- test-drb@ccmp.vtda.org - classiccmp.org

Commodore calculators was RE: Calculators

by rampaginggreenhulk＠yahoo.com

------------------------------ On Sun, Mar 3, 2013 6:16 PM PST COURYHOUSE at aol.com wrote: >we have one com. calc like this one in photo >in calc case at museum > >_http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html_ >(http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html) > >ed - www.smecc.org congratulations Ed. that is unquestionably the funkiest ugliest calculator I personally have ever seen. Egads.

13 years, 5 months

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Anti-Virus

by rickb＠bensene.com

Good morning, Good progress was made yesterday with the Anti-Virus. The Windows 2003 server software was reloaded in "repair" mode on the server. Then the new server-side anti-virus was successfully installed and is running properly. All files on the server are now properly protected. The Email anti-spam and anti-virus was also updated successfully. The only thing that remains is to push the new version of the anti-virus software to the desktop computers. That is something that I'll be working on this evening. Please still remain vigilant about websites and Email until the workstation software can be updated on each of your computers. The risk is greatly reduced with the Email anti-virus running, as well as the anti-virus running on the server, but there still exists some risk of a desktop computer getting infected, so please be careful. I expect that I should have the new version rolled out to the desktop computers this evening. Thank you, -Rick B.

13 years, 5 months

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Memorex/Telex keyboards

by sales＠elecplus.com

We found the following old keyboards this Saturday, buried in the keyboard room. Memorex/Telex 122 key 211292-002 or 952563-001, qty 13 complete Telex, no part number, qty 2, std XT 5-pin DIN, 10 function keys on the left, numeric keypad on the right. 1 is missing the spacebar. No way to test these, sold as-is. Make offers? Cindy Croxton _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2899 / Virus Database: 2641/6146 - Release Date: 03/03/13

13 years, 5 months

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Commodore calculators was RE: Calculators

by COURYHOUSE＠aol.com

Message: 27 Date: Sun, 03 Mar 2013 21:55:28 -0500 From: Dave McGuire <mcguire at neurotica.com> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: Commodore calculators was RE: Calculators Message-ID: <51340D20.5030509 at neurotica.com> Content-Type: text/plain; charset=ISO-8859-1 On 03/03/2013 09:42 PM, Chris Tofu wrote: >> we have one com. calc like this one in photo >> in calc case at museum >> >> _http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html_ >> (http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html) >> >> ed - www.smecc.org > > congratulations Ed. that is unquestionably the funkiest ugliest calculator I personally have ever seen. Egads. > Maybe it's just me, but I think it's AWESOME. > -Dave -- >Dave McGuire, AK4HZ >New Kensington, PA I LOVE THE CLUNKY OL' THING! Really need to find some data on it! Someone gave it to me as a gift fro the computer display we had back in the 80s at our computer business and it moved over into the museum side of things now! Does anyone have data on it!? Ed# _www.smecc.org_ (http://www.smecc.org)

13 years, 5 months

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Commodore calculators was RE: Calculators

by rampaginggreenhulk＠yahoo.com

Did Commie make only one? I have one, don't ask me the specifics. White keys, some red, some blue IIRC. Green display IIRC. 1000$ to the first/last bidder (make that a Pay it Right Now). Mostly for the distinct pleasure of exhuming it from my time capsule. Alright I'll take 950$. I'm not a hard man.

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:38 AM PST Tony Duell wrote: >It has been said that now that calcualtors are everywhere, kids do not >need to leanr how to do long multiplication and division. I am nto sure I >accept that (given that long multiplciaton and division have applciations >in manipulating agebraic expresions too). But I am convinced that if you >are goign to assume that clacualtors are everywhere you should teach kids >why said calculators do not always give the right answers and how to >avoid such problems. > >-tony When I was in hs, calculators weren't seen until or 12th grade. When it was impractical and too time consuming to work out every log, trig function, or laborious arithmetic operation. Kids have been bringing calculators to school for 2 decades probably, and I for one see that as a travesty.

13 years, 5 months

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Commodore calculators was RE: Calculators

by COURYHOUSE＠aol.com

we have one com. calc like this one in photo in calc case at museum _http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html_ (http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html) ed - www.smecc.org

13 years, 5 months

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Commodore calculators was RE: Calculators

by rampaginggreenhulk＠yahoo.com

>> _http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html_ >> (http://www.burninghorizon.com/gallery2/v/cons/eccc2010/DSCF1042.jpg.html) >> >> ed - www.smecc.org >> >> congratulations Ed. that is unquestionably the funkiest ugliest calculator I personally have ever seen. Egads. > > Maybe it's just me, but I think it's AWESOME. > > -Dave But it doesn't even look like a calculator. Far more like a phone. Uniquely horrible. That's not a bad thing though. Don't get the wrong idea.

13 years, 5 months

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Calculators

by jgessling＠yahoo.com

This leads me to my belief that I was the last slide rule teacher.? In 1975, in Ghana, I was teaching A level math as a Peace Corps teacher.? We had a whole section on slide rule calculations.? Thanks to some agency, I think UNICEF, we had one of those 6 foot long rules that mounted at the front of the class.? The kids really caught on quick and it was a lot of fun.? Especially as the students figured out other things they could do. Regards, James?

13 years, 5 months

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IBM Model F DIN connector repair

by mbbrutman-cctalk＠brutman.com

I have two Model F keyboards (original PC or XT) that have gone bad due to an intermittent connection in the DIN connector. I'm not sure how these were originally assembled, but in the mode of failure that I have the pins (embedded in the round black plastic that spaces them) come out of the rubber sleeve. Pressing tightly restores connection for a little bit, but it is not really usable that way. Finding the DIN plug is not a problem. But I really don't want to hack off the end of the cable with the nice molded IBM plug. These are not museum pieces, but I'd like the repair to be unobtrusive. Has anybody else run into this problem and attempted a fix? I'm also open to just replacing the cord entirely, but I doubt that there is a surplus of originals laying around anywhere. Mike

13 years, 5 months

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Slide Rules (was: Calculators)

by rampaginggreenhulk＠yahoo.com

------------------------------ On Sun, Mar 3, 2013 11:17 AM PST Mark Tapley wrote: >James (and Chris), > I graduated in 1980, McCallum High School, Austin, Texas. We had a slide rule team, with a coach. In addition, my Biology and physics teachers all let me use slide rule for all homework and tests, giving me credit if my answer was within about 0.5% or so. Dunno whether that counts, but if so would push the date out to 1980. > I did get a TI-59 (still have it, sticky keyboard and I'll bet the card reader doesn't work) middle of my senior year. That was a pleasant culture shock... > I don't know that I ever saw one of the six-foot-long "supercomputers" :-) . > >At 20:07 -0600 3/2/13, <James> wrote: >> This leads me to my belief that I was the last slide rule teacher.? In 1975, in Ghana, .... > >-- - Mark 210-379-4635 I think I was required to get a scientific calc in 12th grade (pre-calc, uh, why does that designation not seem right?). Or maybe it was just strongly suggested. Obviously it made sense at that point. Mine was a horizontal Sharp thingamabob. It wasn't the real high end model/s, designated PC-n by Radio Shacj IIRC. I broke the lcd years later, though I could hack in a replacement, but I can't find it. Only the brown plastic slide in case. Cost about 40$. >----------------------------------------------------------------------- >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, 5 months

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Raspberry Pi & Electronic devices and such - calculators, microcomputers & more

by c.murray.mccullough＠gmail.com

R. Fogarty writes: ? Knowing how to program a computer may seem like a far-fetched dream for ?ordinary? people. After all, don?t you have to be some kind of genius to manipulate the will of a machine and have it do your bidding?? Well, with Raspberry Pi, no! And most beneficial of all you?ll be in geek heaven. What better way to understanding Big Data today and having a fond and respectful remembrance of classic computing of yesteryear. Or maybe as C. Zarin writes: ?We learn more than we ever wanted to know about things we wish we?d never heard of.? I hope this never comes to pass when it comes to classic/vintage computing. Murray--

13 years, 5 months

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Sharp EL-5100 was Re: Calculators

by rampaginggreenhulk＠yahoo.com

I wanted Josh to be proud of me. I searched out vintage sharp calcs on ebay, not Google/Lord Goozitsu. Mine was the EL-5100. Was nice. Wish I could find mine. Only got the brown case, which is cracked. But so is Josh. Is ebay the new Google/Goozitsu?

13 years, 5 months

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Slide Rules (was: Calculators)

by tdk.knight＠gmail.com

slide rules eh? jefferson cr1 and cr2 and the other has fuel and speed time distance direction http://img51.imageshack.us/img51/652/dsc9760v.jpg http://img62.imageshack.us/img62/8297/dsc9759.jpg

13 years, 5 months

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anyone got a TRS-80 model 4P for parts/repair?

by rampaginggreenhulk＠yahoo.com

preferably not on the west coast.

13 years, 5 months

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DEC TU10 rack (empty) / DEC VT52 available

by jdr_use＠bluewin.ch

Available, for free : empty DEC TU10 rack, with backdoor and sidepanels, in very good condition. Not free : make offer for a fully functional VT52 terminal, a functional Apple III ( with screen and external floppy ) is also slowly looking for a new home. Location : Zurich Switzerland. no shipping, but i do travel throughout Western Europe from time to time. Jos Dreesen

13 years, 5 months

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Laserjet fuser rollers - cleaning

by jules.richardson99＠gmail.com

Came home with a dumpster-find Laserjet 4 (with jetdirect board) yesterday. Self-tests OK but prints with some minor repetitive ghosting on the pages (it has almost a million pages on the clock). There's some baked-on toner on the fuser roller which might[1] (most probably!?) be the culprit, but gentle cleaning doesn't seem to get rid of it; question is, how aggressive can I be with it? I don't know if the blue-gray color is just a thin coating of something magical, or if it's a hunk of solid metal which can be scrubbed. [1] it was pretty filthy inside, but I stripped everything down around the fuser and toner areas and cleaned everything there. I've not flipped the thing over to check underneath yet, but I'd expect dirty rollers to cause feed problems if anything, not image problems. As it stands it's perfectly fine for home use doing stuff such as printing out things from bitsavers, so I don't want to make it worse - but OTOH it'd be useful as a general-purpose printer if the image problems were fixable without pouring a bunch of cash into it. cheers Jules

13 years, 5 months

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Shameless Classic Parts Trafficking Redux (M88K)

by ittybittybytes＠gmail.com

Shameless Classic Parts trafficking Redux More Stuff from the shed.to Ebay DG Aviion M88K 251238413863 HEUKIRON 86K VME 251238419401 Sparc LX 251236748206 DEC VAX VXT 2K+ 251236734890 DEC Alpha Station 200 251237885752 DEC Vax 4000/300 251236580530 As always, if you tell me (before I ship) that you are a part of the list, I throw in some freebies. And to all you Hosers, I can now ship to The Great White North (Canada) :

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Sat, Mar 2, 2013 3:08 PM PST Ian King wrote: >Would this thread please die? What we've learned from this interminable, >er, "discussion": > >Tony doesn't like RPi. Not surprising, it seems Tony doesn't like much >beyond early HP calculators, and only if misspelled. (Note: what's >generally considered the first "real" spell checker was created in 1971, >on the PDP-10 at SAIL. Early work goes back to the late 1950s/early >1960s. Is that sufficiently vintage?) > >Some people are very confused about computer security. > >Some people are very confused about computers that don't run MS-Windows. >Really, they exist, and many of them are quite useful. Some of them came >before MS-Windows. I can point you at some books about this. With >pictures, if needed. > >And... that seems to be about it. Can we move on, please? -- Ian Some of the conclusions you claim to have drawn perfectly illustrates why these discussions accomplish zilcho. People get lost in the morasse, ie can't focus, are overly idealistic, and are just prone to hallucinate. As a parting though (imagine that!) there actually is merit to Richard bringing up the focus of the first worm. Besides the internet was, is and likely always will be dominated by UNIX based servers, UNIX and it's derivatives aren't immune from attacks. It's just that generally, I feel, they're the target of more sophisticated exploits, as opposed to every script kid wanting to bring down Windoze boxes.

13 years, 5 months

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Calculators

by rampaginggreenhulk＠yahoo.com

So typically what age were you allowed to use these in school? It stands to trump my argument if it was young enough. What's the difference between a calculator and a slide rule from one perspective? ------------------------------ On Sat, Mar 2, 2013 10:54 AM PST James Gessling wrote: >This leads me to my belief that I was the last slide rule teacher.? In 1975, in Ghana, I was teaching A level math as a Peace Corps teacher.? We had a whole section on slide rule calculations.? Thanks to some agency, I think UNICEF, we had one of those 6 foot long rules that mounted at the front of the class.? The kids really caught on quick and it was a lot of fun.? Especially as the students figured out other things they could do. > > >Regards, James? >

13 years, 5 months

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early CAD

by dave.thearchivist＠gmail.com

While cataloguing today I came across a mention of a drafting system a google and see page 11 of www.dtic.mil/dtic/tr/fulltext/u2/694647.pdf What I have is in a collected articles type of book Topics in Electronics, microwave electronics, space technology, avionics radar transportation, laser interferometry, automatic drafting vol VIII 1967 http://www.collection.archivist.info/searchv13.php?searchstr=bk3270 Dave Caroline

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Sat, Mar 2, 2013 3:52 AM PST Alexander Schreiber wrote: >> On Fri, Mar 01, 2013 at 09:34:10PM -0800, Chris Tofu wrote: >> > >> > >> > >> > >> > ________________________________ From: Alexander Schreiber >> > <als at thangorodrim.de> To: General Discussion: On-Topic and Off-Topic Posts >> > <cctalk at classiccmp.org> Sent: Friday, March 1, 2013 8:07 PM Subject: Re: >> > Raspberry Pi >> > >> > On Thu, Feb 28, 2013 at 11:40:48AM -0800, Chris Tofu wrote: >> > > >> > > >> > > ------------------------------ On Thu, Feb 28, 2013 11:04 AM PST Allison >> > > wrote: >> > > >> > > >On 02/28/2013 11:45 AM, ben wrote: >> > > > >> > > > That "low price is best trend" I would change. For me a modern >> > > > programing tool is "text editor" and 80x24 text screen on 15" display.? >> > > > Explain to me why a cheap PC in my home can't keep up to the net >> > > > (windows 7) and a credit card computer can do better for surfing.? Ben. >> > > > >> > > > >> > > >Simple task specialization, and task overhead limiting.? That and in7 is >> > > >just a bigger pig. >> > > > >> > > >The average PC has many tasks running and even then unless the CPU is a >> > > >pig and the graphics unassisted doing a web browse is usually limited to >> > > >only how fast all the data gets there. >> > > > >> > > >However for 80x24 text terminal the cpu overhead is very low and the >> > > >graphics load (screen) lower, linux give you that if you don't run the GUI >> > > >and its very fast.? I know this from running and ARM7 based system at >> > > >300mhz and for text and compiling code for itself the limiting factor is >> > > >actually the disk subystem (a micro SD chip). >> > > > >> > > >To e the raspberry-pi is a great computing resource for embedded tasks. >> > > > >> > > >Allison >> > > >> > >? What about security? Does Rpi employ a firewall and virus scanning? And >> > >> > What on earth for? It is not running Windows, it runs Raspbian (a modified >> > Debian Wheezy) by default. Aside from the fact that virus scanners are >> > useless in general. >> > >> > C: You entirely missed the point apparently. It was being compared to a >> > Windows box in terms of performance. >> >> That isn't really a valid comparison as your typical Windows box (assuming >> it is less than 4 years old) has a _lot_ more memory, storage and much more >> CPU and GPU than a Raspberry. >> >> > Most Windows boxes employ a firewall and >> > virus scanner (and spam killer, cookie cutter, etc. oi). You haven't noticed >> > Norton or Kaspersky slowing down your system? > >Not at all, they have absolutely no impact on any of my systems. Which would >be because all my systems run Unix of some sort (mostly Linux, but also >NetBSD and FreeBSD). Ok so therefore not in a position to discuss whether or not the pi should be compared to a windows box to begin with. People love to pick fights on topics, all the while loudly proclaiming they lack all the facts. >> > >? since the pi uses sd storage, it might make more sense to compare it's ? >> > >internet capabilities with a tablet or smart phone. >> > >> > What "internet capabilities"? It is a Linux box. Which mean you can do pretty >> > much anything (within the computational & I/O limits of the box - it won't >> > work as an IMAP-Server for 100000 users for example). >> > >> > C: You're batting a thousand (which seems to be a trend in this discussion). >> > Windows boxes (and Linux boxes for that matter) use hard drives. The pi uses >> > sd storage. As do smart phones, tablets. > >And what exactly does the storage medium have to do with what the system >can do network-wise? For that matter, the Raspberry Pi can use harddrives >just fine: simply attach (via powered hub) a USB disk ... The issue isn't solely about network specifics. Your ability to load/offload data has something to do with the overall net experience, I'm sure. >Kind regards, > Alex. >-- >"Opportunity is missed by most people because it is dressed in overalls and > looks like work." -- Thomas A. Edison

13 years, 5 months

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Calculators [was: Re: Raspberry Pi]

by rampaginggreenhulk＠yahoo.com

------------------------------ On Sat, Mar 2, 2013 5:21 AM PST Jason McBrien wrote: >> >> From: Seth Morabito <lists at loomcom.com> >> C: And you actually don't believe there's any merit in strengthening your >> problem solving ability by doing a certain number of rote calculating, >> particularly in the young mind? >> > >Rote calculating only marginally improves problem solving abilities. Mainly >it drills into your head the basic mechanics of calculation. I have no >problem with this in early elementary, however, once algebra is introduced >symbolic computation should be priority. I was still doing long division in >high school - what was the point of that? After 10 years I had it pretty >well down (heck I had it down after 5 years) After basic calculation and >algebra are mastered, I don't see *any* reason to compute any A/D/M/S >operation. > >As an aside: here's an incredible game that teaches 8-year-olds algebra: >http://dragonboxapp.com/ well at least to me it's funny that you bring up long division. I was very good at math through bout my schooling taught myself how to multiply before it was introduced. But long division was always weird to me and still is. in recent history I think I forgot how to do it once or twice. which might sound silly but it's simply reinforces the fact that you need to reinforce the facts.

13 years, 5 months

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Any idea who built this 1972 Intel 8008 Micro?

by elson＠pico-systems.com

Subject: Any idea who built this 1972 Intel 8008 Micro? Message-ID: <757329711804df14f8af9915bc2cc5e1.squirrel at www.solomonson.net> Content-Type: text/plain;charset=iso-8859-1 In the early 1980's I picked up a micro built around an Intel SIM8-01 development system at an electronics swap meet in Minneapolis. The enclosure is professionally fabricated in a deep red translucent plastic case and uses what appears to be one of the earliest SIM boards issued by Intel. All indications is that it was built in the summer or early fall of 1972. I used some smaller Intel 8008 boards in 1976 for a project, but they generally looked a good deal like the ones in the video, just a bit smaller. My guess is that is a one-of-a-kind unit. Jon

13 years, 5 months

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Any idea who built this 1972 Intel 8008 Micro?

by craig＠solomonson.net

In the early 1980's I picked up a micro built around an Intel SIM8-01 development system at an electronics swap meet in Minneapolis. The enclosure is professionally fabricated in a deep red translucent plastic case and uses what appears to be one of the earliest SIM boards issued by Intel. All indications is that it was built in the summer or early fall of 1972. I would like to find out who or what company might have built this system and for what reason. I have posted a YouTube video showing some of the features of this computer and a bit of history about it. You can view the video at: https://www.youtube.com/watch?v=GG6goCIWCYY What is also interesting is that the guy that sold me this computer had 3 micros on his table and all were like new and in working condition. They included this Intel system, an Altair 8800 (factory assembled with serial #5!), and a beautiful SOL-20. That was a nice little collection for one individual to have at that time--seems like he was either well connected in the industry at that time or might have been part of some local R&D department (CDC, Univac, or Honeywell?) and was helping them clean house! Let me know if you have ideas or have seen this system before. Thanks!

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:04 AM PST Allison wrote: >On 02/28/2013 11:45 AM, ben wrote: >> >> That "low price is best trend" I would change. For me a modern programing tool is "text editor" and 80x24 text screen on 15" display. >> Explain to me why a cheap PC in my home can't keep up to the net (windows 7) and a credit card computer can do better for surfing. >> Ben. >> > >Simple task specialization, and task overhead limiting. That and in7 is just a bigger pig. > >The average PC has many tasks running and even then unless the CPU is a pig and the graphics >unassisted doing a web browse is usually limited to only how fast all the data gets there. > >However for 80x24 text terminal the cpu overhead is very low and the graphics load (screen) >lower, linux give you that if you don't run the GUI and its very fast. I know this from running >and ARM7 based system at 300mhz and for text and compiling code for itself the limiting factor >is actually the disk subystem (a micro SD chip). > >To e the raspberry-pi is a great computing resource for embedded tasks. > >Allison What about security? Does Rpi employ a firewall and virus scanning? And since the pi uses sd storage, it might make more sense to compare it's internet capabilities with a tablet or smart phone.

13 years, 5 months

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Calculator Use (was: Re: Raspberry Pi)

by bobvines00＠gmail.com

[snip] > Message: 18 > Date: Thu, 28 Feb 2013 14:05:30 -0800 (PST) > From: Chris Tofu <rampaginggreenhulk at yahoo.com> > To: cctalk at classiccmp.org > Subject: Re: Raspberry Pi > Message-ID: > <1362089130.27488.BPMail_high_carrier at web141105.mail.bf1.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > > > ------------------------------ > On Thu, Feb 28, 2013 11:38 AM PST Tony Duell wrote: > >>It has been said that now that calcualtors are everywhere, kids do not >>need to leanr how to do long multiplication and division. I am nto sure I >>accept that (given that long multiplciaton and division have applciations >>in manipulating agebraic expresions too). But I am convinced that if you >>are goign to assume that clacualtors are everywhere you should teach kids >>why said calculators do not always give the right answers and how to >>avoid such problems. >> >>-tony > > When I was in hs, calculators weren't seen until or 12th grade. When it was > impractical and too time consuming to work out every log, trig function, or > laborious arithmetic operation. Kids have been bringing calculators to > school for 2 decades probably, and I for one see that as a travesty. > Just last year, I had to show a young Engineer in my office how to use my 1983-vintage Radio Shack scientific calculator! :P He's young enough to either have mostly used smart phone apps for such things rather than *real* calculators, or he'd forgotten how to use a scientific calculator because of his app use/dependence. Of course, another Engineer in my office discovered the hard way that his calculator app was faulty when calculating a trig function (Sine, I think) for a problem. Fortunately, a real calculator convinced him that his app had a bug (a RAD to DEG conversion programming error) -- he immediately found a better calculator app. Bob

13 years, 5 months

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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:59 AM PST Tony Duell wrote: >BUT this will not coverrt scan rates. You end up with a composite signal >with an 18kHz horizotnal scan frequency if you start with an MDA singal. >Some monuitors can be tweked ot handle that, many cannot. Of those that >can, they might not like it too much,m you are stressing the horizotnal >ouptu transisotr and flyback transoformer a bit. Are said xsistors readily replaceable with one that can handle a wider range? What ultimately happens if you push a flyback too far? Burnt winding? >> Have you tried beeping? I think rom BASIC supports beeping or some > >The cassette mtoor control commands (is that MOTOR ON and MOTOR OFF?) are >suitable too. Bulb/s? >When I had a floppy disk controller problem on mt PC/XT, I put the board >on an extender, booted to ROM BASIC and used port acccess commanedst to >fiddle eith the control registers on the FDC board. A bit of work with a >logic probe and I found the faulty IC. The only logic probe I ever owned, still own I think, was only good to 1mhz I think. Probably suitable for what you mentioned, but not everything on a pc obviously. Address and data is pulsed at what frequency?

13 years, 5 months

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Learning (was: Re: IBM 5150 ROMs)

by mtapley＠swri.edu

At 12:00 -0600 3/1/13, Ben wrote: >I'd use a COCO II computer. You don't need to run the software. :) >Ben. Maybe not for recording Win7, but for learning BASIC, this turns out to be good advice. One from Cindy's warehouse (after taking off the dusty top case and washing it and the keys, and buying an RCA-to-"F"-connector adaptor for the video) has spent part of last night and *all* of this morning (since before I got up until after noon) teaching Extended Color Basic to my 12-year-old son. WOOT. Maybe I'm dreaming, but I may finally have found at least a partial antidote to "MineCraft". Fortunately, I already own a cassette recorder and cable and the EDTASM cartridge, and Drivewire 3 with OS-9 images runs on our G3 iMac, so assuming that talks to the CoCo, he's got room to grow for a while. I suppose I should try to get Drivewire 4 running on the iMac ... For reference: http://www.cloud9tech.com/ Cassette recorder/cable (and many other goodies) http://www.frontiernet.net/~mmarlette/Cloud-9/Software/DriveWire3.html DriveWire 3, runs on the iMac but haven't tested communications yet https://sites.google.com/site/drivewire4/ DriveWire 4, not running for me on Mac OS X.4 http://www.altex.com/F-Female-to-RCA-Male-Adapter-7530-P140726.aspx Adapts channel 3 RF-encoded video from CoCo 2 RCA jack to "F" connector -- - 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, 5 months

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Raspberry Pi

by healyzh＠aracnet.com

The talk about the Acorn and RISC OS reminds me that I've been interested in one of these, primarily to run RISC OS. What is the recommended version, price, and place to get a Raspberry Pi from? I assume I want a "2.0 Model B 512Mb"? I've found a seller on eBay with this and they include a case for $57. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com | OpenVMS Enthusiast | | | Photographer | +----------------------------------+----------------------------+ | My flickr Photostream | | http://www.flickr.com/photos/33848088 at N03/ | | My Photography Website | | http://www.zanesphotography.com |

13 years, 5 months

21
57
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IBM 5150

by feldman.r＠comcast.net

>Message: 11 >Date: Thu, 28 Feb 2013 16:24:14 -0500 >From: Ethan Dicks < ethan.dicks at gmail.com > > >On Thu, Feb 28, 2013 at 3:11 PM, Fred Cisin <cisin at xenosoft.com> wrote: >> On Thu, 28 Feb 2013, Cindy Croxton Electronics Plus wrote: >>> I have never seen Autocad for a 5150, but there are color games for the >>> 5150, and if you have a color monitor, the games have code in them to set >>> the colors and resolution... >> >> For some reason, CGA AutoCad never really caught on. > >I'm sure there's very little if any CAD for CGA. The oldest program I >personally used was OrCAD, and that was in the 5170 PC-AT days, and >that was, IIRC, EGA, or at least that's what was on the machine I was >using it on. > >-ethan The first half dozen or so versions of AutoCAD could run at CGA resolution. I ran my first version of AutoCAD (2.08, Release 5) on an XT clone with a CGA card. Later, I was able to afford a Techmar Graphics Master. I could run that at 708 by 708 monochrome on the same XT clone. I still have the software, but unfortunately no longer have the Techmar card. I have also run AutoCAD 2.14 (Release 6) on an HP 200LX palmtop, which is basically CGA. It can be done, but the limited resolution does hamper what you can do. I also have a copy of AutoCAD 1.4 (Release 4, 1983) that was customized by John Walker to run on an Otrona Attache 8:16 for an archaeologist colleague at the University of Chicago. The Otrona has a strange software emulation of CGA! Bob

13 years, 5 months

1
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DIBOL-11 manual?

by earl＠retrobits.com

Anybody know where there might be a DIBOL-11 language reference manual? Have checked the usual haunts, no joy. Thanks, - Earl

13 years, 5 months

1
0
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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

>> How would such late versions of Windoze wind up on the other 5150? >> Wonders never cease. > >The other 5150 could run a CD-ROM drive. There are a few complications to >doing so, such as needing DOS 3.10 or above if you don't want to write >your own CD-ROM drivers, etc. I've never put a DVD drive on a 5150, but >I don't think that the differences would matter much. Better yet, let's test the premise in a non anachronistic real world way by transferring Winders 7 to o roughly 126,000 cassette tapes. You can start w/o me. I'll join in in about 6 months. My advice is to get the fastest 8088 you can find.

13 years, 5 months

3
4
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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 12:46 PM PST Cindy Croxton Electronics Plus wrote: >We have the video cards, too. List please :)

13 years, 5 months

2
1
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Which PDP-8, PDP-11, Etc., Components Require Protection from High Humidity?

by bobvines00＠gmail.com

I've been storing my PDP-8s, PDP-11s, disk drive units, floppies, etc., in my garage at about 45% relative humidity in an attempt to prevent corrosion/deterioration. Finances are about to force me to turn off my dehumidifier out there and I can't bring the *complete* machines into the house. Which components, modules, or other related items should I be most concerned about protecting from high humidity? Which should I move into my house? Magnetic core modules? Disk packs? Floppies? Etc.? Any recommendations? Thanks, Bob

13 years, 5 months

2
1
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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 6:56 PM PST Chuck Guzis wrote: >A friend and I marketed a replacement for the MDA card on a 5150/5160 that used a Z80 and a bunch of parts to allow the PC user to replace their display card and hook up a VT-100/220 style terminal--and switch or split-screen the PC data with other serial data (say, from a minicomputer) on the terminal. It also took the terminal keyboard codes and translated them to 5150 scan codes. It had a certain appeal, but wasn't fast enough to work effectively with a 5170 and would not do graphics. > >I still have the board (and a few abandoned prototypes). I want them. All of them.

13 years, 5 months

2
1
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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

>> Better yet, let's test the premise in a non anachronistic real world way by transferring Winders 7 to o roughly 126,000 cassette tapes. You can start w/o me. I'll join in in about 6 months. >> >> My advice is to get the fastest 8088 you can find. >> >> > >I'd use a COCO II computer. You don't need to run the software. :) >Ben. Who said anything about running it! >

13 years, 5 months

1
0
0 0

IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 10:18 AM PST Cindy Croxton Electronics Plus wrote: >Why can't you just write a small batch program that references the driver >and the necessary commands, and put it on the startup disk? If not enough >room on a 360K, then you can use a second floppy. We used to do this for >customers all the time, 15 years ago. Also included small start up menus, >etc. Drivers = extension rom code? Interesting proposition. I'll wager it's not very straitforward. Numerous graphics cards had drivers for say Autocad and whatnot. But that's entirely different from the startup code needed to set up initial register values and whatever on the cards chips. It seems what you're saying is the pc will startup w/o video (usually returns an error, but you can use a pc w/a terminal off the rs232 port, just don't ask me the particulars). Then initialize the video card as dos is starting. Seems possible, would be interesting to see someone do it. >-----Original Message----- >From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] >On Behalf Of madodel >Sent: Thursday, February 28, 2013 11:48 AM >To: General at proxyz14.mailnet.ptd.net; Discussion at proxyz14.mailnet.ptd.net >:On-Topic and Off-Topic Posts >Subject: Re: IBM 5150 > >On 2/28/13 9:43 AM, TeoZ wrote: >> The ROM say IBM 1981, this unit must be early, Serial # 0155185 (did >> they start from #1?). > >I was told by David Both that he used the very first PC off the assembly >line to write the PC Documentation. When I asked what happened to PC #1 >after he was done with it he said as far as he knew the same thing they did >to all their internal use machines at the time. Stripped it for parts for >warranty repairs. > >Mark > > >> So I guess I have to find an original IBM CGA card then and all is well? >> >> ----- Original Message ----- From: "Christopher Satterfield" >> <christopher1400 at gmail.com> >> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> >> Sent: Thursday, February 28, 2013 3:53 AM >> Subject: Re: IBM 5150 >> >> >> I believe your VGA problem has to do with the older IBM ROMs, I >> believe you need the '82 BIOS to use a VGA card or any card with it's >> own BIOS, and being as I have a 16-64 KB 5150 with the newer BIOS I >> assume yours will work also, saying you have an EPROM programmer. >> >> -- >> C:\win >> Bad Command Or File Name >> C:\ >> >> > > >-- > > From the eComStation Desktop of: Mark Dodel > > Warpstock 2013 - http://www.warpstock.org > Warpstock Europe 2013 -http://www.warpstock.eu > > >For a choice in the future of personal computing, Join VOICE - >http://www.os2voice.org > > "The liberty of a democracy is not safe if the people tolerate the growth >of private power to a point where it becomes stronger than their >democratic State itself. That in it's essence, is Fascism - ownership >of government by an individual, by a group or by any controlling private >power." Franklin Delano Roosevelt, Message proposing the Monopoly >Investigation, 1938 > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 >

13 years, 5 months

7
11
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Looking for old HP PA7100LC and MOTO 88110

by michael＠almegacy.com

Dear cctalk: Please add the following post to your daily digest. Please let me know if you have any questions or if there are any issues. Very best regards, Mike *Wanted to purchase: Systems containing Motorola 88110 Processor or HP PA7100LC Processor: * ? Motorola MVME197DP or MVME197SP single board computers utilizing the original 88110 processor, or any system that utilized the Motorola 88110 processor (such as the MOTOROLA 900, 900R workstations or other company?s workstations (e.g., Data General AViiON, Harris Real Time Unix Servers)), originally sold in the United States on or before August 16, 1994. Proof of sale (receipt or the like) is highly preferred. Also interested in technical documentation on any of the above that shows a breakout of the serial number on the MVME197 (SP or DP) or on the 900 or 900R or on other systems that used the Motorola 88110 processor in order to decipher date of manufacture, country of manufacture, etc. ? HP Systems containing the PA7100LC processor, such as the 9000 E-class business servers (Models E25, E35, E45, E55), or the HP 9000 Series 700 Models 712/60 and 712/80i, or HP 9000 Models 715/64, 715/100, 725/100 or HP 9000 Model 743 or HP 9000 model 748i, or HP 3000 Series 9X8 servers such as HP 3000 Series 918 LX, HP 3000 Series 918 RX, HP 3000 Series 928 LX, HP 3000 Series 928 RX, HP 3000 Series 968 LX, HP 3000 Series 968 RX, HP 3000 Series 978 LX, HP 3000 Series 978 RX, originally sold in the United States on or before August 16, 1994. Proof of sale (receipt or the like) is highly preferred. Also interested in technical documentation on any of the above that shows a breakout of the serial number in order to decipher date of manufacture, country of manufacture, etc.

13 years, 5 months

2
2
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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 4:21 PM PST David Riley wrote: >On Feb 28, 2013, at 3:45 PM, Chris Tofu wrote: > >> >> >> But the burning question is could you fiddle with the extension rom code and use it as a loadable device driver? After all you could transfer rom BASIC to a disk file and run it that way. > >Probably not; extension ROMs usually provide services to the BIOS (or >hook interrupts used by the BIOS and run in place of the BIOS >routines) while DOS drivers tend to provide services directly to DOS. >It's akin to the difference between a driver and an application (but >obviously not exactly the same). I would have guessed extension roms contain raw independent code. Largely just writing values to port addtesses >Whether you could run a script from autoexec.bat or config.sys to >execute expansion ROM code after DOS boot is another question, but >I have no idea how well that would work after the BIOS has already >handed over control to the OS (I suspect not so well, but I don't >know for sure). You can certainly try jumping to the code location >in DEBUG or the like. Which lead me to ask what a video device driver is/does. Presumably when you type Mode co,80 iirc, or screen 1 in basic, you're assigning different values to ports ie fiddling with say the 6845's registers, thereby creating another screen on the fly. Unless I'm wrong. But if not, isn't that kind of what a dd does? There's bound to be more then that going on. But code is code, regardless of what stage of the game you're in, start up, boot up, os fully installed. The os only has as much control as you allow it. You communicate with dos, but s/w at least can manipulate the h/w. Which is why s/w has too much power under dos. When dos transfers control to a bunch of code, it's boss. > >- Dave > >

13 years, 5 months

3
2
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Next warehouse day March 2

by sales＠elecplus.com

The next Kerrville warehouse day is March 2, starting 9AM. Those who have come have gleaned many treasures J Please let me know if you plan to come, and what areas you are interested in, so I can start digging things out for you. Bring a truck, bring a U-Haul, I need to clear some things out! Old Sperry server, RA82 hard drive, lots of terminals and keyboards, old memory, what are people looking for? Old mono and color 9-pin monitors, early 15-pin monitors, daisy wheel and dot matrix printers, etc. Most of this old equipment does not take to UPS shipping very well. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 (830)792-3400 phone (830)792-3404 fax AOL IM elcpls _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2899 / Virus Database: 2639/6114 - Release Date: 02/18/13

13 years, 5 months

2
2
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IBM 5150

by rampaginggreenhulk＠yahoo.com

But the burning question is could you fiddle with the extension rom code and use it as a loadable device driver? After all you could transfer rom BASIC to a disk file and run it that way. ------------------------------ On Thu, Feb 28, 2013 12:06 PM PST Fred Cisin wrote: >On Thu, 28 Feb 2013, Cindy Croxton Electronics Plus wrote: >> Why can't you just write a small batch program that references the driver >> and the necessary commands, and put it on the startup disk? If not enough >> room on a 360K, then you can use a second floppy. We used to do this for >> customers all the time, 15 years ago. Also included small start up menus, >> etc. > >The "driver" is a ROM. You'd have to start by writing a LOADABLE driver. >It would be convenient to have another machine on hand while writing it, >since the "driver" is to get the video to work. > >It would be MUCH MUCH easier to install a CGA or MDA card, and contact >Cindy Croxton in Texas and buy one of her "9-pin monitors". > >

13 years, 5 months

3
4
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 6:18 PM PST Richard wrote: > >In article <512FE45E.5000602 at jwsss.com>, > Jim Stephens <jws at jwsss.com> writes: > >> The lack of exploits does not mean there will be none. There are still >> vulnerabilities which could work on a linux machine as well as any of >> the PC or Macos ones as well as any. > >How quickly people forget that the first major internet >(unintentional) DDOS attack was all against unix machines. W/o looking at your citation, I'll guess it was at a time when there was little else on the internet (arpanet?). ><http://en.wikipedia.org/wiki/Morris_worm> >-- >"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> > The Computer Graphics Museum <http://computergraphicsmuseum.org> > The Terminals Wiki <http://terminals.classiccmp.org> > Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

13 years, 5 months

1
0
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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 4:33 PM PST David Riley wrote: >On Feb 28, 2013, at 4:24 PM, Ethan Dicks wrote: > >> On Thu, Feb 28, 2013 at 3:11 PM, Fred Cisin <cisin at xenosoft.com> wrote: >> On Thu, 28 Feb 2013, Cindy Croxton Electronics Plus wrote: >>> I have never seen Autocad for a 5150, but there are color games for the >>> 5150, and if you have a color monitor, the games have code in them to set >>> the colors and resolution... >> >> For some reason, CGA AutoCad never really caught on. >> >> I'm sure there's very little if any CAD for CGA. The oldest program I >> personally used was OrCAD, and that was in the 5170 PC-AT days, and >> that was, IIRC, EGA, or at least that's what was on the machine I was >> using it on. > >The original AutoCAD (for some degree of the term "original") was >developed for DOS on 8086 and CP/M-80 (plus early development for >the TI 9900). John Walker has a document-based history of >AutoCAD development here: > >http://www.fourmilab.ch/autofile/ > >I think my favorite document is this one: > >http://www.fourmilab.ch/autofile/www/section2_10_8.html > >I'm still a little upset that we've ended up (OK, not ALL of us) >with the 8086 as the dominant processor of the computing world. > >In any case, I would imagine that the DOS version of AutoCAD in >1982 wasn't using anything better than CGA. Some of the dev >notes for AutoCAD-80 note that work got done faster because the >CP/M port relied on more intelligent output devices that needed >less low-level control than the IBM and Victor 9000 ports. > > >- Dave And unless I'm mistaken, Autocad ran on a cga equipped 5150 through version 7 or 9. I think it was 9 I got from the job. And all they had in my dept was the early 5150. Later upgraded it to a hybrid 286.

13 years, 5 months

1
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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 12:13 PM PST Fred Cisin wrote: >On Thu, 28 Feb 2013, Chris Tofu wrote: >> It seems what you're saying is the pc will startup w/o video (usually >> returns an error, but you can use a pc w/a terminal off the rs232 port, >> just don't ask me the particulars). Then initialize the video card as >> dos is starting. Seems possible, would be interesting to see someone do >> it. > >Yeah, we used to. > >It is nice, however, to have boot video! So why didn't you use a terminal? You can run a video card and a terminal simultaneously, no?

13 years, 5 months

3
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DOS video device drivers

by rampaginggreenhulk＠yahoo.com

That...might be a good place to look! I may already have every IBeeMer refernce manual known to man (or wimminz). Also got another journal thing on the subject. Where is that thing... But what I was looking foris more or less a skeleton flowchart description. Maybe if I hum and contemplate Josh's goofy answer, I'll come to the discovery that it's sufficient. NOT. ------------------------------ On Thu, Feb 28, 2013 2:48 PM PST Cindy Croxton Electronics Plus wrote: >I will drag out my old 8088 IBM ref book and get back to you on that. > > >-----Original Message----- >From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] >On Behalf Of Chris Tofu >Sent: Thursday, February 28, 2013 3:07 PM >To: cctalk at classiccmp.org >Subject: DOS video device drivers > > >What do they consist of? Is a brief description possible. Please. > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 >

13 years, 5 months

1
0
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Qudos MINICHIP / Quickchip ECAD and Ferranti ULA docs

by classiccmp＠philpem.me.uk

In my long-running tradition of obscure requests... Does anyone know if a copy of the Qudos Ltd "MINICHIP" gate array design tool still exists anywhere? This was a CAD tool designed for the BBC Micro (with 6502 Second Processor) which allowed the machine to be used for the design of Ferranti ULA gate arrays. There was also a similar tool called "Quickchip" for the Acorn Archimedes ("A440 only" according to page 22 of this: http://acorn.chriswhy.co.uk/docs/Acorn/Brochures/Acorn_APP155_HardwareExpan… ) There's some mention of MINICHIP here: http://www.chilton-computing.org.uk/inf/literature/newsletters//ecn01-20/p0… http://books.google.co.uk/books?id=GzPpAAAAIAAJ&lpg=PA85&ots=sR_gUYkMii&dq=… I'm also interested in a copy of any documentation on Ferranti ULAs - databooks, details on the logic cells (specifically the ULA9C series but ULA5C may also be useful), design software (or documentation thereof) and so on. Examples: Qudos Ltd. - Qudos Logic Array Design Software Manual QED2 (pub. 1986) Ferranti - Ferranti ULA Design Manual A/F002 (pub. 1981) Guessing what I'm trying to do is left as an exercise to the reader... but it involves photos of the Tube ULA layer masks and a copy of Degate... :P Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

13 years, 5 months

2
2
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Xerox 16/8 was Re: HPUX Enterprise Operating Environment

by rampaginggreenhulk＠yahoo.com

Got one too :) But the "box" doesn't work, too well anyway. I just figured I could hit ya up for a rom image if necessary. ------------------------------ On Thu, Feb 28, 2013 2:04 PM PST Dave Land wrote: >On 2/28/13 12:43 PM, Chris Tofu wrote: >> >> Hey Dave, is your Xerox fully functional? >> >> >Chris, > >Yes, it works very well as a matter of fact. :) ..and before you ask, >that's the one I'll probably hang onto for a while, heh heh! > >D- > >-- >Dave Land >Land Computer Service > >Check out my site at http://www.landcomp.net

13 years, 5 months

1
0
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Raspberry Pi

by barythrin＠gmail.com

Its not going to be rpi specific but it will be at risk for any standard exploit for services it hosts. You could pwn it via apache, dns, mail server, etc but again its mostly app vulnerabilities and no real blame to the product itself. For protection it shouldn't have any problem running simple iptables (firewall rules), clamav (on demand virus scanner) if desired or I suppose even snort or other ids/ips although thatd certainly take away from the limited resources. Either way it should have all the charm of the ported OS.

13 years, 5 months

1
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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 12:02 PM PST Fred Cisin wrote: >> >Anybody remember USES of the SIXTH ROM socket? >On Thu, 28 Feb 2013, Chris Tofu wrote: >> Sorry no >> >"MBI" (probably a different MBI) made a supplement ROM that added >> >some printer configuration features, etc. >> >I think that there still is one in my 16K 5150 > >> Such a big market for them old printers these days > >and THAT was the IBM version of the Epson MX80! > >> (ok a plotter is a sort of printer and the only way anyone's getting >> mine is wrenching it from my cold rigor mortised embrace. > >Proposed transfer terms? Acceptable. But the initial assailant/s might wind up as dead as me. Someone else might get it. But not them. >> >Other "non-standard" ROMs: >> >Todd Fischer? made a diagnostics ROM, to temporarily replace the BIOS ROM, >> >and communicate through the serial port! >> Ooh gimme dat! I want one seriously. What's his phone number? > >doubtful that it is still the same AREA CODE The send out an APB. >> You can pop the hood and put in a new chip. But what about an extension >> via the all too popular casette port? > >Once you boot up, and go into cassette BASIC, then you can load almost any >age-appropriate software through the cassette port. You could even >connect two 5150s through the cassette port and transfer files. Any idea >how long it would take to transfer Windoze7? (Windoze 3.10 or above will >not run on a 5150.) How would such late versions of Windoze wind up on the other 5150? Wonders never cease. > >-- >Grumpy Ol' Fred cisin at xenosoft.com

13 years, 5 months

2
1
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DOS video device drivers

by rampaginggreenhulk＠yahoo.com

What do they consist of? Is a brief description possible. Please.

13 years, 5 months

3
2
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 12:22 PM PST Tony Duell wrote: >I do wonder, though, why you think the HP67 (1975-ish) was the last >useable HP calcualtor. I feel the HP41 and HP71 families are also >well-desngied. Current HP models, fo coruse, are not. > >-tony In a mad fit I sold my 50g. I could see myself buying another one. The 75mhz Arm made the clearing of the stack tolerable (less then a second, 3-4 on the 49g. Zounds). You got to love something. You can't fix everything in this day and age. I'm told the TI-nspire CX CAS is more toy then anything. You gotta love something though. My 49g's have fallen on hard times. Can't figure out why my old TI86 doesn't work, I used it 3 times. Need a replacement. Need one bad...

13 years, 5 months

1
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cctech Digest, Vol 114, Issue 42

by tmfdmike＠gmail.com

Bit late, but I'm totally up for... let's say three... Omnibus-USB interfaces. Let me know details when they're fixed - price, ordering etc. Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'

13 years, 5 months

2
1
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Xerox 16/8 was Re: HPUX Enterprise Operating Environment

by rampaginggreenhulk＠yahoo.com

Hey Dave, is your Xerox fully functional?

13 years, 5 months

2
1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:55 AM PST Jim Stephens wrote: > >On 2/28/2013 11:40 AM, Chris Tofu wrote: >> What about security? Does Rpi employ a firewall and virus scanning? And since the pi uses sd storage, it might make more sense to compare it's internet capabilities with a tablet or smart phone. >Raspian, the debian equivalent that runs on the Pi is just one of many OS's that run on that target. > >You have confused the target (arm 7) and platform (Raspberry Pi) with the OS. The things you speak of above have entirely to do with the OS and nothing to do with the platform or target, other than performance. > >The Rpi has nothing to do with firewall, virus scanning, or security in this context. It is true that many target processors have enhanced security and media extensions, but I do not think the Pi has such. > >And unless you go out of your way to run windows or macos emulations on the rpi, the virus is pretty much astronomically useless to discuss. The chances of any targeted virus to an arm at this point is pretty remote, though I'm sure there are linux exploits that may be applies. C: we were specifically discussing performance. People seem to have an inordinate attachment to this thing. And do I have to say again I'm not altogether panning it. But to state there's no concerns about virus' on a unit that's being touted as general purpose computer is insane. The performance benefits obviously have everything to do with what it's running (commonly running?). You could install an inefficient pig on rpi just like anything else. I'm not confusing anything. There's many reasons why things go slow and things go fast.

13 years, 5 months

2
1
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HPUX Enterprise Operating Environment

by xmechanic＠landcomp.net

Don't know if anyone is interested, but I have a complete boxed set of HPUX 11i Ver. 1 Enterprise Operating Environment complete with Gold Pack updates, and Bonus Pack Software. Covers most all of the PA-RISC machines capable of supporting HPUX 11i (9000 series servers, workstations, etc.) I had bought it several years ago for a J6750 workstation that I eventually changed over to Linux. You can see the details here... http://www.landcomp.net/index.php/2012-11-28-23-34-35/15-computer-related/7… -- Dave Land Land Computer Service Check out my site at http://www.landcomp.net

13 years, 5 months

2
3
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For Sale - Kaypro II

by xmechanic＠landcomp.net

Non-Linear Systems Kaypro II - 1983? model Serial No. 27171 Machine is complete with 2 - 5.25" floppy drives and powers up, but I have no software to test it fully. Has new keyboard cable and comes with power cord. Need to unload some stuff to make room for some new office furniture that I just acquired. $125.00 USD + shipping Shipping weight with packing would be around 30 - 33 lbs. http://www.landcomp.net/index.php/2012-11-28-23-34-35/18-vintage-computer-s… -- Dave Land Land Computer Service Check out my site at http://www.landcomp.net

13 years, 5 months

3
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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

On Thu, Feb 28, 2013 12:25 PM PST Tom Cruise wanna be wrote: >Easy enough to do, just stop watering him. My roots go deep enough and are strong enough to snap an F15 hull like an eggshell. >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, 5 months

1
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IBM 5150

by rampaginggreenhulk＠yahoo.com

This will be little help, and I can't recall the exact details, but a magazine I used to have described a circuit that IIRC put MDA on a composite monitor. It was Micro something, and common enough but just wasn't BYTE or PC Mag. And you built the thing by wire wrapping w/machine pin sockets and pins that at the time IIRC you could only get from Mouser. They were named as the source anyway. Have you tried beeping? I think rom BASIC supports beeping or some kind of rudimentary sound generation. With no floppy disk or h/d it automatically loads BASIC. Hallelujah. It can be a useful diagnostic tool.in some instances.

13 years, 5 months

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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

>Anybody remember USES of the SIXTH ROM socket? Sorry no >"MBI" (probably a different MBI) made a supplement ROM that added >some printer configuration features, etc. >I think that there still is one in my 16K 5150 Such a big market for them old printers these days (ok a plotter is a sort of printer and the only way anyone's getting mine is wrenching it from my cold rigor mortised embrace. And would you believe I only payed 5 clams. How much joy can you get for 5$ these days???) >Other "non-standard" ROMs: >Todd Fischer? made a diagnostics ROM, to temporarily replace the BIOS ROM, >and communicate through the serial port! Ooh gimme dat! I want one seriously. What's his phone number? ROM monitors are standard on many Japanese puters, Canon, NEC. Just can't find any docs :( You can pop the hood and put in a new chip. But what about an extension via the all too popular casette port? > >-- >Grumpy Ol' Fred cisin at xenosoft.com

13 years, 5 months

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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:53 AM PST Cindy Croxton Electronics Plus wrote: >We have IBM 5150s here. I can put almost any 8-bit ISA video card in it, >and get the boot sequences on the screen. If it is supposed to be color, >but comes up b/w, then I make a batch program called color.bat or whatever >and reference the driver for the card, and presto, I have color. Some of >these old cards came with drivers, and I have a very large collection of >these very old drivers. But again a driver is different from the post code contained in the extension rom. You can also change the screen from a black and white screen (not the same as an MDA screen) with a mode command in dos or screen in BASIC. >Some of the old cards have switches or some other means to set the graphics >mode and resolution, but others do not. There are very few old 8-bit cards >that will not work on the 5150. True. But there are a lot of cards out there that aren't CGA, MDA, EGA, PGC, VGA and they're seldom seen. >I have never seen Autocad for a 5150, but there are color games for the >5150, and if you have a color monitor, the games have code in them to set >the colors and resolution. Since there were a number of cards, and thus a >wide variety of options for the game programmers, they usually chose 8 or 16 >colors, and told the user to choose 40 or 80 columns, and then you had a >color game. Granted, circles and ovals looked like a bunch of tiny squares >lined up to make a circle or oval, but they ran pretty well. Autocad didn't need drivers for CGA, but did to run advanced modes of some cards even if they did emulate or were really CGA but on steroids. You needed drivers to run A* in high res modes on the IBM Professional Graphics Controller, which starts right up as double scanned CGA (on a 5175 or multisync). Autocad had to provide drivers for bloody loads of cards if they wanted their s/w to work. Whether the high res modes were initialized by the driver or at startup along with the CGA's 6845 registers I couldn't tell you. But probably at POST. I did have a problem with the PGC card on one AT, but didn't investigate and the problem may have been that it was setup for MDA (do you set dip switches in an AT like a PC or PC/XT?). But I seem to recall putting in a VGA card subsequently. Does the VGA also look like an MDA to an early PC/XTG/AT? >-----Original Message----- >From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] >On Behalf Of Chris Tofu >Sent: Thursday, February 28, 2013 12:51 PM >To: cctalk at classiccmp.org >Subject: RE: IBM 5150 > > > >------------------------------ >On Thu, Feb 28, 2013 10:18 AM PST Cindy Croxton Electronics Plus wrote: > >>Why can't you just write a small batch program that references the >>driver and the necessary commands, and put it on the startup disk? If >>not enough room on a 360K, then you can use a second floppy. We used >>to do this for customers all the time, 15 years ago. Also included >>small start up menus, etc. > > Drivers = extension rom code? Interesting proposition. I'll wager it's not >very straitforward. Numerous graphics cards had drivers for say Autocad and >whatnot. But that's entirely different from the startup code needed to set >up initial register values and whatever on the cards chips. > It seems what you're saying is the pc will startup w/o video (usually >returns an error, but you can use a pc w/a terminal off the rs232 port, just >don't ask me the particulars). Then initialize the video card as dos is >starting. Seems possible, would be interesting to see someone do it. > >>-----Original Message----- >>From: cctalk-bounces at classiccmp.org >>[mailto:cctalk-bounces at classiccmp.org] >>On Behalf Of madodel >>Sent: Thursday, February 28, 2013 11:48 AM >>To: General at proxyz14.mailnet.ptd.net; >>Discussion at proxyz14.mailnet.ptd.net >>:On-Topic and Off-Topic Posts >>Subject: Re: IBM 5150 >> >>On 2/28/13 9:43 AM, TeoZ wrote: >> The ROM say IBM 1981, this unit must be early, Serial # 0155185 (did >> they start from #1?). >> >>I was told by David Both that he used the very first PC off the >>assembly line to write the PC Documentation. When I asked what >>happened to PC #1 after he was done with it he said as far as he knew >>the same thing they did to all their internal use machines at the time. >>Stripped it for parts for warranty repairs. >> >>Mark >> >> >> So I guess I have to find an original IBM CGA card then and all is well? >> >> ----- Original Message ----- From: "Christopher Satterfield" >> <christopher1400 at gmail.com> >> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> >> Sent: Thursday, February 28, 2013 3:53 AM >> Subject: Re: IBM 5150 >> >> >> I believe your VGA problem has to do with the older IBM ROMs, I >> believe you need the '82 BIOS to use a VGA card or any card with it's >> own BIOS, and being as I have a 16-64 KB 5150 with the newer BIOS I >> assume yours will work also, saying you have an EPROM programmer. >> >> -- >> C:\win >> Bad Command Or File Name >> C:\ >> >> >> >> >>-- >> >> From the eComStation Desktop of: Mark Dodel >> >> Warpstock 2013 - http://www.warpstock.org Warpstock Europe 2013 >> -http://www.warpstock.eu >> >> >>For a choice in the future of personal computing, Join VOICE - >>http://www.os2voice.org >> >> "The liberty of a democracy is not safe if the people tolerate the >>growth of private power to a point where it becomes stronger than their >>democratic State itself. That in it's essence, is Fascism - ownership >>of government by an individual, by a group or by any controlling >>private power." Franklin Delano Roosevelt, Message proposing the >>Monopoly Investigation, 1938 >> >>----- >>No virus found in this message. >>Checked by AVG - www.avg.com >>Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: >>02/27/13 >> >>----- >>No virus found in this message. >>Checked by AVG - www.avg.com >>Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: >>02/27/13 >> > > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 >

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 9:18 AM PST Fred Cisin wrote: >> >Surely, we would NEVER have discussed the Raspberry Pi, if you hadn't >> >asked about that damned Acorn! >On Wed, 27 Feb 2013, Chris Tofu wrote: >> I was only stating I was indirectly responsible for this current iteration :O > >Not to worry, >We DO hold you responsible for it Of course!! Everything that goes wrong on the list is my fault! Boy I tell ya!

13 years, 5 months

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IBM 5150

by teoz＠neo.rr.com

I snagged an original IBM 5150 early model and have a couple questions about it. The unit turns on fine and tries to boot from the first floppy drive as far as I can tell, I don't have a MDA monitor and that is what card it came with. When I try a VGA 8 bit card (or my Everex EGA set to CGA) I don't get a screen and it doesn't boot from the floppy (I change the switches 5,6 from OFF/OFF to ON/ON for VGA/EGA). I tried a Taxan Super Color Graphics card but my CGA monitor just shows a few lines scrolling, seems like that card isn't standard CGA. Not sure how much RAM this thing has either. The 16-64K motherboard has 4 full banks, there is a 64K RAM card installed, and I have a MBI Monte Carlo multi function board with 4 banks full of RAM. Anybody have any information on the MBI board, there are 2x 8 block configuration switches on it that would tell me how it is set up. Also the RAM switched on the 5150 are set to OFF, OFF, OFF, OFF, OFF, ON, OFF, OFF which doesn't seem to jive with the setting options here: http://www.rci.rutgers.edu/~preid/pcxtsw.htm There is some damage to the board (was shipped with the PS loose and there is a ding by U26), not sure what that might hurt. Thanks, TZ

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

>Surely, we would NEVER have discussed the Raspberry Pi, if you hadn't >asked about that damned Acorn! I was only stating I was indirectly responsible for this current iteration :O

13 years, 5 months

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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 6:43 AM PST TeoZ wrote: >The ROM say IBM 1981, this unit must be early, Serial # 0155185 (did they start from #1?). Don't know where they started, but was told at a company I worked for years ago we had one somewhere under #100. >So I guess I have to find an original IBM CGA card then and all is well? I have a Paradise card that I thought was an early enhanced.CGA model, but might be EGA. I could test it if you're interested and I'd trade you for the Taxan card

13 years, 5 months

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OT: Linux-to-OpenBSD device drivers

by barythrin＠gmail.com

In freebsd there's a linux compatibility library/package at least for binaries but I'd be surprised if there wasn't something similar for compilation. Also freebsd (not openbsd but they're all a family so port is likely) I used ndis to use the windows driver for a not supported at the time wireless card in bsd. Not sure if that would be in line with other drivers as well.

13 years, 5 months

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RGB -> VGA adaptors (was: Re: Tek 4317)

by mtapley＠swri.edu

(also sent to cctalk, but doesn't look like it came through; apologies if duplicates) Some searching on the Color Computer site leads to this: http://miba51.com/CoCo_VGA_Adpater.html Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA. At one point, another was available from Chris Hawks http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638 I have no experience with either, nor any connection except being a fellow CoCo user. Hope this helps. At 16:39 -0600 2/26/13, <Sander> wrote: >Message: 12 >Date: Tue, 26 Feb 2013 13:29:38 -0700 >From: Richard <legalize at xmission.com> >To: cctalk <cctalk at classiccmp.org> >Subject: Re: Tek 4317 >Message-ID: <E1UAR9e-0000zT-PL at shell.xmission.com> > > >In article <201302260715.r1Q7FiJL027219 at ls-al.eu>, > Sander Reiche <reiche at ls-al.eu> writes: > >> Richard <legalize at xmission.com> wrote: >> > >> > I have other Tektronix hardware from this time frame and the video >> > output tends to be standard RGB (possibly synch-on-green) BNC >> > connectors. >> >> I'm still pursuing this, but it's taking its time. >> > > Are there any good converters for RGB? Like to VGA? > >Based on this picture, it appears that it would have RGB BNC connectors. ><http://user.xmission.com/~legalize/tmp/vintage/tektronix/xd88/20120417_1304…> > >That implies synch-on-green video signalling. If you don't have a >synch-on-green RGB monitor, then you'll need an adapter to convert >that to VGA (which splits the synch signals out on a separate pin). >These shouldn't be too hard to find because synch-on-green was fairly >common. >-- >"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> > The Computer Graphics Museum <http://computergraphicsmuseum.org> > The Terminals Wiki <http://terminals.classiccmp.org> > Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com> -- - 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, 5 months

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Garbage on screen when using real VT100 on emulated PDP-11

by earl＠retrobits.com

Also posted this question in the Vintage Computer Forums. OK, I'm stumped. I'd like to use a real VT100 as a terminal with an emulated PDP-11 running RT11. When the VT100 is connected to a real PDP-11, it works fine. When connected to the emulated PDP-11, garbage characters begin to appear on the screen when, say, doing a DIR command. The garbage always starts in exactly the same place in the DIR listing. After that, garbage characters (grey squares) become interspersed with the good text. I have tried this with SIMH under Linux, connecting the VT100 to the serial console port of the Linux machine. I've also tried it under E11, using that program's built-in serial terminal capacity. Same exact error in both cases. I've looked at the RT11 SET command for TT: to see if there are any applicable parameters. Can't find any. I've set the SIMH TTO device to all its possible settings: 7B, 7P, 8B, and UC. Same stuff in all cases. I've looked at the serial settings on the VT100 to ensure 8 bits, no parity, and correct baud rate. All good. The VT100 works fine with the Linux box doing Linux-ey things. No character corruption when doing a big "ls" listing, OK with vi, etc. The SIMH and E11 emulators work fine in their virtual consoles, with no character corruption when doing a DIR, etc. Any ideas? I'd really like to, for instance, get my Raspberry Pi to be a mini PDP-11 system, but I can't get past this character garbage when using the real VT100. Help appreciated! And thanks for reading! - Earl

13 years, 5 months

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PDP8 Omnibus to USB interface

by hachti＠hachti.de

Hi folks, I'd like to introduce my newly designed Omnibus-USB interface. I designed a quite well working prototype of something that looks like a KL8E for the PDP8 and like a serial port on the PC - but is none of both :-) It ist not meant as a console terminal replacement (which it could be used as) but as an alternative IO device used to dump (archive!) and restore mass storage media. To the people who don't know the problems of having MASSES of disks and tapes to dump: Please don't flame. Pictures and some more information can be found on my website: http://pdp8.hachti.de?gallery/omnibus_usb My intention is to design an improved (probably full height) version and do a little production run. As I'm currently out of work, selling those boards could help a bit. I can do it only if I get enough preorders. So I ask everybody with serious interest to tell me how many boards he wants and how much he could spend. Based on that feedback I'll decide if I can do it and fix a price. It won't be cheap - but very helpful and cool! I'd really like to make some more. It would be great if there's enough interest to do it. If you have any suggestions, let me know! Kind regards, Philipp :-) -- Dipl.-Inf. (FH) Philipp Hachtmann Buchdruck, Bleisatz, Spezialit?ten Alemannstr. 21, D-30165 Hannover Tel. 0511/3522222, Mobil 0171/2632239 Fax. 0511/3500439 hachti at hachti.de www.tiegeldruck.de UStdID DE 202668329

13 years, 5 months

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Strobe plotter documentation or information?

by Carl.Claunch＠gartner.com

I have it all worked out and tested. It was a parallel IO board using an 8255A, with TTL signals driving the two stepper motors and pen solenoid. TTL 5V signal to one of the four poles of the uniphase stepper motors moves it 3.6 degrees, the operator buttons are reported as inverted TTL signals, no protocols or intelligence at all in the plotter so my job was dead simple. The 20 wire ribbon cable is the six button inputs, the eight stepper motor outputs and the pen solenoid output, plus a ground return. The operator buttons, for example to move the pen to the right, are sent to the computer whose driver would have to step the motor, rather than occurring locally in the plotter. Did I mention that it had zero digital logic chips or intelligence? Nine transistor drivers, a power supply and a few pullup and current limiting resistors, plus the steppers, solenoid, switches and buttons. If anyone else ever needs one, I have documented the cable assignments here so that they are searchable on the web. I will also mention the S-100 bus card assignments to the 8255A ports in case someone wants to use it with a retro machine through the interface card. Pins 1, 2, 4 and 5 are not connected. Pin 3 is ground Pin 6 is inverted TTL input, status of the "start/enter" button on the cover, port PA5 Pin 7 is the central "fast" button for pen movement, inverted TTL input, port PA4 Pin 8 is the "pen right" button, inverted TT input L, port PA3 Pin 9 is the "pen left" button, inverted TTL input, port PA2 Pin 10 is the "pen down" (actually rotate drum and paper up) button, inverted TTL, port PA1 Pin 11 is the "pen up" button, inverted TTL input, port PA0 Pin 12 is the output to activate the pen solenoid so that the pen is marking the paper, TTL 5V to activate, port PB4 Pin 13 is the output for one pole of the drum movement stepper motor, TTL 5V on this and 0 on the other three, port PC3 Pin 14 is the output for a second pole of the drum movement stepper motor, TTL 5V activates, port PC2 Pin 15 is the output for a third pole of the drum movement stepper motor, TTL 5V activates, port PC1 Pin 16 is the output for a fourth pole of the drum movement stepper motor, TTL 5V activates, port PC0 Pin 13 is the output for one pole of the pen left-right movement stepper motor, TTL 5V on this and 0 on the other three, port PB3 Pin 14 is the output for a second pole of the pen left-right movement stepper motor, TTL 5V activates, port PB2 Pin 15 is the output for a third pole of the pen left-right movement stepper motor, TTL 5V activates, port PB1 Pin 16 is the output for a fourth pole of the pen left-right movement stepper motor, TTL 5V activates, port PB0 For those not familiar with stepper motors, they have four poles each with a ring of 25 'teeth' that will attract a permanent magnet on the rotor. The four rings are staggered so that in total there are 100 positions around the dial - 3.6 degrees per step. Energize one pole and the magnet is held to the nearest tooth of that pole. Drop that pole and activate another whose tooth is adjacent and the rotor swings one position to hold at the tooth on that pole ring. Interface is a simple four bit circular shift register with one high and three low bits circulating in the pattern. Shift it once and the motor moves one step in the associated direction. Carl ________________________________ This e-mail message, including any attachments, is for the sole use of the person to whom it has been sent, and may contain information that is confidential or legally protected. If you are not the intended recipient or have received this message in error, you are not authorized to copy, distribute, or otherwise use this message or its attachments. Please notify the sender immediately by return e-mail and permanently delete this message and any attachments. Gartner makes no warranty that this e-mail is error or virus free.

13 years, 5 months

2
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Dust-cover material

by wilson＠dbit.com

This is a dumb one, but: There used to be commercially available dust covers made out of translucent plastic (vinyl???) that fit over terminals, monitors, printers etc. (and I think there was a full line of custom-fit ones for ham rigs too). It seemed silly at the time but now that I'm chest-deep in old computers/terminals/ peripherals, some of the stuff goes many years between uses and the dust is a real problem. So ... I have a sewing machine (yes older than my computers and come to think of it, it gets dusty too) and more patience than I deserve, but I can't find a source for the kind of plastic sheeting I mean. Hardware-store drop cloths are too flimsy (might as well just use a trash bag) and I've gotten nowhere googling, but maybe that's just because I don't know the correct name. Anyone know what I'm talking about, and where to get it by the yard etc.? Thanks! John Wilson D Bit

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

I'm sure many will agree this exchange is one for the annals. I can't stop laughing. And to think I started it all by yelping about that damned Acorn!

13 years, 5 months

2
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

http://www.extremetech.com/computing/148482-the-true-cost-of-a-raspberry-pi… I'm still not knocking it. But what adult male is going to want a Pibow??? Oi vay My idea of a generic netbook case with perhaps a few exchangeable bezels to accommodate various surplus lcd's makes more sense to me. But I hear no mention of the pi supporting a raw lcd panel, like my pmmx sbc's do. Is there any provision for that at all?

13 years, 5 months

1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Wed, Feb 27, 2013 1:55 PM PST Tony Duell wrote: >Programming I will grant you, although $deity help you to figure it out ... *puzzled look* Is that particular $deity more responsive based on what you toss in the plate? Perhaps we can arrange a sort of $group $buy wink wink and coerce said $deity into getting a truly hackable piece of fruity dessert on the market.

13 years, 5 months

1
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PDP-11 / Unibus: config info for Motorola Memory Systems MMS1117 MOS board?

by js＠cimmeri.com

cctalk-request at classiccmp.org wrote: > Subject: > Re: PDP-11 / Unibus: config info for Motorola Memory Systems MMS1117 > MOS board? > From: > ard at p850ug1.demon.co.uk (Tony Duell) > Date: > Sun, 24 Feb 2013 19:37:05 +0000 (GMT) > > To: > cctalk at classiccmp.org > > >> >> > Folks, I'm restoring an 11/34A. One of the MOS memory boards it came >> > with is a circa 1979 Motorola model "MMS1117", variation "58 PC" >> > (64KWords / 18 bits / w/parity). Would like to know if anyone out >> > there has configuration information for this seemingly uncommon board? >> > It's a very high quality board and has socketed RAM, so it'd be >> > especially nice to be able to keep using it. It has 5 switch packs >> > (only 2 of which have markings) and at least a dozen jumpers. >> > > I had a similar problem when I got my first PDP11 (a PDP11/45). The donor > had wanted to keep the memory that was used in it, he gave me what I > later discoveed to be a 32KW MUD board (actually, it could be populated > right up to 128KW, of course only 124K of those would be useable). I had > no idea how to set the swiches, or indeed, what sort of backplane wiring > I would need to use it . > > This was logn before the days of the web. so there was no way to ask > others what to do. > > And I got it working. I spent a few weeks tracing out the scheamtics of > the unknown board and figuring out just what all the switches and jumpers > did. A long job, sure, but IMHO worth it. > > -tony Wow. Do you recall how many layers the PCB had? I'd be interested in seeing a sample scan of the schematic you laboriously produced, just to get an idea of technique. The web has certainly made hobbies like this unimaginably easier, if not just possible at all. - jS

13 years, 5 months

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Garbage on screen when using real VT100 on emulated PDP-11

by cctech＠beyondthepale.ie

> > The VT100 doesn't need padd characters IIRC (VT05 and VT52 definitely > do), but it uses a signalling scheme to tell the host that it's > internal buffer is full. This signalling scheme can be either in the > hardware signalling (DTR/CTS) or it can be XON/XOFF (DC1/DC3) control > characters in the data stream. > According to my VT102 manual, DTR is only turned off when the terminal is offline or performing a line disconnect. It doesn't seem to turn off DTR or any other signal in response to the input buffer becoming full. Under "Input Buffer Overflow Prevention", it goes on to say that there are three methods of input buffer overflow prevention and lists XON/XOFF, fill characters and low speed operation. A table shows the requirement for fill characters for various functions at various baud rates. It suggests that all functions require at least one fill character (null) at 9600 baud, even when not in smooth scroll mode. Regards, Peter Coghlan

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

Now now Mardy. We can disagree w/o being hilarious. ------------------------------ On Tue, Feb 26, 2013 7:08 PM PST Mardy Marshall wrote: >Raspberry Pi - The Chia Pet of Personal Computers > >-Mardy >

13 years, 5 months

1
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WAMECO FPBC-1 photo mask images

by nekonoko＠mac.com

Does anyone have any photos/drawings of the WAMECO FPBC-1 photo mask for the FPB-1 front panel board? I'm planning on recreating one as finding a stock photo mask is likely impossible at this late date. Thanks much, Pete Plank

13 years, 5 months

1
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Looking for: SWTPC MP-S Serial Interface

by chrise＠pobox.com

On Wednesday (02/27/2013 at 09:58AM -0500), Bill Sudbrink wrote: > > > > I have a SWTPC 6800, but it came with the MP-C. I was thinking of > > building an MP-S with an additional baud rate clock, to get a higher > > speed than the MP-C. > > I may have a spare MP-C. You do know that SWTBUG/MKBUG will operate > an MP-C in slot 1? You don't "need" an MP-S to get your 6800 up. yes-- as I noted to Josh in a private message, SWTBUG would be required to run the MP-S as the console. The original SWTPC 6800 design used MIKBUG and the console interface was an MP-C. SWTBUG was released later as an upgrade ROM and it could support either an MP-C (original equipment) or an MP-S (upgrade) as the console. So, you really need to confirm which monitor ROM the system has to decide what you can or need to do for the console interface. Chris -- Chris Elmquist

13 years, 5 months

3
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For Sale: Macintosh SE/30 and Apple IIGS Monitors

by slandon110＠gmail.com

Hate to part with this one, but it never gets used Mac SE/30 68MB RAM 80MB HDD Ethernet Card Apple Extended Keyboard II Spare 2GB HDD so you can upgrade it. This is one of the models that will run A/UX and NetBSD $300 shipped insured via USPS Priority mail. Also have 15khz Apple IIGS monitors for $50 shipped each

13 years, 5 months

1
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Looking for: SWTPC MP-S Serial Interface

by derschjo＠gmail.com

Subject line says it all -- I picked up a-nearly- complete (and very very extremely dirty and full of mousedetritus) SWTPC 6800 but I'm missing the MP-S serial interface (which will eventually be necessary to doanything too useful with it once I've given the rest of the machine a good soak). Anyone have one going spare or have any leads? Thanksas always, Josh

13 years, 5 months

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Garbage on screen when using real VT100 on emulated PDP-11

by cctech＠beyondthepale.ie

> > > > OK, I'm stumped. I'd like to use a real VT100 as a terminal with an > > emulated PDP-11 running RT11. > > > > When the VT100 is connected to a real PDP-11, it works fine. When connected > > to the emulated PDP-11, garbage characters begin to appear on the screen > > when, say, doing a DIR command. > > > > The garbage always starts in exactly the same place in the DIR listing. > > After that, garbage characters (grey squares) become interspersed with the > > good text. > > Too high a data rate without flow control. Either enable Xon/Xoff on > both ends or > use hardware control (most PCs do not support that correctly). > > If all else fails set the baud rated to something slower till the > problem goes away. > My VT102 manual describes the grey hatched squares as the substitute character and says they are displayed when the input buffer is full and characters are lost. It also suggests that hardware flow is not available and the only solutions are XON/XOFF, fill characters (nulls) or low speed operation. I strongly suspect the VT100 behaves the same. Appendix E "VT102/VT100 DIFFERENCES" doesn't suggest otherwise although it does say that the VT102 uses a different numbers of fill characters. Regards, Peter Coghlan

13 years, 5 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 8:16 PM PST Ethan Dicks wrote: >So the Internet was not invoked in the purchase of _my_ Pi. > >-ethan I may have heard about it on this list. But the next mention or the first was in a magazine, Linux Format probably.

13 years, 5 months

1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 6:45 PM PST Doc Shipley wrote > My first foray into hot rods was a carburetor swap, not a full engine >build. I'd never have finished a motor if I'd jumped right into the >deep end. But an entry point can be a Peter Norton book or something like it or interpreted BASIC. Some people, not you, are disgusted with anything done the old ways. To my knowledge, the only way to create a laboratory quality flat piece of cast iron is with a blasted chisel. Newer ways of doing things need to be persued of course. You have to anticipate critiques on a list such as this. I alluded to a discussion with another lister about a 14 year old kid learning how to fix crt based displays. Is there one person on this list who isn't impressed with such a mind? Same kid taught himself calculus. But maybe it's best to break him of that interest in such old crap. It isn't all twitter, facebook and the rest of the garbage with the youngsters and thank God. Nothing against Rpi, just that it's definition of hardware hacking differs from some. Although I generally have an interest in it, and more so after this discussion, there still remains a void when it comes to learning chip level interfacing, leggo style.

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 2:01 PM PST Doc Shipley wrote: > My take on the Raspberry Pi is that it offers EXACTLY what it claims to offer. A cheap, accessible ENTRY POINT into programming and/or hardware hacking. It seems to be more about high level hardware interfacing then hardware hacking in the purest sense - chip level interfacing. Building or modifying a sbc, even a very rudimentary one, from discrete parts is more of what I would expect, and what I did expect when I first heard of it. Or being able to add some sort of functionality, etc.

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Strobe plotter documentation or information?

by Carl.Claunch＠gartner.com

On 26/02/2013, Dave wrote: >I found another for sale here, but I can't really afford to buy it and >ship to the UP.... > >http://www.bonanza.com/listings/Strobe-Graphics-System-Plotter-for-Apple-II… I agree. I spotted that one as well when searching, but $499 is way too much to pay to get a manual. Carl ________________________________ This e-mail message, including any attachments, is for the sole use of the person to whom it has been sent, and may contain information that is confidential or legally protected. If you are not the intended recipient or have received this message in error, you are not authorized to copy, distribute, or otherwise use this message or its attachments. Please notify the sender immediately by return e-mail and permanently delete this message and any attachments. Gartner makes no warranty that this e-mail is error or virus free.

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Raspberry Pi

by lproven＠gmail.com

On 26 February 2013 00:50, Zane H. Healy <healyzh at aracnet.com> wrote: > > It looks like some sort of AROS distro might be an option as well. Ah, yes, I'd forgotten about that. Yes, the AROS team are working on an ARM version, but AFAIK, at the moment, it can only run loaded as an application running under ARM Linux with X.11 or possibly under QEMU. It cannot yet actually boot on ARM hardware. Given that the Rpi struggles a bit with graphical Linux anyway, it's not really an alternative at the moment. But if or when they ever do produce a native-booting version, that will indeed be an option. AROS is small, slim and fast compared to modern x86 OSs - although it's relatively feature-poor, and like the AmigaOS 3 that it seeks to replicate, it has no VM, no memory protection, no user security or anything. It does have a TCP/IP stack and Web clients, though.] At the moment, TTBOMK, there are 4 OSs that run on Rpi: * Linux, obviously, as used on 99% of Pis * RISC OS - a feature-complete port, but so far lacking graphics acceleration etc. * Preliminary just-about-booting ports of NetBSD and FreeBSD There'a a boot manager but I am not sure it can handle anything except Linux: http://www.berryterminal.com/doku.php/berryboot -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

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Gates, Zuckerberg urge kids to code

by tom_a_sparks＠yahoo.com.au

" Microsoft chairman Bill Gates, Facebook CEO Mark Zuckerberg and Twitter creator Jack Dorsey are among the tech celebrities in a new video to promote the teaching and learning of computer coding in schools. Titled What most schools don't teach, the video released online on Tuesday begins with Zuckerberg, Gates and other tech icons recalling how they got their start in coding. For some, it was in sixth grade. For others, such as Ruchi Sanghvi, Facebook's first female engineer, it happened in college. Running less than six minutes, the video promotes Code.org, a non-profit foundation created last year to boost computer programming education. "The first time I actually had something come up and say 'hello world,' and I made a computer do that, that was just astonishing," recalls Gabe Newell, president of video game studio Valve. But it's not just tech leaders promoting programming in the video. Chris Bosh, a Miami Heat basketballer, says about coding: "I know it can be intimidating, a lot of things are intimidating, but, you know, what isn't?" Code.org was founded by tech entrepreneur Hadi Partovi, an early investor in Facebook, Dropbox and the holiday rental site Airbnb. The organisation aims to address a problem often cited by tech companies - not enough computer science graduates to fill a growing number of programming jobs. The group laments that many schools don't even offer classes in programming. "Our policy is literally to hire as many talented engineers as we can find," Zuckerberg says in the video."The whole limit of the system is there just aren't enough people who are trained and have these skills today." ?" - http://au.news.yahoo.com/a/-/world/16250929/gates-zuckerberg-urge-kids-to-c… --- tom_a_sparks "It's a nerdy thing I like to do" Child of the Internet born 1983 Please use ISO approved file formats excluding Office Open XML - http://www.gnu.org/philosophy/no-word-attachments.html Ubuntu wiki page https://wiki.ubuntu.com/tomsparks

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WTB: DEC Multia/UDB (DPS-75TB, 75.24 W) PSU

by marcogb＠xs4all.nl

Does anyone have a Delta Electronics DPS-75TB 75.24 W power supply unit, perhaps a spare one and willing to sell/trade it? To clarify, it's the one found in the Digital Multia/UDB, or the VX40 of mine at least. I may also be interested in a full Multia/UDB, maybe a VX41, or a gutted one even (as long as the PSU still works fine). I may also consider a similarly-sized DEC 3000. Thanks in advance. - MG

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 3:42 PM PST Liam Proven wrote: >On 26 February 2013 23:33, Liam Proven <lproven at gmail.com> wrote: > >I don't know how that got sent half-done! Did you send it from a pi? >> To a child born in the developed world this century, the Web is part >> of life, always there at megabit speeds, as ubiq > >... as ubiquitous as air. Computers have GUIs, windows, taskbars etc, >and come with a web browser, as does even a cheap basic old phone or >pocket music player. Games are real-time 3D, even ones on a cheap 2- >or 3- generation old games console such as might be given to >preschoolers to play with. > >No, a BBC Micro or anything from the 1980s is not a suitable teaching >tool. It is a flint axe when the kids grew up with sliced bread. It is >a dugout canoe when grandad and grandma go yachting at the weekend. nobody uses flint axes. But they do fashion numerous tools and even build their own boats sometimes. >The mere idea is laughably unrealistic. > >If you are teaching a kid to drive, you don't teach them how to build >the car first. But the first drivers of cars needed to know a lot more about them if they wanted successful outings. You don't need to know a single thing about mechanics to drive. But to be a mechanic.you do need to know how to dismantle and reassemble a car. The "kids" already know how to "drive", turn on their computers and do basic tasks. What in the world does that have to do with anything. >If you're teaching them to maintain a car, you don't teach them how to >design and construct an engine first. Another analogy that doesn't quite seem appropriate. >So, no, actually, tools like BASIC and assembly code have no >relevance today, not really. Because the days when a BBC Micro was a >computer are so long ago that these kid's *parents* don't even really >remember them. I took a class and my first foray into BASIC was on an Atari 400 w/membrane k/b. Rest assured I will never forget. >A BBC Micro is not a computer any more, because it is 2013 now. People >live in space and have a Dynabook containing the entire Hitch-hiker's >Guide to the Galaxy in their pockets - it is normal for them to have >access to basically the entirety of human wisdom, wirelessly - because >even their parents don't remember phones that attached to *wires >coming out the wall* - because these are things so cheap that even the >kids in India and China are getting them now. You engaging in delusion. At least 1/2 of the US still maintain landlines, in addition to mobile phones. If you haven't been in a hurricane lately you may not be able to appreciate their utility when cellular networks crap the bed. >Assembly code is equivalent to how to chip a sharp arrowhead from a >piece of flint. Every flippin thing that runs on any computer in the world is running assembly instructions. Assembler or analysis thereof is NEVER going away. >BASIC is equivalent to learning how to smelt iron. LOL and how many groups and community colleges are engaging in that these days. If you're unaware foundry work has seen quite a resurgence in the last 15 years. And the point being you still and for a long time will need people who understand the rudimentary elements and processes that make up the tools we use every day. If for no other reason they just are curious. How ironic that just today I had an offline conversation about a 14 year old kid who's fixing CGA monitors for extra cash!!! >And the Raspberry Pi is a kids' computer that is cheaper than giving >them that old dusty Pentium 4 in the attic, because [a] you'd have to >get the P4 working again and install software on it, [b] it's a huge >noisy ugly piece of *office equipment* and not something a kid would >want to play with, and mostly because > >[c] The Raspberry Pi costs less to buy than the electricity used by >that P4 running every evening for a significant chunk of a year. But it doesn't teach bare fundamentals. That's the point everyone is trying to make it seems. >-- >Liam Proven ? Profile: http://lproven.livejournal.com/profile >Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven >MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven >Tel: +44 20-8685-0498 ? Cell: +44 7939-087884 >

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 3:23 PM PST Dave wrote: >> Absolutely. I suspect for many people it appeals because it's a cheap computer, and they don't really have a particular use in mind for it (so it doesn't matter that it's rather middle-ground for so many situations). >> > >https://raspberryjamboree-es2001.eventbrite.com/# Being that at least it somewhat lends itself to general purpose computing, someone should devise a case, charging circuit, etc. that would facilitate the piecing together of a low cost portable/netbook, where more or less standard batteries, lcds, keyboards etc can be added.

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RGB -> VGA adaptors (was: Re: Tek 4317)

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 3:12 PM PST Mark Tapley wrote: >Some searching on the Color Computer site leads to this: > >http://miba51.com/CoCo_VGA_Adpater.html > >Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA. >At one point, another was available from Chris Hawks > >http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638 > >I have no experience with either, nor any connection except being a >fellow CoCo user. > >Hope this helps. Everyone is building scan doublers these days it seems. Princeton probably made the first one. Amiga had at least one flicker fixer, which is a bit different, the issue there being correcting interlaced video.

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at least one of the best ways to learn computing was Re: Raspberry Pi

by rampaginggreenhulk＠yahoo.com

Ok ------------------------------ On Tue, Feb 26, 2013 2:59 PM PST Jim Stephens wrote: > >On 2/26/2013 1:42 PM, Chris Tofu wrote: >> I haven't looked at the pi much, besides reading an article some time ago somewhere. At first glance I can't see how it can help a person learn hardware. No clue on that one. >The way that it helps with education and learning is that instead of telling someone to go buy and dedicate a laptop or other machine to a lab purpose, and download say a DVD to load it one can tell them to obtain a Pi and an SD card image to boot it on. > >There are several examples of lab setups where this is already done both by attaching adapters to outside things (relay boards, etc.) and another which attaches to a breadboard. > >The pi is not going to be the focus of the vast majority of these things, but will be the computer vehicle that delivers the educational setup. > >It can be the center of a lesson say to learn to program things that require only what it has to interact with, keyboard, mouse an display, plus for the model b adding in a network. > >Instead of picking up $25 random ecycled machine this is intended to replace that role. Also if the need arises in the right setting it can be the focus of the lesson. I hear you. I never suggested it was useless, nor uninteresting. I find what I have learned about interesting myself. But as I stated in the other post it's not about h/w hacking as I define it, though it may be a valid very current use of the terms. >One suggested in these threads, "what not to plug into the gpio pins". Screwing up that lesson costs you another Pi. I suspect there will be people who will jump in and plug thing in randomly, but they won't get far. I suspect most people will figure out what to do with what is there. Ok. But blowing an IBM mainboard due to mishap could require a lot of chips LOL or maybe only a few.

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at least one of the best ways to learn computing was Re: Raspberry Pi

by rampaginggreenhulk＠yahoo.com

Where are you anyway? Canada or US? What about a clone? I might be able to find you one of those. And you're totally w/i your rights to decline, just please don't because it ain't an IBeeMer. Even an Apple might be a possibility. I can't control shipping costs, USPS isn't too bad usually, but maybe for 20-30$ I could rustle you up something. Would ship from 07731 NJ. Point taken though. But for as many people that truly want to learn discrete h/w, there is always something available for 100-150$. And often much less. One of the coolest projects I've seen to date is the Radio Electronics RE Robot brain, 80188 based. I have everything - schematics, artwork, firmware images, even a contact (named Chris!) who built the whole robot. Gernsback used to have a bbs. What I wouldn't do for those archives. But at least I have all the raw materials, and a "revolutionary" new way of making pcb's _at_home_, that works all the time I'm told. And the project is at least somewhat tried and true,being it was an actual board manufactured by Vesta Technology, who's still around. Hey Jules, I have a dead 5160 mainboard with some weird wire routing going on. For shippage. ------------------------------ On Tue, Feb 26, 2013 2:53 PM PST Jules Richardson wrote: >On 02/26/2013 03:42 PM, Chris Tofu wrote: >> Apples and IBMs are somewhat plentiful. > >Hmm, I'd love to find an Apple II or an IBM 5150 (or '60, but I'm not too bothered about having a hard disk). I don't think there are any even remotely nearby though, which means shipping (and worse still, the possibility of ebay prices)

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Raspberry Pi

by lproven＠gmail.com

On 25 Feb 2013 18:26, "Zane H. Healy" <healyzh at aracnet.com> wrote: > > The talk about the Acorn and RISC OS reminds me that I've been interested in one of these, primarily to run RISC OS. What is the recommended version, price, and place to get a Raspberry Pi from? > > I assume I want a "2.0 Model B 512Mb"? I've found a seller on eBay with this and they include a case for $57. If you want to keep it super cheap, try to find a Linux user upgrading to the 512MB version. 256MB is a vast amount of RAM for Risc OS, whereas it is not enough for a graphical Linux desktop. You really don't need half a gig for Risc OS, unless of course you want to run Linux as well.

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RGB -> VGA adaptors (was: Re: Tek 4317)

by mtapley＠swri.edu

Some searching on the Color Computer site leads to this: http://miba51.com/CoCo_VGA_Adpater.html Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA. At one point, another was available from Chris Hawks http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638 I have no experience with either, nor any connection except being a fellow CoCo user. Hope this helps. At 16:39 -0600 2/26/13, <Sander> wrote: >Message: 12 >Date: Tue, 26 Feb 2013 13:29:38 -0700 >From: Richard <legalize at xmission.com> >To: cctalk <cctalk at classiccmp.org> >Subject: Re: Tek 4317 >Message-ID: <E1UAR9e-0000zT-PL at shell.xmission.com> > > >In article <201302260715.r1Q7FiJL027219 at ls-al.eu>, > Sander Reiche <reiche at ls-al.eu> writes: > >> Richard <legalize at xmission.com> wrote: >> > >> > I have other Tektronix hardware from this time frame and the video >> > output tends to be standard RGB (possibly synch-on-green) BNC >> > connectors. >> >> I'm still pursuing this, but it's taking its time. >> > > Are there any good converters for RGB? Like to VGA? > >Based on this picture, it appears that it would have RGB BNC connectors. ><http://user.xmission.com/~legalize/tmp/vintage/tektronix/xd88/20120417_1304…> > >That implies synch-on-green video signalling. If you don't have a >synch-on-green RGB monitor, then you'll need an adapter to convert >that to VGA (which splits the synch signals out on a separate pin). >These shouldn't be too hard to find because synch-on-green was fairly >common. >-- >"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> > The Computer Graphics Museum <http://computergraphicsmuseum.org> > The Terminals Wiki <http://terminals.classiccmp.org> > Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com> -- - 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.

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OT: WWVB clock with silent movement

by aek＠bitsavers.org

We just went through another round of replacing battery clocks at the radio station and I've been going crazy trying to find one that is auto-set AND has a continous-sweep second hand. You can find a dozen Chinese manufacturers, but none in the US retail market.

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at least one of the best ways to learn computing was Re: Raspberry Pi

by rampaginggreenhulk＠yahoo.com

This follows Tony's reply. I have little knowledge of DEC stuff and no knowledge of Beebs. I was sort of surprised that a PDP-8e's boot sequence is very similar to a peecee's, but this is fundamental to computers really, and this I had to learn. Apples and IBMs are somewhat plentiful. The Commie 64 has a bit too much custom logic, even a Mac has less in reality. Not a huge Apple II fan, but it seems to have little or none. A 5150 mainboard has zero custom logic, not even a pal unless I'm mistaken (and there's validity in the argument that a smidgeon of custom logic enhances learning - in that it would be a comprehensive example). There are undoubtedly many examples that would nicely fit the bill (and if you wanted to FORCE yourself to learn and delve into assembler and whatnot, get a Tandy 2000! It don't run squat, besides a handful of items that were modified for it, bizarro scientific and accounting packages. Zork. Hooray. Conspicuous by it's absence on the list is Starflight! Why - why WHY!!!). I haven't looked at the pi much, besides reading an article some time ago somewhere. At first glance I can't see how it can help a person learn hardware. No clue on that one.

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 1:21 PM PST Fred Cisin wrote: >On Tue, 26 Feb 2013, Tony Duell wrote: >> But I do wonder jhsut who the Rpi is aimed at. Given that you need a PC >> and its peripherals (keyboard, mouse, monitor) to use the Rpi, I wonder >> if it wouldn't be simpler jsut to install a free C compiler on said PC, >> at least to learn programming. > >'twould make sense. >A generic 5160 is a fine machine to learn certain stages of programming >on. > > >but, in wasteful cultures, like we have here, can pick up a eMachines or >Packard Bell on the curb on trash day, and use it to flesh out a Raspberry >Pi? You know there might be a burgeoning demand for old eMachins and PBells soon. Or perhaps some should design a sbc that could take their place.

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OT: WWVB clock with silent movement

by tshoppa＠wmata.com

I think there was also an "Accutron" clock movement that could be driven from 60kHz. I think this movement was in at least some HP timekeeping instruments. In any event those were not truly silent either... put an Accutron up to your ear and you hear a high-pitched hum/buzz, not tick-tick-tick. -----Original Message----- From: Shoppa, Tim Sent: Tuesday, February 26, 2013 4:26 PM To: cctalk at classiccmp.org Subject: Re: OT: WWVB clock with silent movement Various "time-nuts" start off with GPS disciplined rubidium clocks, or radio clocks like WWVB, and derive a phase-locked 60Hz to run the old-fashioned 120VAC continuous-hand-movement analog and flip clocks (in my circle known as "NUMECHRON"s although I think the most applicable trademark was TYMETER). One example is: http://leapsecond.com/pages/atomic-nixie/ Obviously an HP 3325B is overkill as a 60Hz synthesizer but you get the idea. If you have WWVB carrier, 60Hz is just dividing by 1000, no funny numerator/denominator stuff.

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