test-drb March 2013

test-drb@ccmp.vtda.org

200 participants
326 discussions

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

11 years, 2 months

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

by rampaginggreenhulk＠yahoo.com

preferably not on the west coast.

11 years, 2 months

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

11 years, 2 months

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

11 years, 2 months

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) :

11 years, 2 months

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.

11 years, 2 months

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? >

11 years, 2 months

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

11 years, 2 months

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

11 years, 2 months

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.

11 years, 2 months

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test-drb March 2013