit Cellar's price for a *kit* for an 8086 SBC, and the 68000 looked more powerful to me than the 8086. I mistakenly thought that I'd be writing most of my own software in either case - and I've yet to really learn any assembly language. I totally misjudged the development of MacOS and applications, or the speed at which MS-DOS' hardware requirements would advance ... Anyway, my point is that exceptions to Apple pricing did exist, and were (at least in my case, though not necessarily for the right reasons) decisive. [1] I was going to say, "I still have it", but on thoughtful consideration, I guess I only still have the bottom and front bezel of the case and the CRT. Power supply re-built, logic board upgraded to Mac Plus which required replacement of case back. Not too sure about the frame - is that the same between a Plus and a Fat Mac? I still have the mouse and keyboard and power cable. -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

13 years

MPX-16 (Was: BS about "changes in cost of cheapest machines"

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Mar 7, 2013 3:19 PM PST Fred Cisin wrote: >http://books.google.com/books?id=zQWNinpbFx0C&pg=PA120&source=gbs_selected_… >p158 Just how compatible was this thing? Did the article make any references to vid? I must assume the bios was supplied by phoenix or someone -

13 years

Personal Computer Museum of Brantford, Ontario in today's National Post!

by pet4032＠gmail.com

http://business.financialpost.com/2013/03/07/vintage-computer-museum-aims-t… The National Post is a national Canadian newspaper with a circulation of 144,116. Personal Computer Museum site: http://www.pcmuseum.ca/ If you are ever up in the Southern Ontario area, it is a must visit! Cheers, Bryan

13 years

Did Dave Dunfield's cp/m archive on classiccmp.org go boom ?

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Mar 7, 2013 1:27 PM PST mc68010 wrote: >None of my links are working anymore. Just gives a 503 error. I need me some disk images. Apparently no one has heard from Dave in a while.

13 years

BS about "changes in cost of cheapest machines"

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Mar 7, 2013 12:57 PM PST Chuck Guzis wrote: >On 03/07/2013 12:42 PM, Fred Cisin wrote: > >> It had NINE slots, with the alternate ones spaced the same as the 5150, >> thus permitting 5150 case if you didn't need bracket on four of them. >> But, the UNUSUAL part about it was that it was designed to work from a >> terminal, instead of PC style keyboard and screen. That apparently didn't >> work out, so he came out with a keyboard ISA card. (to make the machine >> forgettable) > >I have a booklet of schematics for a very similar kit, but I don't think the name is "Micromint". Also, wasn't the UART something like an 8274, rather than an 8250, shared with DRAM on an ISA board? > >--Chuck The articles appeared in BYTE, was even on the cover of one issue. An individual gave away one on this list a few years ago (took a minute, Rich Cini).

13 years

BS about "changes in cost of cheapest machines"

by rampaginggreenhulk＠yahoo.com

13 years

Keyboard with skull and crossbones key (U11)

by barythrin＠gmail.com

Anyone know what keyboard this is/was and if it was really standard? One of the dudes collecting stuff at Electronics Plus last weekend I think got it for a collector friend who's on this list. There were two of the keyboards, obviously from some government terminal/system but only one had the key. On top it was a skull and crossbones but on the user facing side it I believe said U11 as with most of the keys up there so it seemed legit. Thought it was funny but can't find much mention of it out there. Alternatively if you have it and have a pic somewhere I'd love to see it again :-) - John

13 years

TOSEC on archive.org

by barythrin＠gmail.com

Its the actual programs offered or just the list of known apps?

13 years

Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Sat, Mar 2, 2013 3:45 AM PST Alexander Schreiber wrote: >On Fri, Mar 01, 2013 at 09:36:24PM -0800, Chris Tofu wrote: >> Well, back then the internet was a much more open, trusting environment. >> >> And even back then, _proper_ system setup safeguards (limiting access to >> rsh/rlogin, enforcing strong passwords, ...) could have severly limited >> the spread of the worm. >> >> C: Not to mention that probably every internet host on planet earth was running UNIX. > >No. There were plenty of other systems, among them VAXen with VMS and >others. okay that is a good point. but I'm sure all those were still woefully in the minority >> ??? Was the worm supposed to attack Commie 64s? Coco's? Those vile Timex Sinclairs? > >If you'd bothered to read a bit, you'd know the anser. the answer to what Alex. whether the worm would attack car Commies, Cocos or Sinclairs? I already know that answer thanks. >Kind regards, > Alex. >PS: Fix your quoting, having to repair it is annoying. >-- >"Opportunity is missed by most people because it is dressed in overalls and > looks like work." -- Thomas A. Edison

