test-drb October 2001

test-drb@ccmp.vtda.org

259 participants
770 discussions

ArcNet and the Pursuit of Multiple Topologies

by dittman＠dittman.net

> > > IP over carrier pigeon!! > > > > UUCP over floppies ferried by cars! BLEEEAAAAAARGH!! > > > > Peace... Sridhar > > Unless I'm mistaken Dave is talking about a transmittion method that's > actually been used. There is actually an RFC for it. Haven't carrier pigeons been extinct long before IP and UUCP were developed? -- Eric Dittman dittman(a)dittman.net Check out the DEC Enthusiasts Club at http://www.dittman.net/

24 years

ArcNet and the Pursuit of Multiple Topologies

by mcguire＠neurotica.com

On October 9, Sellam Ismail wrote: > > 4) Any other interesting topologies I should try? I have plans to > > do: Arcnet, FDDI, Token ring, Localtalk, 10b2, 10b5, 10bT, 10bTX, > > 10bFiber, and (eventually) 802.11b wireless. > > String and tin cans? IP over carrier pigeon!! -Dave -- Dave McGuire Laurel, MD

24 years

Looking for : IBM 5110 Serial IO adapter software

by mythtech＠Mac.com

>We have an IBM 5110 with a serial adapter and have recently verified >that the tape drive is operational. We are, however, missing the >software cartridge for the serial adapter. > >Does anyone have a copy who would be willing to make a copy? We can >supply a blank cartridge and pay shipping costs. I have a 5110 tucked away in a corner (I was actually just thinking about it yesterday). I don't know if I have the tape you are looking for, but if you tell me what I should look for, I can check. Are the 5110's of any collector value (not that I would ever part with mine, but I am curious if it is just me that wants to keep it, or if it is actually a valued machine). Mine has this big dual 8" floppy drive box. I *THINK* it might also have a 5mb hard drive built into the floppy box, but I don't remember (the thing has been shut down and in storage for about 12 or 13 years... so it may not work anymore) -chris <http://www.mythtech.net>

24 years

H88 kit available

by donm＠cts.com

Sorry folks, it's gone, Emanuel Stiebler was first on the mark. - don

24 years

Phonemark/Entrepo Quick Data Drive

by acme_ent＠bellsouth.net

Philip Pemberton wrote: > A while ago I got a Phonemark "Quick Data Drive", aparrently made by > Entrepo. It uses small endless-loop tape cartridges called "Wafers" (any > relation to the Rotronics Wafadrive? hmm...). Sounds like this device uses the same "stringy floppy" tape as the A&J Microdrive and the Wafadrive. > I've had the cover off, and it appears to use a small-ish black plastic > mechanism with "BSR" printed on it. This mechanism looks (from the front) > exactly like the ones on the Rotronics Wafadrive. Anyone know if Wafadrive > cartridges will work with it? Anyone know where to get Wafadrive cartridges? Try comp.sys.sinclair. Be advised that Entrepo made two types -- A and B. Same tape, different housing. I have A&J drives (one each A and B type) hung off my TS2068. The drives are slow, and the tapes are extremely fragile, to the point that I rarely use the drives any more, in order not to destroy my few remaining tapes. Glen 0/0

24 years

Looking for Turtle Tot information

by jtinker＠coin.org

The Turtle Tot is a two-wheeled robot, that is about a foot in diameter. It communicates with a computer via RS-232. The supporting software was made by Harvard Associates. I think the actual robot was made by Flexible Solutions, a Tasmanian company. The one I have is missing several chips, and I am trying to find out what they are. If anyone has documentation on this device that includes the board layouts, I could use some help. Thanks, -- John Tinker

