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

by GOOI＠oce.nl

Damn, I've been fooled by Edward! <grumble-grumble> Today is April 1st, and that is the day that everybody tries to fool everybody in Holland. I fell for it completely! Edward is also still looking for some RL slide sets, but he wrote that he had 10 sets ... I should have known that he was trying to fool me. I feel like a complete idiot. So, the question is valid again: who has a spare RL slide set? - Henk, PA8PDP. > I guess I have found a set! > I should have asked Edward first, before turning to the List. > I *knew* that Edward was also looking for a few sets, but I > did not know that his search was more succesfull than mine. > Since I have a few parts for Edward, I guess it will not be > long before the RL02 hangs in a rack :~) > > - Henk, PA8PDP. > > > > Hi all, > > > > I wanted to create more space on the floor, but I > > just can't seem to find a set of RL02 slides to > > mount the RL02 (standing on the floor) into a rack. > > Does anybody have a spare set for sale or trade? > > With regard to shipping costs I would prefer a > > location in Europe, but else "world" is ok! > > > > - Henk, PA8PDP.

21 years, 2 months

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searching for a set of RL02 slides

by GOOI＠oce.nl

I guess I have found a set! I should have asked Edward first, before turning to the List. I *knew* that Edward was also looking for a few sets, but I did not know that his search was more succesfull than mine. Since I have a few parts for Edward, I guess it will not be long before the RL02 hangs in a rack :~) - Henk, PA8PDP. > I wanted to create more space on the floor, but I > just can't seem to find a set of RL02 slides to > mount the RL02 (standing on the floor) into a rack. > Does anybody have a spare set for sale or trade? > With regard to shipping costs I would prefer a > location in Europe, but else "world" is ok! > > - Henk, PA8PDP.

21 years, 2 months

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WANTED : Manuals Philips Electrologica P 350 Series

by birs23＠zeelandnet.nl

Hiya, I am looking for manuals for the Philips Electrologica P 350 series systems. Its not for myself but it does has some urgency so if anyone has anything please let me know asap! Yours, Stefan.

21 years, 2 months

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searching for a set of RL02 slides

by GOOI＠oce.nl

Hi all, I wanted to create more space on the floor, but I just can't seem to find a set of RL02 slides to mount the RL02 (standing on the floor) into a rack. Does anybody have a spare set for sale or trade? With regard to shipping costs I would prefer a location in Europe, but else "world" is ok! - Henk, PA8PDP.

21 years, 2 months

1
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PET and the IEEE-488 interface Re: [OT]: CDC machines featured in "Die Hard"?

by pete＠dunnington.u-net.com

On Apr 1 2005, 1:04, Philip Pemberton wrote: > I need a minimum of 10x 10-32 UNF threaded bolts (aka "machine screws"), > 3/8in length (or 1/2in) and locking washers. I have absolutely no idea what > type of washer, but I'd guess it would be the variety with internal teeth. > > Basically I just need enough 10-32 bolts to hook five of these capacitors up. > The problem being that 10-32 is a standard size in the USA, but apparently > not in the UK. Any decent fasteners supplier should have them. But if that doesn't work, ISO M5 is almost exactly the same and might be close enough to fit. -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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10base5 (Thick) Terminator ?

by pete＠dunnington.u-net.com

On Mar 31 2005, 18:30, Tom Peters wrote: > This is classic frozen yellow garden hose- typical yellow jacket. So not > teflon, probably. I suppose if I inspect it closely I might find the old > classifications: CMP for plenum, CMR for riser, CM for neither, right? Could be, but since we don't rate things the same way over here, Idon't actually know. Sorry! -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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Xerox 820-II

by aserlanger＠earthlink.net

Looking around desperately for cp/m disks for the Xerox 820-II. If anyone has these to share or for sale I'd be very grateful. Thanks, Andy Erlanger

21 years, 2 months

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10base5 (Thick) Terminator ?

by birs23＠zeelandnet.nl

This is probably gonna be a really easy question for you guys; is this http://www.mansier.net/10base5terminator.jpg a 10base5 (thick ethernet) terminator ? Thanks! Stefan. ------------------------------------------------------- http://www.mansier.net

21 years, 2 months

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Looking for MS Money version 3

by CCTalk＠catcorner.org

Copy right is 1996, so it is almost on topic. Does anyone have an install disk for this? A very good friend of mine needs to move his data to a new computer this weekend and he can't find his install disk. What amazes me is that he's been running this since 1996 without losing data once. Thanks for any help, (let the scolding begin) Kelly

21 years, 2 months

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10base5 (Thick) Terminator ?

by pete＠dunnington.u-net.com

On Apr 1 2005, 0:11, Jochen Kunz wrote: > On Thu, 31 Mar 2005 14:38:07 -0600 > AFAIK thick Ethernet cable is more or less RG213. Typical values are 8 > dB / 100 m attenuation at 150 MHz and 15 dB / 100 m at 450 MHz and a > velocity factor of 0.66. Too slow. The velocity factor for thick Ethernet is supposed to be around 0.78. You can use RG213 or even RG8 but the maximum size of your network would be slightly shorter, to allow for slightly longer round-trip delays. > Ahh, and keep in mind that these cables usually are not UV resistent, so > sun light will destroy the outer jacket! Cover the cable if used > outside to avoid direct sun light. I believe you can (could) get plenum-rated cable that has a Teflon outer instead of PVC. Teflon is resistant to UV. -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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10base5 (Thick) Terminator ?