13 years

Temperature scales (was: Re: Slide Rules)

by mtapley＠swri.edu

On 5 March 2013 22:30, Tony Duell <ard at p850ug1.demon.co.uk> wrote: >Actually, for practicla purposes 10 is a very inconvenient base for a >measuremtn sytem becuase it has so few factors. ... >Not me!. Assuming you mean pure water at normal atmospheric pressure >I'll have 273.15 for freezing and 373.15 for boiling. Wouldn't you *really* rather have, say, *144* degrees between freezing and boiling, or maybe between absolute zero and freezing? I mean, if 10 is an inconvenient base, 10^2 has all the same problems twice over... :-) P.S. At 1:29 -0600 3/6/13, Arno Kletzander wrote: >Now that's the bad news, This Is America (and across a large body of >water from my POV). Hm. I'm thinking we should start taking up a collection to purchase a transatlantic-capable yacht for Will Donzelli ... (more :-) ) -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

13 years

TOSEC on archive.org

by geneb＠deltasoft.com

TOSEC, The Old School Emulation Center archives are now on archive.org. There's a lot of interesting stuff in the collection. Check it out: http://archive.org/search.php?query=collection%3Atosec&sort=-publicdate Capsule descriptions are needed for the various collections - if you can help, join the #iatosec channel on any efnet IRC server. tnx. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://www.scarletdme.org - Get it _today_!

13 years

DEC and non DEC disk packs

by useddec＠gmail.com

Still digging for several requests for parts, and have found some packs I don't need. 5- RK07K-DC Some have labels on them including XXDP, but I have no way of checking them. I think there is one RK06 pack left also. 2- RA60-P Used, no idea what is on them. 1- RA60-P Looks new , sealed in plastic bag with some cutd in the bag. 2- 80MB Looks like RM02/03, CDC9762 packs No other numbers found yet 1- CDC883-51 CE pack 1- CE pack, looks like RP06, or al least that size. No other numbers found yet. All untested, if interested, please contact me off list. shipping from 61853, IL Thanks, Paul

13 years

BS about "changes in cost of cheapest machines" (Was: Raspberry

by rampaginggreenhulk＠yahoo.com

------------------------------ On Wed, Mar 6, 2013 6:02 PM PST Fred Cisin wrote: >> >I think in addition to cctalk and cctech, we need a third list - ccrant? >> ...or cccranks... > >Ok, Ok. > >cclogorrhea Sure why not. But it takes logorrheic to know one. Maybe there's an equivalent 12 steps....

13 years

BS about "changes in cost of cheapest machines" (Was: Raspberry

by rampaginggreenhulk＠yahoo.com

------------------------------ On Wed, Mar 6, 2013 5:33 PM PST Ian King wrote: >I think in addition to cctalk and cctech, we need a third list - ccrant? >-- Ian ...or cccranks...

13 years

Assorted books FFS

by dgriffi＠cs.csubak.edu

I have some books that I'd like to get rid of for cost of shipping plus maybe a beer. It should be around $5 for anyone in the US. *Instructor's Manual for Problem Solving and Programming in Fortran 77 (3rd ed) by Cunningham *UNIX Primer Plus by Waite Group Staff (1983, Softcover) *Introduction to WordStar by Arthur Naiman (1983, Paperback) *WordStar with Style by Roger White (1983, Paperback) *The Illustrated CP/M WordStar Dictionary with MailMerge and SpellStar *Word Processing on the Kaypro by Peter A. McWilliams (1983, Paperback) -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