24 years

classiccmp-digest v1 #690

by jfmiller＠nc.rr.com

>> CESIL (Computer Education in Schools Instructional Language), >Ha ha, I'd forgotten about that one... I remember typing in a CESIL >interpreter into the Speccy from some magazine or other. It >was even slower than ZX BASIC though so I gave up on it after a couple of weeks.. I wrote that "interpreter". It was published in ZX Computing I think. I still have the magazine upstairs. The original program was written for my 'O'-level in Computer Studies. The magazine had already published Moon Rescue (a rip-off of Lunar Lander) that I wrote one weekend after Swap Shop had been cut short for some sporting event. Smelling the lure of money (15 quid was a lot for a 15-year old in 1981!), I thought I'd send of the ZX-CESIL after converting it from my ZX-81 to my Spectrum. I remember using the real ICL-CES CESIL at school - writing out the code on sheets of paper, sending them off to the local poly. We had a TTY link with an old-fashioned modem and a paper tape reader to boot. We were very jealous of one of the other schools that had a VDU monitor! Ah, yes. Those were the days. My friends and I used to talk about how great it would be to have a VDU with such hi-res graphics that you could do 1024 x 1024 in full 24-bit RGB. We calculated the cost of the RAM to hold one frame and it came to hundreds of thousands of pounds. Not in our life time, we thought. Hee-hee. BTW, I've seen my ZX-CESIL2 on a Russian Spectrum software repository site that you can download and run via a Z80 emulator. Pointless but fascinating! John.

24 years

Burroughs E6000

by plboland＠home.com

As late as 1977 ! was using two Burroughs E6000 computers to perform the function of loan payment application. The loans were for health club membership in the Chicago area and a great deal of the rest of the upper midwest area. We had over 50,000 loans outstanding at any time and processed from 1,000 to 3,000 loan payments a day. The machines we had were magnetic stripe ledger card readers and they would punch an output card with the results of the processing of the transaction. The latest information about the loan kept on a master deck of cards was replaced with the card that was punched as a result of the transaction on the E6000. The update was performed on a daily basis using the 085 sorter and a reproducer/collater. During the last 8 to 12 months of the use of the E6000, while a conversion was being worked on, we used only one E6000 and kept the other one for spare parts. Burroughs had run out of spare parts. The system worked, but it was manually work intensive, fraught with errors and created a great deal of work at the end of the month to balance the ledgers.

24 years

Looking for : IBM 5110 Serial IO adapter software

by mythtech＠Mac.com

>>>Are the 5110's of any collector value (not that I would ever part with >>>mine, but I am curious if it is just me that wants to keep it, or if it >>> >> >> The ones with APL seem to be harder to find than the ones with >> BASIC :( >> >> (I'm looking for a working APL model of 5100, 5110, or 5120 ... >> can trade BASIC model of 5110 or 5120) > > >Ours is an APL model - sorry not available. > >Surely the dual APL/Basic are even rarer? Know what... mine might be a dual! I remember using Basic on it, and there is a front switch to go between basic and something else. I would have said mine was basic only, but just friday, while cleaning out some old stuff, I came across the APL manuals for the 5110... so that would sure tell me mine is a dual (I only have the one, so the APL stuff didn't go it a different machine). And nope, mine isn't available either.... except maybe in trade for a new pickup truck... I am in desperate need for one of those. -chris <http://www.mythtech.net>

24 years

ArcNet and the Pursuit of Multiple Topologies

by pete＠dunnington.u-net.com

On Oct 13, 13:10, Eric J. Korpela wrote: > > 100baseTX uses the same pairs as 10baseT. > > > I thought that 100bTX uses 3 pairs for full duplex (at least my > wiring instructions say it uses 1+2 3+6 and 4+5.) Have I gotten some > misinformation? Yes, I'm afraid you have! 100baseTX uses the same pairs as 10baseT, no more, no less. 4+5 are definitely not used. However, they are used (along with 7+8) for 100baseT4, which uses a different encoding and modulation scheme to permit 100Mb/s operation over lower-grade cable, using all 4 pairs, and similarly 1000baseTX uses all four pairs. Nothing I know of (certainly no standard Ethernet technique) uses three pairs. In 100baseTX full-duplex (and 10baseT full-duplex which is an extension of the older standard, not always supported) the same pairs are used for transmit and receive as in half-duplex. The only difference is that both pairs are allowed to be active at the same time (which would be counted as a collision otherwise). -- Pete Peter Turnbull Network Manager University of York

24 years

Eric Smith asked me to post this

by mac＠Wireless.Com

Hi, Eric Smith, currently stuck in Colorado with a large truck full of classic stuff has asked me to post this. (He doesn't have net access.) He appreciates the outpourings of concern, and wishes to communicate that all appears to be under control now. The springs are being repaired on the truck and he should be able to finish the journey. Thanks everybody for your concern. -Mike (for Eric)

24 years

Research Machines Information

by Simon.Hardy＠hemel-hempstead.sema.slb.com

Chris, Thanks for the suggestion...But already looked at that, the keyboard is the old two metal contacts (2mm apart) on the board and a conductive surface under the key type.... No sign of spillage or delay in key returning to normal... I suspect a component fault, but have no idea where to look without a manual... Desperately seeking any 480z or 380z manuals or other information, online, original or photocopy. Rgds Simon -----Original Message----- From: Chris [mailto:mythtech@Mac.com] Sent: 11 October 2001 16:03 To: Classic Computer Subject: RE: Research Machines Information >the keyboard repeats (a bit like local >echo). If I press a key, I get two of the same character on the screen. One >appears when the key is pressed, and the other when it is released. I have seen this happen MANY MANY times with PC keyboards, so maybe my findings apply. In every instance that I have found it, it is beacuse someone spilled either soda or coffee into the keyboard, and the pads were sticking. The key would register when pressed, and then when released, the pad wouldn't pop up right away, instead it would "peel" up, and cause a 2nd (or sometimes a 3rd if it was sticky enough) registration. Opening the keyboard and washing with alcohol or contact cleaner has always fixed it for me. -chris <http://www.mythtech.net> ___________________________________________________________________________ This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of SchlumbergerSema. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please notify the SchlumbergerSema Helpdesk by telephone on +44 (0) 121 627 5600. ___________________________________________________________________________

24 years

Radio shack TRS-80 PC-1 and PC-2

by technos＠nerdland.org

Welp, have managed to reach the fellow who wrote the conversion utilities for these fine calculators.. And got a very nice pointer to pretty much all I would ever want to know about them. Now I get to start on a Linux kernel driver to make them appear as serial devices.. A couple hundred baud fake serial connect over /dev/dsp is looking mighty feasable.. I *WILL* IRC from one of these, goddamnit.. Jim

24 years

SCSI pros & cons

by acme_ent＠bellsouth.net

> > Who cares what the cause is? The point is that it won't work. > > This comment worries me a lot (mind you, it's typical of the mentality of > PC-goons, but I thought this list was mostly hackers)... > > Whenever something doesn't work, my first reaction is to fix it. And the > first stage in fixing a problem is to identify what that problem is (at > whatever level of detail is necessary to be able to decide on the right > repair). > > -tony I'm with you, Tony. From what Iggy wrote it appeared that he stuck a bunch of boards in a system, didn't get the results he expected, and just gave up. I simply do not understand this sort of thinking. Aren't we supposed to be the ones in control of the machines??? Glen 0/0

24 years

IDing WYSE terminal

by mythtech＠Mac.com

> There is WYSE emulation >software available, but at a cost. Do you know a product name? where can I get info? I can find a free wyse 50 emulator (well, sort of, there is one in an old version of ProComm+ that I have), but it doesn't seem to work with the system. Otherwise, is there someplace I can look up the spec for the protocol it uses... maybe write my own emulator. Is this public info, or would I have to buy the rights from Wyse? -chris <http://www.mythtech.net>

24 years

Philbrick?

by mranalog＠home.com

John Allain wrote: > While cleaning up some garage space (yes, so a Car could > go in there) I came across a cache of some things I knew I > had and one thing I forgot. > A 2 tube module.from George A. Philbrick Researches Inc. > It's a GAP/R K2-W with "computor" tubes in it. > > Before anybody vomits (as regards computor) could > somebody remind me who Philbrick was? > The name seems familliar. TIA 1946 George A. Philbrick Researches Inc. (GAP/R) founded by George Arthur Philbrick, electronic analog computer pioneer. The company produced many innovating electronic analog computer designs. During the 50's and early 60's they had the opamp market pretty much all sewn up. 1966 Merged into Teledyne Philbrick Nexus, Which became Teledyne Philbrick, Which became Teledyne Components, 1993 Became TelCom Semiconductor. The K2-W was the first commercially available opamp. Open loop gain of 15,000. Power requirements are 4.5 ma at +300VDC and -300 VDC, and .6 amp at 6.3 volts AC or DC (tube heaters). Input and output voltage range -50VDC to +50VDC. Input current is less than .1ua. Early ones had a case of brown bakelite, later ones had a grey plastic case. I can send you a data sheet. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

24 years

[possibly OT]: Citizen 120D+ interface connector and Acorn System questions

by philpem＠bigfoot.com

On Thu, 11 Oct 2001 23:06:34 +0100 (BST) ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: > > BTW, anyone got a schematic for the Acorn Teletext Video card for the Acorn > > System-series machines? > > Is this some kind of trick question? Yes, I have it, open in front of me. > Got most of the other System schematics as well... Would you mind scanning and uploading the Teletext Video Card schematics for me? Preferably in PNG or some other lossless format at +/-300DPI. Thanks. -- Phil. philpem(a)bigfoot.com http://www.philpem.f9.co.uk/

24 years

Phonemark/Entrepo Quick Data Drive

by philpem＠bigfoot.com

Hi, My old Citizen 120D+ is back from the dead (thanks to some 0.71mm tinned copper wire and a bit of fiddling with my soldering iron) and I've got another query. A while ago I got a Phonemark "Quick Data Drive", aparrently made by Entrepo. It uses small endless-loop tape cartridges called "Wafers" (any relation to the Rotronics Wafadrive? hmm...). Without the Master QOS Wafer or the blank wafer that were supposed to come with it. Anyone care to tell me where I can get these tapes? Also, without the QOS wafer, I can't get my VIC-20 to work with it. Anyone want to hook a QDD up to a PC and transfer QOS to a T64 (tape) file for me? I've had the cover off, and it appears to use a small-ish black plastic mechanism with "BSR" printed on it. This mechanism looks (from the front) exactly like the ones on the Rotronics Wafadrive. Anyone know if Wafadrive cartridges will work with it? Anyone know where to get Wafadrive cartridges? I _know_ this thing will work on a VIC-20, but without the QOS wafer or a blank wafer I'm stuck. Is the tape inside these carts normal C-30 "Computer Tape"? Anyone care to sacrifice one and take pictures and measurements? A 2D CAD drawing of the tape would be nice (I can get good-quality C60s relatively easily, I just need to know how the wafers are assembled). Thanks again. -- Phil. philpem(a)bigfoot.com http://www.philpem.f9.co.uk/

24 years

Moving in 12 days....

by technos＠nerdland.org

Unless you've got a stockpile of DEC and/or Atari you haven't shared, your number is safe with us. Jim On Friday, October 12, 2001 10:38 PM, Curt Vendel [SMTP:curt@atari-history.com] wrote: > Hi Sean, > > Wanted to update my information with you, I'm moving in my new house in 12 > days, here's my new info: > > Curt Vendel > 117 Duke Drive > Carmel, NY 10512 > (845)-225-9793 (voice) > (845)-225-9794 (Fax) > > > Curt

24 years

SCSI pros & cons

by acme_ent＠bellsouth.net

> Glen Goodwin skrev: > > >Hmm -- my personal experience is that, unless the machine is already > >junked-up with a random assortment of TV and radio tuner cards, video > >accelerators, SoundBlasters and DVD decoders, SCSI is easily added to a > >motherboard with onboard IDE ports. I've personally built a few dozen of > >them, using both IDE and PCI SCSI controllers. > > >What sorts of problems are you encountering? Iggy Drougge replied: > You're welcome to try to sort out our pile of SCSI cards which so far haven't > worked in our OpenBSD machine. One machine, or many? If you have a pile of cards, one machine, and none of the cards work in that specific box, I'd suggest that there may be a fault in the box, or another device in there which conflicts with your SCSI cards. > We don't use PCI cards, though (we sold that > one, since we wouldn't use the SCSI for anything else than tapestreamers and > so forth). Besides, SCSI integration into PC systems is really clumsy. Wow - these days the BIOS setup utility on the cards allows a lot of flexibility and also provides information about the installed SCSI devices, making it easy to verify IDs, etc. A few years ago I was building 80MHz 486 systems using Rancho Technologies RT1000 8-bit SCSI cards which I got for about $8 each. The cards were shipped labeled "not Win95 compatible," but, not only did they work with Win95, I never saw a faulty card, or a system in which the RT1000 wouldn't work. (Okay, so they were *slow*) So, my SCSI experiences have been good. > and they don't behave like the IDE hard drives. Well, that's the point, right? ;>) > They > have their own little BIOSes and things which I'm not used to from other > systems. Those little BIOSes (the ones with a setup program) are a *big* advantage. Just today I was cursing the fact that the BIOS on the ATA-66 controller I was installing didn't have a setup program. It took me two hours to get all six IDE drives working properly. With a decent SCSI card it would have been 15 minutes, tops (barring any bad drives or cables). > In fact, non-PC systems tend to see IDE as a kind of bastard SCSI > instead. They may be onto something there . . . Glen 0/0

24 years

Apple ][ disk controller state machine

by dhquebbeman＠theestopinalgroup.com

> Until I get my hands on a copy of the venerable "Beneath Apple Dos" > is there anyone who can point me to an online resource describing the > Apple ][ disk controller P6 ROM state machine? The exact uses > for the Q6 and Q7 switches ($C0EC-$C0EF)? Or would be willing to > summarize from the mighty tome for me? From: http://www.mac.linux-m68k.org/devel/iwm.php : ======================= : Accessing IWM Registers : ======================= : The IWM chip has several internal registers available to programs. : Access to these registers is controlled by the Q6 and Q7 switches. : : +=====+=====+=======================================+ : | Q6 | Q7 | Register | : +=====+=====+=======================================+ : | off | off | Read data register | : +-----+-----+---------------------------------------+ : | off | on | Read handshake register | : +-----+-----+---------------------------------------+ : | on | off | Read status register | : +-----+-----+---------------------------------------+ : | on | on | Write mode register (if drive is off) | : | | | data register (if drive is on) | : +-----+-----+---------------------------------------+ : : The mode register is a write-only register containing several flag bits : which control various features if the IWM. To access it, turn off the : drive (by accessing ENABLE), turn on Q6 and Q7, and write to any : odd-numbered address in the $C0E0...$C0EF range. hth, -dq

24 years

Levco Macintosh Transputer on Ebay

by rmeenaks＠olf.com

Hi, Here is a link to a Levco Macintosh Transputer board on ebay. http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1284357549 I am not connected to this listing, just passing on the information. I have some information on this board if anyone is interested, but I do not have any drivers for it. If anyone has them, I'll be happy to host them on my website.... Cheers, Ram -- ,,,, /'^'\ ( o o ) -oOOO--(_)--OOOo------------------------------------- | Ram Meenakshisundaram | | Senior Software Engineer | | OpenLink Financial Inc | | .oooO Phone: (516) 227-6600 x267 | | ( ) Oooo. Email: rmeenaks(a)olf.com | ---\ (----( )-------------------------------------- \_) ) / (_/

24 years

Sigma Designs OneReel Tape

by dhquebbeman＠theestopinalgroup.com

> >I'd like to hear more about this SCSI monitor - was it data over SCSI, or > >some kind of control thing, or what? > > It actually got all its data over SCSI. I suppose its main application was the > very oldest compact Macs which didn't even have any PDS slot. Forgot to mention... There were SCSI-interfaced Ethernet adapters for SCSI-equipped Macs... got one of those, too... -dq

24 years

Free unknown keyboard

by Innfogra＠aol.com

The keyboard is for Data General Terminals, I recognize it. I could possibly help IDing the terminal if anyone is interested. I have no interest but maybe some of the DG people on the list do. Paxton Astoria, OR

24 years

Free unknown keyboard

by mythtech＠Mac.com

Since I know people on this group like odd computer parts, I figured I would offer these here: I have 4 unknown keyboards available. They are tan and look like they might have come from some terminal system. They have a DB9 (DE9, ahh... D9) Male connector on it, and carry a part number 6246-A. No mention of who makes it, or what system they came from. I don't know if they work, I don't know anything about them at all. All 4 are rather dirty, and one of them is missing the key cap for what looks like two tildes and a backwards comma key. I recieved them as part of a ship test. (I work for a market research company, and one of the major shippers was doing a test with us, to see how the package made it thru shipping... so we recieved two shipments of 2 keyboards each... the shipper doesn't want them back) You can see a picture of one at <http://www.mythtech.net/keyboard.jpg>. I will hang onto them until monday, but after that, they are being dumpstered. If anyone wants them, they are up for grabs, they would be mailed out of 07450. A single keyboard weighs 6 lbs, figure add another pound for the box and bubble wrap to be safe. I can take PayPal to cover shipping costs, or they can be picked up in Ridgewood, NJ. -chris <http://www.mythtech.net>

24 years

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test-drb October 2001