by James＠jdfogg.com

> Subject: 10base5 (Thick) Terminator ? > > This is probably gonna be a really easy question for you > guys; is this http://www.mansier.net/10base5terminator.jpg a > 10base5 (thick ethernet) terminator ? This is an "N" type connector. I thought 10base5 used PL259's (single unshielded pin in the center, screw shell).

21 years, 2 months

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10base5 (Thick) Terminator ?

by pete＠dunnington.u-net.com

On Mar 31 2005, 14:38, Tom Peters wrote: > It was (is-- I still have a spool of it!) 50 ohm coax with N connectors, > and paint marks at every meter boundary. You had to terminate each run of > thicknet end each end (that's two ends, for those who are counting). > > You had to tap it with a vampire tap ONLY ON THE 1 METER MARKS using a tap > drill tool that would core into the shield and expose the center conductor. Actually, every 2.5m, not every meter. > I'm still looking for specs on thicknet cable-- I know the characteristic > impedance is 50 ohms, but if I knew the velocity factor and losses at VHF > (144 - 148 mhz) and UHF (430 - 450 MHz) I could use the stuff for my > amateur radio hobby. As it is, it's gathering dust. It varies very slightly from maker to maker and even batch to batch, so if it's that critical you'll need to measure it. Indirectly, the 802.3 standard says 0.78; my tables show Belden 9880 VF is 0.78-0.82, attn 1.3dB/ft @ 100MHz, 2.8dB/ft @ 400Mz, 4.5dB/ft @ 1GHz. Sometimes people use RG-8, though, which has VF 0.66, and higher losses. Surely 144-148 millihertz is VLF, not VHF? -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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10base5 (Thick) Terminator ?

by pete＠dunnington.u-net.com

On Mar 31 2005, 12:01, David H. Barr wrote: > On Thu, 31 Mar 2005 19:47:04 +0200, Stefan <birs23 at zeelandnet.nl> wrote: > > This is probably gonna be a really easy question for you guys; is this > > http://www.mansier.net/10base5terminator.jpg a 10base5 (thick ethernet) > > terminator ? > > Err, wasn't thicknet (DIX) the one with DB-15 / AUI transcievers, > vampire clamps, and so forth? To be picky, DIX != thick Ethernet, or more exactly DIX != 10base5. 10base5 uses thick coax but it works slightly differently to DIX. Yes, they use AUI cables and transceivers with a DA15 connector with that horrible slidelock, and they use vampire clamps on some of the taps (last time I fitted one was for a demo two weeks ago), but the "Ethernet" cable is the thick coax, with N connectors. > PS: That connector looks odd to me. My coax net has BNC T's on it and > a reflector on the end. Maybe we're not talking about the same > things? You mean a terminator. And the BNCs are thinnet, aka cheapernet, 10base2. Same speed as 10base5, but shorter (185m per segment instead of 500m), and with fewer allowed active connections per segment, and different rules about spacing the taps, which are BNC T-pieces. If Stefan's N connector has a 50-ohm resistor in it, it's a 10base5 terminator. -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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AS/400 P03 Questions

by phirkel＠sympatico.ca

Hi folks. I recently acquired an AS/400 P03 "Advanced Portable." This is my first real piece of IBM Midrange hardware, and I have not a clue how to interface with it. I know the OS is a PITA on its own to deal with, but I figure I'll solve one problem at a time. So, I was just wondering, does anybody have any manuals for this sucker (preferably in PDF form!) or know where I can grab them from? There is not a sign of the English manuals for this machine on IBM's website at all. Also, I was wondering if anybody knew how I would go about interfacing with this machine. The DE9 ports on the back of it are definitely not serial ports, and the only other port on it is a SCSI port. Am I missing some cards for this machine? It would almost appear as though the original owner pulled some interface cards for it, but I could be mistaken. Any help would be appreciated! Phil.

21 years, 2 months

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Century Data Systems T-50 disks

by pat＠computer-refuge.org

So, I picked up a bunch (5) of Century Data T-50s, (also labelled as "Diva" disk systems), which seem to be multi-platter 54.7MB removable 14" disk-pack drives. Of course, I didn't get any of the disk packs to go with them. My questions are: 1) Does anyone have any available disk packs, or know if they're interchangable with something else that is availble? 2) Does anyone want (some of) them? I don't want to give them up for nothing, but I'm not looking to get too much out of them, and I'd rather give them to someone who finds them useful than let them sit around, especially since I don't have any disk packs (yet). The drives are 150-200lbs each, and are rated at 4A at 208-240V (60Hz IIRC). There's a detailed manual on bitsavers about them: http://computer-refuge.org/bitsavers/centuryData/76205-902_tridentSpec_Nov8… I also have the T2000 disk excerciser and T2001 head alignment boxes for the drives. I have no idea if any of this works; it was probably in storage for 10+ years, and the drives date back to about 1980. Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

21 years, 2 months

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Popular Electronics Magazine

by swtpc6800＠comcast.net

For those of you that answered over 50 on the age question, you probably grew up reading Popular Electronics magazine. (For the U.S. folks anyway.) In the five year period between 1967 and 1971, Southwest Technical Products Corp. (SWTPC) published over 50 articles in Popular Electronics written by Daniel Meyer, Don Lancaster, Louis Garner and others. The idea was to write a construction article then sell the circuit board and kit of parts. Daniel E. Meyer started DEMCO in 1964 and incorporated as SWTPC in 1967. The company lasted until 1986 and had over 100 employees the 1970s. Don Lancaster was not an employee, he just got royalties. Around 1975 SWTPC came out with computer and terminal kits. Don Lancaster was turning out Cookbooks by then (RTL, TTL, CMOS, etc) and started doing musical projects for PAIA. They parted ways. I have been collecting old issues of Popular Electronics and Radio Electronics and scanning a selection of SWTPC projects. This is a history of kits like FM wireless microphones, reverb adapters, musical instruments, audio amps, strobe lights, digital clocks, and digital test equipment. Most of the members of this list have built several of these things over the years. For example, there are some Nixie tube projects in Feb 1970, Dec 1970 and Feb 1971. I have almost finished with Popular Electronics and have posted them to my web site. I will add to the Radio Electronics page next. (Thanks to Jay West for providing the space.) I am scanning the magazines at 300 dpi and storing them as tiff files. I downsize them to 150 dpi JPG files for the web. I have over 1.5 GB of magazine tiff files. I will make them available on a DVD ROM for those who want them. My whole web site will fit on a CD-ROM. I will provide details on how to get these in a few weeks. (I am not looking to make any money on this.) http://www.swtpc.com/mholley/magazines.htm I also have a 1971 SWTPC catalog with a list of which Popular Electronics issue each product came from. http://www.swtpc.com/mholley/Catalog7/Catalog.htm Michael Holley www.swtpc.com/mholley

21 years, 2 months

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Extender Board (5012447D)

by birs23＠zeelandnet.nl

Can anybody tell me what an Extender Board is ? It has part number 5012447D (with behind it also the text W9042). It also comes with two 70-11411-1D cables but I dont know if they belong with this. Thanks! Stefan. ------------------------------------------------------- http://www.mansier.net

21 years, 2 months

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TermiCette Model 3120 Magnetic Tape Unit

by marvin＠rain.org

Has anyone heard of this unit? I've done a Google search with no hits. In putting together my collection of documentation, I ran across this manual. Thanks!

21 years, 2 months

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10base5 (Thick) Terminator ?

by rimmer＠xs4all.nl

This is probably gonna be a really easy question for you guys; is this http://www.mansier.net/10base5terminator.jpg a 10base5 (thick ethernet) terminator ? Thanks! Stefan.

21 years, 2 months

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Obscure DOS question

by websupport＠degnanco.com

Is that true of an entire drive or just the directory? ><snip>You can't actually write more files than the >file structure supports if APPEND is all the extra help you've got. > How about some fancy DOS batch file programming and use of LHA (a small compression program) to unpack and re-pack files only when needed on the fly? bill

21 years, 2 months

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C64 and Vic-20 Stuff Available near Salem, Oregon

by d_l_mcd＠hotmail.com

My Dad is on a cleaning-out binge, and he is ready to landfill several boxes of C-64 and Vic-20 stuff. If anybody could make better use of it, please email me and I'll get you in touch with him. This is for you-pick-it-up-only, no shipping available. A small donation to him would be appreciated, but he really just wants to get rid of the stuff. He is between Dallas and Monmouth, Oregon. Salem is about 22 miles East >from there. Here is his description: --------------- Commodore stuff. Lots of it. Boxes of it. 64 and vic 20. stuff like: RUN commodore mags in late 80's; programmers reference guide; maybe a dozen games, Q-bert e.g.; COMREX CR 220 dot matrix printer (in box) Some commodores are in origional boxes. power supplies, game controllers. --------------- email me at: danmNO at soverSPAM.net or d_l_mcd at hotmail.com There's also a Friden electro-mechanical calculator and a bunch of other stuff. It's all going to the landfill soon if nobody goes to get it. Happy Spring Cleaning, Dan McDonald Bellows Falls, Vermont USA

21 years, 2 months

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origins of "kludge"

by bv＠norbionics.com

-- Bj?rn

21 years, 2 months

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GE Terminet cassette drive

by stanb＠dial.pipex.com

Hi, On UK eBay atm there's a cassette drive for a GE Terminet. We used Terminets in our place, but I don't recall ever seeing a cassette drive, anyone know anything about them? If it's stays cheap I might put in a bid just for the interest, and mebbe I'll find a Terminet one day... http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1479&item=57641615… -- Cheers, Stan Barr stanb at dial.pipex.com The future was never like this!

21 years, 2 months

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origins of "kludge"

by pete＠dunnington.u-net.com

On Mar 30 2005, 14:36, Jules Richardson wrote: > Back on topic, does the correct pronunciation of kludge contain the 'd', > or is it silent? 98% of people here in the UK seem to pronounce the d, > but I've heard a few who don't. Mind you, 'bodge' is an equivalent and > more commonly heard over here than kludge. "Bodge" doesn't mean the same thing at all. You're probably thinking of "botch", which means (v) to screw something up, or (n) something which is screwed up. "Kludge" means to make something work, but in an inelegant or clumsy fashion. "Bodge", however, means to adjust or adapt something carefully to fit, perhaps in a way not originally intended; "bodgers" were originally people who did the final fitting of parts to machines and the like. -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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origins of "kludge"

by wayne.smith＠charter.net

> Date: Wed, 30 Mar 2005 16:23:12 +1200 > From: "Mike van Bokhoven" <mike at ambientdesign.com> > Subject: Re: origins of "kludge" > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <00af01c534e0$2ff3e980$3d00a8c0 at falco> > Content-Type: text/plain; charset="iso-8859-1" > > > On Tue, 29 Mar 2005, Jim Isbell, W5JAI wrote: > > > The French word for "bell" is "cloche" which is pronounced not > > > un-similarly to kludge. Thus, this word was bastardized by the > > > Americans and an unwieldy arrangement came to be known as > a cloche or > > > later as a Kludge. > > Interesting. I'd always assumed it was a corruption of some form > > of the German word 'kluge' (clever). > > Me too. And I've seen a few etymologies/timelines that agree > with that, the > 'cloche' thing sounds a little far-fetched. But you never know... > > Here's a good summary of fairly official sources on this one: > > http://dictionary.reference.com/search?q=kludge > > > M. That's probably correct. In the 1990s I retained Cal. Berkeley math wiz Elwyn Berlekamp as an expert on Reed-Solomon coding and he told me that "kludge" was a rough contraction of "collossal" and "huge".

21 years, 2 months

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Beautiful DECmate on eBay

by waisun.chia＠gmail.com

This is a beautiful specimen. On a pinetop worktable with FOUR RX01/02 floppies!! Starting at $200..someone please save this!! http://tinyurl.com/6p9mp /wai-sun

21 years, 2 months

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PDP8/L Paper tapes online

by hachti＠hachti.de

Hello, PDP8-enthusiasts! I recently got a very complete looking set of paper tapes for the PDP8/L. All tapes are read in and ready for download on http://pdp8.hachti.de . Feel free to copy and/or mirror the files. I would be glad to see my tape images on bitsavers etc. Good night, Philipp :-)

21 years, 2 months

4
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Popular Electronics Magazine

by bpettit＠ix.netcom.com

Michael, I think you are providing a great service. And your web site is an excellent example for all of us trying to save a little history of computers. Thank you. Count me in as one willing to buy any CD or DVD you produce. Do you have the issue that reviewed the PAIA 8700? I don't remember if it was RE or PE. But I do remember buying the computer from the reviewer. Then visiting the designer and finding he had also designed a EPROM burner and monitor to go with it. Don't know if it was ever released. The pace was so fast in those days that single boards machines were outpaced by the many systems. Billy

21 years, 2 months

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origins of "kludge"

by tim＠tim-mann.org

> I know this could be the start of YET ANOTHER thread "Oh I think > it's older than that..." but to avoid that, let's raise the > standard from opinion/hearsay to printed word. > > From _ENCYCLOPEDIA OF COMPUTER SCIENCE_(Van Nostrand), 1976: > > KLUDGE > > The word "kludge" is a term coined by Jackson Granholm in an > article "How to design a kludge" in _DATAMATION_ (February 1962). Yep, it's way older than that. According to the Jargon File (which has also appeared in print in various editions, and which I'd trust a lot more than some random Van Nostrand "encyclopedia"), the above would be a reasonable statement if you replace "coined" by "popularized": kluge ... The variant 'kludge' was apparently popularized by the Datamation article mentioned under kludge; it was titled How to Design a Kludge (February 1962, pp. 30, 31). ... For all the details, see http://www.catb.org/~esr/jargon/html/K/kluge.html http://www.catb.org/~esr/jargon/html/K/kludge.html -- Tim Mann tim at tim-mann.org http://tim-mann.org/

21 years, 2 months

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Vacuum Tubes

by bmachacek＠pcisys.net

Just thought I'd let the listees know that while visiting my local parts and equipment store today (which carries a large amount of discontinued and surplus items of all types), I noticed there was a whole aisle of electronic vacuum tubes there. Guess it's been there for quite a while, I just hadn't noticed it before. I looked at several of the tubes and saw that the addresses listed on the boxes contained no ZIP codes, so I figure that a good part if not all of these tubes are vintage items from back in the '50s or '60s. I have no idea what prices they have on these items as most of the stuff is unmarked, but I know from buying other items there, their prices are usually pretty reasonable. If anyone has any needs of vintage vacuum tubes, contact me off list and I be glad to check on them for you. I saw RCA, GE, and Sylvania there to mention a few and I believe most were for TVs and Radios, but who knows what else I may find there. I'm not an electronics person so I don't know what distinguishes one tube type from another. Let me know if I can be of help to anyone out there. Bill bmachacek at pcisys.net

21 years, 2 months

6
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origins of "kludge"

by pete＠dunnington.u-net.com

On Mar 30 2005, 16:27, Chad Fernandez wrote: > From watching JunkYard Wars, or Scrap Heap Challenge as it is called in > the UK, I thought Bodge was about the same as kludge, too. Meanings tend to evolve with common usage. Just as "kludge" is becoming less derogatory in some circles, so "bodge" becomes more so, especially as with "precision engineering", the art of the bodger (in the sense of someone employed as such) disappears. "Botch" still means something that fails to work, "bodge" works, "kludge" works, but is ugly. -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

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HP Lamps

by birs23＠zeelandnet.nl

Hi, I just found two small lamps in a HP packaging and was wondering if someone knew for which system these are ? Part number is 2140-0203 and the text on it says LAMP, INCAND. 5V Written with a marker on the packag is STICKER LAMP and LOAD POINT Anyone any idea's ? It came with a bunch of HP1000 items. Stefan. ------------------------------------------------------- http://www.mansier.net

21 years, 2 months

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one more time... Facit software?

by jwest＠classiccmp.org

I'm looking for DOS (or dare I say unix) based software to control my facit N4000 punch. Yes, I can do it all via the front panel, but I'd like to find a copy of wncedit or something - as I understand it that software will start the punch, read in the binary and store it in a file, then burp the file back out to the device at a later time to recreate the tape. If anyone has such software I'd appreciate contact off-list. Otherwise, I'm gonna start writing something. Jay West

21 years, 2 months

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Xerox 820-II

by melamy＠earthlink.net

you can buy "brand new" copies of CP/M for the 820 from California Digital. The last time I checked they had gotten rid of most everything except CP/M and a few other things. http://www.cadigital.com/software.htm what their website doesn't mention is that it was for the Xerox 820 and it is 5 1/4" format. I don't know about compatibility between individual Xerox machines though. best regards, Steve Thatcher -----Original Message----- From: Andy Erlanger <andy at erlangerresearch.com> Sent: Mar 27, 2005 2:24 PM To: cctech at classiccmp.org Subject: Xerox 820-II (Previously posted in html, my apologies). I'm going to be bidding on a system with 5.25" drives, so I guess that's what I'd need, even though I think the 8" drives are cooler. Thanks, Andy

21 years, 2 months

3
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Universal floppy disk controller

by dwight.elvey＠amd.com

Hi The external boxes that have tape drives would have to have a FDC in them. These tape drives were designed to be paralleled with the wires to a floppy. I'd suspect that the older ones may have the right kind of controller but may have a clock speed issue. Dwight >From: "Jules Richardson" <julesrichardsonuk at yahoo.co.uk> > >On Wed, 2005-03-30 at 12:42 -0500, Barry Watzman wrote: >> This might be the answer to being able to access 5.25" drives on a "modern" >> PC. > >Semi-related, but I took one of their backpack CDROM interfaces apart a >few years ago - it was all totally custom ICs inside, plus I know >Microsolutions wouldn't publish any details on the control protocol. I >expect you'll find the same thing with the floppy drive version. > >> It would be really cool if 22Disk would work with a drive connected to >> this thing. > >I *expect* it's a pretty standard FDC chip and a bit of buffer / control >parallel-port interface circuitry implemented on a custom chip - I doubt >they'd go to the trouble of buffering raw tracks etc. and using the >associated memory to do that. Which means you're probably limited to the >same MFM formats that a normal PC FDC is capable of, and nothing more. > >Linux *might* support the backpack floppy drive; I can't remember... > >cheers > >Jules > >

21 years, 2 months

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Pinout/Replacement for Floppy Drive on HP 9133

by bernd＠kopriva.de

Hi, i have a HP 9133 floppy/hard drive unit where the floppy disk drive doesn't operate anymore (it returns read errors only) ... ... my first idea was to use a replacement drive from a 9122C/D unit, but those, that i own, have another pinout; the 9122 have only one 34 ? pin connector whereas the 9133 floppy has two connectors, one standard power supply and another one having 26 pins. Are those somehow interchangeable ? Thanks Bernd

21 years, 2 months

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Needed: HiRes scans of an Altair 8800b front panel

by billdeg＠degnanco.com

Here are some digital pictures of my 8800b, they are not perfect, but I hope they will do. The camera lens creates a slight fish-eye effect unfortunately. http://www.vintagecomputer.net/altair8800b/pic1.jpg (taken by earlier owner) http://www.vintagecomputer.net/altair8800b/hi-res_front1.gif http://www.vintagecomputer.net/altair8800b/hi-res_front.jpg http://www.vintagecomputer.net/altair8800b/hi_res_front2.jpg http://www.vintagecomputer.net/altair8800b/hi-res_front_withdrive.gif Bill

21 years, 2 months

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Universal floppy disk controller

by Watzman＠neo.rr.com

Ok, so we've been discussing various ideas for a universal floppy disk controller. I bought (E-Bay) a used Microsolutions "Backpack" external parallel port floppy disk drive, it's a 3.5" 1.44MB drive. Internally, it is a standard drive (with a 34-pin standard interface) and a floppy to parallel port interface card. The question is -- and it's really a software question -- If I connect a 5.25" drive to the interface (using the standard 34-pin interface) will the device (or, perhaps more to the point, will it's drivers) work? I believe that they actually made a 5.25" model (with a 1.2 meg drive), but I have not been able to find one. The Format program that comes in the software packet has documentation suggesting that it can format a 1.2 meg and even a 360k drive, and I'm guessing that the interface card is the same for the 5.25" and 3.5" models. This might be the answer to being able to access 5.25" drives on a "modern" PC. It would be really cool if 22Disk would work with a drive connected to this thing. I plan to do some testing in the next week or so. It still doesn't solve the eight-inch problem, however. [I know, there's a chance that the controller could be made to work with 8" drives using a funky cable -- but first things first, 5.25" drives.]

21 years, 2 months

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using a DRV11 to run an IDE drive?

by GOOI＠oce.nl

Yes, it is possible to connect a DRV11 to an IDE disk drive. However, you must compromise. I connected a IDE disk drive to some simple parallel ports of the I/O Board. But it is PIO mode only, no DMA, so not really fast but it works. The lowest level software is fairly easy. Check www.pdp-11.nl and click on the link "Home-brew PDP-8". You can download the 6809 source code which even resembles (a little) PDP-11 mnemonics. I thought to get it working with 8 bits, but it is a lot easier if you have a 16-bit data path. That means 16 inport bits and 16 outport bits. Further you need a few (6?) extra output lines for control. So perhaps one DRV11 is just not sufficient, but I would say: yes, you can connect an IDE drive to one (or two) DRV11's. BTW, if an IDE hard disk works, I found out that a Compact Flash Card with IDE adapter works just fine too. Solid state disk on your PDP-11! - Henk, PA8PDP. -----Original Message----- From: cctalk-bounces at classiccmp.org To: General Discussion: On-Topic and Off-Topic Posts Sent: 30-3-2005 20:18 Subject: using a DRV11 to run an IDE drive? I've seen an old PC trick that uses the printer port and custom cable to bit-bash interface an IDE hard drive or cdrom using a dos .sys driver. Anyone think it's possible to do the same with a DRV-11 for the pdp11? Features: built in BAR/WCR/CSR circuits, 16 bits in, 16 out. 6 function bits, Attention/Ready/Cycle Request/Bust handshake bits etc Perhaps a small pld or fpga could use the spare handshake or function bits to latch the 3 address bits for the IDE and generate the chip select/read-write etc while the 16 bit input and output busses could be joined via tri-state buffers... I'ts not a replacement for a scsi controller, but it beats hunting down the hard to find bus interface chips and provides a proven already working basic interface. I've got a dozen of the QBUS (and a few UNIBUS) DRx11 boards if someone is interested in fooling with the idea. As a side note - I recall UW's CCNG CE dept fashioned an early MP cluster called using DRV11s to connect LSI11-2s in the 80's. regards -h

21 years, 2 months

1
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Commodore 128 Easter Egg

by billdeg＠degnanco.com

I believe you mean: SYS 32800,123,45,6 The text is (note the "herdware" is intentional): Brought to you by... Software: Fred Bowen Terry Ryan Von Ertwine Herdware: Bil Herd Dave Haynie Frank Palaia Link arms, don't make them. I took a quick picture and posted it ... http://vintagecomputer.net/commodore/128/easter_egg.jpg -Bill > > Does anybody have a Commodore 128 or a VICE emulator to try this ? > > > > 1. Boot machine > > 2. Type: SYS 32400,123,45,6 > > 3. A list of system programmers is displayed

21 years, 2 months

1
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program to print out ASCII renderings of punch cards and/or papertape?

by pete＠dunnington.u-net.com

On Mar 30 2005, 5:26, Ethan Dicks wrote: > I've been wracking my brains and googling for most of an hour... ISTR > there _used_ to be a program that shipped with UNIX (at least > BSD-flavors, if nothing else) that could take a string as a command > line arg, and print either a punch card image or papertape renderings > to stdout. > > Does anyone remember the _name_ of this program? ppt(6) for paper tape form, bcd(6) for punch cards. In Seventh Edition, BSD, SunOS 4, and some Linux distros. I think I have the Seventh Edition source here somewhere if you want it :-) -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

1
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formatting an RD54 with on a pdp11/73

by pete＠dunnington.u-net.com

On Mar 29 2005, 16:32, Eric Josephson wrote: > On Wed, 30 Mar 2005, Pete Turnbull wrote: > > > I've never run ZRQC (or indeed most XXDPv2 diagnostics) the way you're > > doing it. Are you sure that works? > > I used the same method to format an rd54 a few weeks ago. > It worked fine for me. > > Thanks to Jonathan Engdahl for providing the details at: > http://users.safeaccess.com/engdahl/xxdp.htm Yes, I remembered Jonathan's page just about the moment I hit "send" :-) -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

1
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Sun 4/330 with faulty serial interface...

by julesrichardsonuk＠yahoo.co.uk

We've got a Sun 4/330 which has bit 6 stuck high in every character output on the console. I don't suppose anyone has schematics for these boards or know how the serial hardware works, do they? The machine looks to be booting OK, so it appears address & data buses are fine - but at the point where characters must be loaded into a parallel register and converted to serial for output it's falling over... I suspect the machine's hard-wired to use only serial port A as console, but either way I couldn't get hold of the right cable to see if the other three serial ports are OK (the latter three being 9-pin male, whilst port A is 25 pin male) I can't think of any line settings, faulty voltage rails etc. that'd cause bit 6 to be stuck high, so I'm assuming it's a hardware fault... cheers Jules

21 years, 2 months

5
12
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origins of "kludge"

by bpettit＠ix.netcom.com

> From _ENCYCLOPEDIA OF COMPUTER SCIENCE_(Van Nostrand), 1976: > > KLUDGE > > The word "kludge" is a term coined by Jackson Granholm in an > article "How to design a kludge" in _DATAMATION_ (February 1962). > The definition is given as "an ill-sorted collection of poorly > matched parts, forming a distressing whole". The design of every > computer contains some anomalies that prove to be annoying to the > users and wghich the designer wishes he had done differently. If > there are enough of these, the machine is called a "kludge". > > By extention, the term has come to be applied to programs, > documentation, and even computer centers, so that the definition > is not "an ill-conceiverd and hence unreliable system that has > accumulated through patchwork, expediancy, and poor planning". As others have mentioned, the origin much older. There was a long thread on this someplace, maybe in Datamation, about the origin. It was certainly in use before WWII by maintainers of the punched card devices. It showed up in writing in a few articles during the '50's. > The first kludge article triggered five others ("How to maintain a > kludge", etc) in subsequent issues of _DATAMATION_. Four of the > articles may be found in the book _FAITH, HOPE AND PARITY_ edited > by Josh Moshman, Thompson Book Company, 1966. > > -- F. Gruenberger I shall certainly try to find the book. I loved those articles. Read all of them when they came out. I still have two of them that I tore out of Datamation. Scans of them would be perfect for the readers of this list. I especially remember "How To Maintain A Kludge" subtitled "Craftily!" Paraphrasing, they had a hall of fame maintenance engineer who talked a customer into using a Kludge Komputer for 6 months even though it had a broken power on switch. Billy

21 years, 2 months

2
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RTP IO controllers (Computer Products, Fort Lauderdale)

by hofmanwb＠worldonline.nl

RTP makes very reliable IO equipment for use in plants and laboratories. The Universal controller can be connected to a wide variety of computers using a module that plugs into the bus of the computer. One can also use an ethernet module or a module with a serial line (DIOC) I did a number of projects where I used DIOCs to couple it with PDP-11 computers, a Foxboro SMS computer and a GE Mark V. The great advantage being that when you change the type of computer you use, the plant wiring can be left unchanged. The great reliability of the RTP stuff ment that even when the computer is worn out, you can leave the RTP in place. Factory experience was that maintenance people completely forgot the RTP gear because it practically never stopped working and bewilderment set in when it once in a while failed. Very convenient is also that after 10 or more years it was perfectly possible to get spare parts. RTP is not for planned obsolescence I would not be surprised at all if spare parts still could be obtained for your stuff. Philipp Hachtmann wrote: > Hello, > > I am looking for information about IO controllers made by "Computer > Products Inc., Fort Lauderdale". > > The controllers are normally named "RTP XXXX/XX" where X are numbers. > The company who produced these controllers (now RTP corp. > www.rtpcorp.com) is still around and uses its "RTP BUS". But they don't > give me any information about the bus. > > Who has this kind of hardware in one of his old minicomputers (exept Tom > Jennings who will send me over his controller)? > Who has ANY documentation for these controllers? > Who knows someone who could have... etc. > > Pictures of my controllers can be found here: > > http://h316.hachti.de/img/rtp1.jpg - My two devices > http://h316.hachti.de/img/rtp2.jpg - A label > http://h316.hachti.de/img/rtp3.jpg - first device's cards > http://h316.hachti.de/img/rtp4.jpg - second device's cards > > Thank you very much, > > Philipp :-) > >

21 years, 2 months

3
2
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formatting an RD54 with on a pdp11/73

by pete＠dunnington.u-net.com

On Mar 29 2005, 15:47, Heinz Wolter wrote: > M8190, 2 megs ram, rqdx3 controller.. > booted Jonathon E.'s modified vtserver to run boot.dd and > the ZRQCH0.BIN dumped in E11 from xxdp25.rl02 pathed for boot.dd.. > then tried to format a proper (sadly prev. PC formatted) RD54 > on an M9058 distrib. card (one drive, DS set to DS3, and terminated) > (I've also got all 4WP/drive ready switches/leds attached but none show > activity on bootup.. so it looks like ZRQCH0 never even talks > to the RD54) > > ZRQC SYS FTL ERR 00006 ON UNIT 00 TST 001 SUB 000 PC: 105742 > Fatal Controller Error During Initialization. > > ZRQC SYS FTL ERR 00006 ON UNIT 00 TST 001 SUB 002 PC: 105742 > Fatal Controller Error During Initialization. > > ZRQC EOP 1 > 2 TOTAL ERRS > > Anyone know what these error messages below mean? Am I using > the wrong image for an RQDX3 - maybe ZRQCH0.BIN wants an RQDX2? No, ZRQC is specifically for an RQDX3, and H0 is the proper version for an RD54. It wouldn't work with an RQDX2 (you need ZRQBCx for that). Have you got the correct ROMs in the RQDX3? Correct jumper settings (standard address set on W1-W11, W12-W17 not fitted, W23 should have jumpers between 1-2 and 3-4 for most firmware versions)? Which connectors do you have the drive connected to (should be J1 and J5)? Do you have the terminator resistor pack on the drive itself? "Fatal Controller Error" sounds like the controller isn't doing what the diagnostic expects. Does the RQDX3 pass the self-test? It has a small LED on it; that should go out about 3 seconds after power-up if it passes the selftest. If it doesn't, disconnect the drive and try the power-up selftest again. I've never run ZRQC (or indeed most XXDPv2 diagnostics) the way you're doing it. Are you sure that works? -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

2
1
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formatting an RD54 with on a pdp11/73

by pete＠dunnington.u-net.com

On Mar 29 2005, 15:47, Heinz Wolter wrote: > M8190, 2 megs ram, rqdx3 controller.. > booted Jonathon E.'s modified vtserver to run boot.dd and > the ZRQCH0.BIN dumped in E11 from xxdp25.rl02 pathed for boot.dd.. > then tried to format a proper (sadly prev. PC formatted) RD54 > on an M9058 distrib. card (one drive, DS set to DS3, and terminated) One more thought... some of the manuals say to set the drive to DS3. With an M9058 it shouldn't matter; the drive selects are all tied together on each of J1, J2, J3, J4, each of which is fed by a separate drive select from J12 (the 50-way connection to the RQDX3). For example, J1-26 is fed from J12-30, which is DrvSel.3. Except that there's a removable link for each connector, between DS0 (pin 26) and DS1/2/3 (pins 28/30/32 - DS1/2/3 are hardwired together); make sure that link hasn't been removed. -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

1
0
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Obscure DOS question

by websupport＠degnanco.com

Have you tried using the append command? You can put ~512 files in the root and then the rest in directories, but the OS will treat all files within the append "path" as being from the same place. By using the append command, you can tell the OS to look in the other directories without having to declare the directories in your code. It sounds like each file name is unique so it should work (?) append a:;a:\1;a:\2 -Bill > >MS-DOS 3.3 has a limit of 512 entries in the root directory. I have a >need to put more than this. > >Was there ever a way to put more than 512 files in the root directory? >Some sort of patch or utility? > >Did previous or subsequent versions of MS-DOS allow more entries in the >root? > >Another question: > >When using the SUBST command in MS-DOS, you cannot aparently substitute >the C: drive. I seem to recall that MS-DOS 6.0 allowed this, although I >might be confusing that with the ability of LANtastic to redirect the C: >drive to a network drive. > >At any rate, what I'm trying to do is overcome the limit of 512 file >entries in an MS-DOS 3.3 root directory. > >Does anyone know how to accomplish this? > -- E N D --

21 years, 2 months

2
1
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one more time... Facit software?

by pete＠dunnington.u-net.com

On Mar 29 2005, 14:29, David Holland wrote: > I've had pretty good luck hexediting w/ khexedit (part of KDE). It > does have a insert/delete mode. > > Albeit that involves Linux/KDE, and is fairly fat. > On Mon, 2005-03-28 at 18:04 -0800, Eric Smith wrote: > > Jay wrote: > > > Was just looking for something more high level, and perhaps something that > > > would read the data into a file, and let you edit it with something akin > > > to a hex editor, then punch back out, etc. > > > > I use Emacs Hexl-mode for that. I use "hexedit", one of the curses-based ones. Lightweight, extendable. On my SGI Indy/Irix 5.3, the binary is 25328 bytes. http://merd.sourceforge.net/pixel/hexedit.html http://merd.net/pixel/hexedit-1.2.10.src.tgz -- Pete Peter Turnbull Network Manager University of York

21 years, 2 months

1
0
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Birthday gifts for the computer collector

by James＠jdfogg.com

> I've heard that some prisoners develop an alternate world > with activities that keep them sane. > > Mike I do this now! Is this a bad thing?

21 years, 2 months

1
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