13 years

Printer collecting [Was: Laserjet fuser rollers - cleaning]

by Arno_1983＠gmx.de

On 03/02/2013 04:52 PM, Mr Ian Primus wrote: > Speaking of old LaserJets - does anyone aside from me collect them? > I've got a decent collection older models, although somehow I don't > have a LaserJet II or original LaserJet. I do have the oddball 4V > though. Yep, I have to admit that I also collect printers, and not just one series at that... I do have some rather common models as "workhorses" (NEC P2200, LJ3, LJ4, -L, -M plus) or because I was given them and couldn't bring myself to throwing them out yet (far too many HP, Epson and Canon inkjets) but tend to focus on exots and niche models otherwise - NEC CP7 and Star LC24 with their multizone color ribbon, Citizen Overture and Sharp JX lasers which very visibly are early copier descendents, two OKI linear LED array printers, one of the infamous Tektronix "edible solid ink" power-hogs (a 340 I think; wish I could scrounge up a few reasonably priced ink sticks for that one, hint hint!), the "professional" HP Deskjet 1200 and 1600 models. Also three thermo-transfer units for various print sizes (all made by Mitsubishi, I think, two of them large flat things close to 19" format, one smaller desktop unit), which while primary intended for video still printing, also have parallel in! terfaces, but with consumables prohibitively costly for any kind of operation). What I'm missing yet is a "real" daisywheel printer (I have both a Triumph-Adler and an IBM typewriter with bolt-on interface boards - not that I would mind having a Diablo terminal at some time too), any sort of High Speed Printer from the olden days (drum, chain, belt, shuttle, or single-line needle) or truly esoteric stuff like the (DataProducts) hydraulic driven needle printer our local university collection has. Happy printing, guys! So long, Arno

13 years

My NEC PC-8201a on YouTube

by terry＠webweavers.co.nz

Another of my vintage computers on YouTube. This time that lesser known sibling of the TRS-80 Model 100, the NEC PC-8201a. http://youtu.be/d6z6nzzXlUQ It was the second computer I owned! Terry (Tez)

13 years

UNISYS line (band) printer FTGH

by n8uhn＠yahoo.com

No Worry's Arno, i list this printer once a year or so for the last two years. i will sit here, taken care of, till someone does get it (no scrappers!) the only reason i grabbed years ago it is because i like watching band printers in action and it has the centronics option and the standard unisys port. these days, when needing to keep text from a radio decoder or procomm, i save it digitally on the same pc that is running the app so no need to run reams of fanfold through a line printer. Bill >Let's hope it finds a good home anyway. I've still got an option on a >Centronics Linewriter LW800 band printer or a Siemens 9045 shuttle >printer which might become available locally and I should reserve my >space in case I need to rescue _that_. >So long, >Arno

13 years

UNISYS line (band) printer FTGH

by Arno_1983＠gmx.de

Bill Allen Jr <n8uhn at yahoo.com> wrote: > I have a dishwasher sized unisys 9246-7 line printer to give away (...) Sounds great, w/manuals, Centronics being pretty much universal and such. > the printer is located in Alpena MI 49707. Now that's the bad news, This Is America (and across a large body of water from my POV). I once succeeded in having some moderately large piece of equipment (two Aries Research tower machines, which are Sun clones, posted and given away by Sellam) hauled overseas, but that was only because I knew Hans Franke of VCF Europe fame, who had a whole container-load of stuff assembled for shipment over here back then. I don't suppose there is something similar going on at the moment, seeing the overall economic situation? Then I'm probably out of luck here. > with all the talk about printers and the person posting possible pick up > of old gear along his travels, i thought i's post this printer again - i > need the room :) Let's hope it finds a good home anyway. I've still got an option on a Centronics Linewriter LW800 band printer or a Siemens 9045 shuttle printer which might become available locally and I should reserve my space in case I need to rescue _that_. So long, Arno

13 years

RS-80 Model 200 memory

by fjkraan＠xs4all.nl

> Hi, > > I have recently received and repaired a TRS-80 Model 200 machine. Woot! > > My query is if anybody has any experience in adding extra memory - I note > that it has some sockets under it for memory expansion, but the recommended > devices are 24k (A ceramic carrier with 3 x 8K chips and some decoding - > Has anybody had experience using 62256 or similar parts? > The M200 reference manual has a diagram of the RAM module. It is just three 8kx8 RAMS and a 74LS138. So with a conversion socket, a 32kx8 RAM will probably work too. http://electrickery.xs4all.nl/comp/m200/doc/TRS-80_Model-200_reference-manu… This type of caramic devices was core business for Kyocera, which made the M100 line of computers. Fred Jan

13 years

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb