test-drb

test-drb@ccmp.vtda.org

101090 discussions

by oldcomp＠cox.net

Thanks Eric, I'll take your word for it since I haven't looked at an Apple 1 schematic for about twenty-five years! That may have been another reason I didn't put video on my board! Bryan Eric Smith wrote: >Your Apple 1 homebrew page is interesting, but the details about >Woz's design aren't quite correct. The Apple 1 did use 4K multiplexed >address DRAMs (typ. MK4096) for the main memory. But the video memory >was entirely separate, and consisted of seven Signetics 2504 1Kbit >dynamic shift registers and a Signetics 2519 hex 40-bit shift register. >The video memory recirculated constantly, so it didn't need any explicit >refresh circuitry. > >It wasn't until the Apple 2 design that Woz shared the main memory with >the display to get automatic DRAM refresh. > >Best regards, >Eric Smith

23 years, 2 months

New goodie - Solid State Disk

by jplist＠kiwigeek.com

I received my EMC2 Orion SSD today... I have to say I'm impressed, it definately is what we'd considering "Enterprise" these days... The unit is, according to its manuals, 31.4" x 33.3" x 11.5", and weighs roughly 275lbs. The Orion has some nine slots in what looks like (but isn't) a full-size 3-connector VME bus cardcage. It has one "Director" (controller) card, and five 64MB memory cards installed (320MB). In the rear of the unit is one Maxtor 320MB SCSI disk, for offline backup, and two sealed lead-acid batteries (So that in an emergency power off situation the unit can back itself up to the internal SCSI disk and not lose data). Pictures are available: http://www.kiwigeek.com/hjp/comps/emc2_orion.html Now all I need is an IBM that can read from a IBM 3370/3380 DASD - which is what the Orion emulates... JP

23 years, 2 months

Century Data Systems (tape drive?) exerciser

by aek＠spies.com

I've put the manual for the T2000 up at www.spies.com/aek/pdf/centuryData

23 years, 2 months

cctalk digest, Vol 1 #473 - 49 msgs

by alhartman＠yahoo.com

> From: Mike <kenziem(a)sympatico.ca> > > So then why not demand that all countires with > weapons of mass destruction disarm? Because none of those countries attacked three of it's neighbors using them, were forcibly expelled from a neigboring country and agreed to disarm as part of the surrender agreement. We have not picked Iraq out a hat to disarm them. They asked to be disarmed when they used their weapons against their neighbors AND their own people (Northern Kurds). > Why not start with those that have actually used > them in the past. Name some... And I mean a country that has used WoMD in an offensive manner without provocation. > And not applied randomly. There are many other UN > sanctions that are being ignored or have been > vetoed. Not that are on the same level as the one Iraq is flouting. > He claims to have done just that and the arms > inspectors have not been able to find anything. > If the US has been concealing the evidence of this > then they are as guilty as he is. Did you not listen to the same presentation of Hans Blix that I did? He stated that not only did they find things, they found more things than Iraq reported. They found Iraq had developed weapons with a greater range, and in amounts in excess of the agreements. What is stunning for any intelligent person, is that he then followed that by saying he saw no problem with Iraq and that they were following the agreement. He basically said they WEREN'T in compliance, but that is was not a problem for him. > Because in most countries the police require proof > before an arrest and then there is a trial before > an execution. The police do not stop you on the > street demand proof of your innocence claim you are > lying and shoot you. There was such a thing, vis-a-vis Iraq. It was called the Invasion of Kuwait and the bombing of Israel with Scud missiles... What is happening now is of a piece with that. When we booted them out of Kuwait, they agreed to disarm as part of the surrender. They have not been keeping their word. They are in breach of their obligations, AND have been continuing to develop illegal weapons. Al

23 years, 2 months

Where has dbit gone?

by j.r.engdahl＠adelphia.net

I can't reach www.dbit.com, home of the Ersatz-11 (E11) PDP-11 emulator by John Wilson. Has this gone away? -- Jonathan Engdahl

23 years, 2 months

power (ups) systems

by Fred.van.Kempen＠microwalt.nl

Hah! Now *that* is on-topic banter! :) *saving info for later* Thanks! --f > -----Original Message----- > From: Christopher McNabb [mailto:cmcnabb@4mcnabb.net] > Sent: zondag 23 februari 2003 4:30 > To: cctalk(a)classiccmp.org > Subject: Re: power (ups) systems > > > On Sat, 2003-02-22 at 22:18, Fred N. van Kempen wrote: > > > My real question: > > > > These UPSes have 3 load segments each. On the Compaq, I currently > > use *2*. Is this the reason for its screaming? Does the total > > load come from the three segments? > > > > Fred, I'm betting the Compaq UPS is rated for 800VA per load segment. > If this is true, then that means you are trying to supply 1650VA from > two segments, which are rated for a total of 1600VA. Try > moving some of > the load to the third segment and see what happens. > > -- > Christopher L McNabb > Operating Systems Analyst Email: cmcnabb(a)4mcnabb.net > Virginia Tech ICBM: 37.1356N 80.4272N > GMRS: WPSR255 ARS: N2UX Grid Sq: EM97SD

23 years, 2 months

power (ups) systems

by Fred.van.Kempen＠microwalt.nl

All, While rewiring the VAX Lab here, I found something weird is going on with the power usage on the network. First, some stats: UPS 1: 2400VA, mains load 220VAC (Compaq) UPS 2: 2200VA, mains load 220VAC (APC) All power is 220VAC, 50Hz, single phase. Regular European power, so to speak. No weirdness there. The Compaq UPS is connected to the Compaq servers and related (MicroWalt Corp) equipment. This is the PROD network. The APC (new in town) is for the VAX stuff and related equipment, and powers all of that. For now, an 4100, a 3100 and some hub/ router/DECserver et al equipment. Here comes the fun part. All this *used* to be on the Compaq UPS, and it was fine, just at 96% of its load. Now that things are split out... the compaq screams even *more* at me, even though its reported load is ~1650VA. My real question: These UPSes have 3 load segments each. On the Compaq, I currently use *2*. Is this the reason for its screaming? Does the total load come from the three segments? Call me stupid, this I cant figure it out. I probably should not be doing this at 4am :) Cheers, Fred

23 years, 2 months

cctalk digest, Vol 1 #470 - 52 msgs

by alhartman＠yahoo.com

> No, I'm one of "those people" who sees no logic > whatsoever in going to war with Iraq. I don't want > to say that those in favor are stupid, but those in > favor are dumb. What's great about people like you Sellam, is that every time you think something like this, you get to have egg on your face when it turns out wonderful. I remember all the doom and gloom and naysayers, and the predictions of thousands of bodybags for the Afghanistan War on Terrorism a year and half ago. People thought that those in favor of that were dumb too... I am not someone who loves war. But, I am someone who believes in backing up rules, laws, and civilization with penalties when the rules are broken or in the case of Hussein, not only broken but flouted. It will be over fairly quickly once it starts, and as before (in 1981) it will be a rout. But, this time we will take Hussein out of power and set the people in Iraq free. Iran is probably next on the President's list, and then North Korea. Unless Kim Jong Il pushes to be the next in line and won't wait his turn. It's so wasteful for people like Hussein, Il and the leadership in Iran to do the kind of things that cause this, rather than dedicating themselves to providing the best possible lives and economy for their people. Since we still have people here in the U.S. who think ideaology is more important than doing the right thing, I'm not surprised there are similar people elsewhere... I hope the human race outgrows that someday... It's ok for you to think people in favor of taking Hussein out are stupid.... It only means you don't have a clue what it's all about... Hopefully getting egg on your face a few more times will make you tired of being wrong... Al

23 years, 2 months

Century Data Systems (tape drive?) exerciser

by aek＠spies.com

> It's marked T2000B Exerciser. It is for the T series disc drives (T40 -> T300) Not of much use unless you have one of these. Did you get the whole suitcase or just the T2000 ?

23 years, 2 months

New Find Today An AMSTRAD

by jrkeys＠concentric.net

My wife talked me into stopping at a thrift today and in the electrical area under some stuff I found a Amstrad PPC640. Not able to test it yet not enough "C" batteries. :-(

23 years, 2 months

cctalk digest, Vol 1 #470 - 52 msgs

by mail.list＠analog-and-digital-solutions.com

Hello Sridhar, > We shouldn't have tried to prevent it because it's none of our business. > I think Cuba is worse off with Castro, but it just simply isn't our place > to change that. That is for the people of Cuba to do. We were genuinely worried about Castro's wanting to have nukes only 90 miles offshore of the US mainland. Right or wrong, it was a real danger we wanted not to have happen. Best Regards At 01:38 AM 2/22/03 -0500, you wrote: >On Sat, 22 Feb 2003, Chad Fernandez wrote: > > > So your basically an isolationist, then? Sounds like many of the people > > here are. > >If by isolationist you mean that I believe we shouldn't be projecting our >collective penis into everyone else's affairs, then yes, I am an >isolationist. However, I don't believe that's the proper meaning of the >term. > > > I don't know much about many of items on your list, However. > > > > > 1961 : The U.S. attempts to overthrow the revolutionary Cuban > > > government at the Bay of Pigs. > > > > This ones interests me...... are you saying Cuba is better off, now that > > Castro is in power, and we shouldn't have tried to prevent that? > >We shouldn't have tried to prevent it because it's none of our business. >I think Cuba is worse off with Castro, but it just simply isn't our place >to change that. That is for the people of Cuba to do. > >Peace... Sridhar

23 years, 2 months

Hp-85 consumables source

by rhahm＠nycap.rr.com

Hello, Does anyone know of any web sources for thermal printer paper or new magnetic data tapes for the HP-85 other then eBay? Thanks, Bob

23 years, 2 months

CNN reveals real reason for Columbia crash

by cisin＠xenosoft.com

> http://www.decodesystems.com/cnn-columbia.jpg Wouldn't it be rather dangerous to fly at that speed in the atmosphere of a planet?

23 years, 2 months

Political Rants and Other BS

by jrice54＠charter.net

Can we please end the endless, mindless discussion and get back to 'puters. I'm getting really tired of all of the anti-this and anti-that BS. No wonder so many people have signed off this list. James -- http://webpages.charter.net/jrice54/classiccomp2.html

23 years, 2 months

TRS-80 Disk Drive

by alhartman＠yahoo.com

> HI: > > I am looking for a 5 1/4" floppy drive for a TRS-80. > The cable would be great too! Please let me know > the cost. Thank you. > > Sorry about my posting yesterday asking for a 1 > 1/4" drive. It was a typo. That's fine, but you still haven't provided the specific information about WHICH TRS-80 you needed a drive and cable for... That's like asking for a drive and cable for an Apple Computer... Please be more specific, and I'm sure there are lots of people on this list who could be of help to you. To repeast someone else's request: - What kind of TRS-80 is it? - Do you need an internal or external drive (i.e.: a Model III or IV can use both) - Do you need a case and power supply? - Do you need a 35 or 40 track drive? Or do you need an 80 Track Drive (mostly determined by the model, and the type of disks you want to read). If you can be more specific, those of us willing can be of more help.. Thanks! Al

23 years, 2 months

TELEX machine, modems

by gil＠vauxelectronics.com

Hi Bruce: When you say that the telex machines used a "high-voltage DC, 60mA current loop," is that implying a 120V loop as in standard TTYs? The reason I ask is that the "private-wire" current loop for an M32/33 is a max of something like 45 volts on the loop supply. I presume then, that the telex interface box was designed for the HV, 60-mil telex loop, and then in turn drove the internal 20-mil input to the selector-magnet-driver card of the M32. Was this telex interface box in the M32 stand? I had not heard of later M32s having Telex Line Adapters for FSK modem application. How can you identify which interface an M32 has? Was there a different dialer CCU, like the one with six pushbuttons used on the twx 33s? I have some additional telex info from other folks added below. ps: Bruce, did you see the post about all those TTY machines for free in Seattle? Lots of good stuff headed for the dump. gil ------------------------------------------------- More telex info from George Hutchison: Using a Teletype Corporation equipped telex machine on RTTY is relatively easy. You need a loop supply with a current limiting resistor (2K or so wirewound pot) a double-pole double-throw switch, and the telex machine. Connect the DPDT switch in the standard manner for reversing polarity. Feed the loop supply (Such as one would find in a 28 LESU) through the pot to the center terminals of the switch. Wire the reversing terminals of the switch to the telex machine input cable/terminals. If you plug the telex machine into 110 VAC, with the loop supply de-energized, it will run open. Some folks tweek the dial on the telex a bit to get the machine to lock up, but this is not necessary. Energize the loop supply. Depending upon the position of the DPDT Switch, the machine will either stop running open, remain on and be ready to type uponst, or will shutdown and the motor will stop. Flipping the switch will result in the opposite condition to occur. With the machine energized and the loop locked, set the loop current for 60 ma. When the machine is on and ready to type, it will key the loop that is coming from the loop supply. From there it is easy to use it to key another machine, a transmitter, or what have you. When the machine is in the off condition, motor shutdown, etc, depressing the "LOCAL" button on the telex will cause it to come to life so you can type locally. I have an ST-6 that I removed the 110VAC that goes through the motor control relay, and set it up with the reversing arrangement as described. Most ST-6 motor control relays were DPDT. The loop current from the ST-6 goes through the motor control/now reversing relay, so when the ST-6 says turn on the motor, the loop current flips polarity and turns on the telex machine. Such a deal. Thought some of you might like this bit of info. 73, George, W7KSJ ------------------------------------------------- More telex info from Don Robert House: I have always just used the loop rather than tapping into the SMD circuitry. I set a loop supply of 120-130 vdc to 62.5 milliamps with two machines wired in series into the loop. The machines usually have a mounting cord on them for this purpose. The M32, if it is a former Telex, it uses the ITA2 version of Baudot code. It is a 7.00 unit code with 1 start bit and 1 stop bit, which is 50 baud and 67 words per minute. ------------------------------------------------- More telex info from Jim Haynes: There are two Telex interfaces to the M32. One is neutral, and the other is a polar adapter that plugs into the neutral one. Look in the Western Union Technical Review CD ROM; I think it's all documented in there. And yes, it's 50 baud, 7.5 unit code. ------------------------------------------------- More telex info from Wayne LeTourneau: Most Telex's are 66 WPM, I have 60WPM gears in mine and I connect the local loop to terminals 8 & 9 in the rear. Local loop set at 60ma and not to exceed 100 VDC. It copies fine, I'M using a Flesher 170 tu. It also has automatic caridge return and automatic line feed, so can copy those RTTY stations that are using computers and don't have enough sense to send a LF and CR at the right time. I cannot get mine to talk to itself yet, have not figured out how to get the keyboard in series with the printer. Actually, the selector Magnets on thease draw close to 500ma, so you have to use the driver card, which is where terminals 8 & 9 end up. Wayne WB0CTE ------------------------------------------------- >From: "Bruce Lane" <kyrrin(a)bluefeathertech.com> > > Now I'm glad I spent those years with Western Union's Field Service division (when they still had one), fixing those things. > > The Model 32 Telex machine did not operate on a standard phone line. It required a dedicated hookup to a specially-equipped Western Union central office. The normal interface was high-voltage DC, 60mA current loop. In the case of longer-than-typical cable pair length, a polar adapter was employed to create a differential DC interface. > > The later Model 32's were equipped with TLA's (Telex Line Adapters) which used FSK, as you've already guessed. I don't recall the frequencies involved exactly, but 2200/2000Hz Mark/Space wants to stick in my head for some reason. > > The Telex network, as far as I know, is long dead in the United States, and some other of the more industrialized countries, replaced pretty much by the Internet and FAXes. The Telex-ready Model 32's ran at around 67WPM (Words per Minute)/50 baud. Amateur Radio RTTY standard calls for 60WPM/45.5 baud. > > In other words, you've got yourself a true museum piece there. You may be able to, if you wanted, convert it for ham radio use. However, you would need to change the motor gearing to bring the speed down a notch. Finding the necessary gear would be an adventure at best, though I can suggest a couple of possible sources if you want to try this. > > Enjoy! > >Bruce Lane, Owner & Head Hardware Heavy, >Blue Feather Technologies -- http://www.bluefeathertech.com >ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin(a)bluefeathertech.com ;----------------------------------------------------------- ; vaux electronics, inc. 480-354-5556 ; http://www.vauxelectronics.com (fax: 480-354-5558) ;-----------------------------------------------------------

23 years, 2 months

Subject: Re:large disk platters?

by cheri-post＠web.de

Wow ! Tony, could you send some photos of your disk drive ? I'd like to see this "mystical" thing ! :) The 24" platters of IBM's RAMAC are known to me but 36" platters ??? Who could have built such disk drives ? Any ideas of the company ? Pierre > > In about 1976 University of Missouri Bioengineering Program acquired an "IBM > > surplus image system" from somebody "unknown" out west. They sent a couple > > [...] > > > There were two clamshell halves that were opened to access the platter, each > > track had a fixed head over it. Stored on each track was the image on a > > single display station. By switching between tracks you could access > > different images. There was a vacuum pump to remove the air if you opened > > the clamshells to adjust the heads. Each of the display stations had an > > integrated keyboard and a proximity or optical pen to select menu items. > > One of the peripherals I have for my PDP11s is a PPL model 121 display > system. > > It uses a magnentic disk to store the video images. I think it rotates > once per field (the motor speed is electronically controlled with an eddy > current brake IIRC). Images are stored using analogue FM modulation on 3 > tracks of the disk (one for each of R, G, B). There are several sets of > fixed heads which can be selected so you can store several images on the > disk and display them. > > The disk is a lot smaller than the ones described here, though. I've not > taken the HDA apat (for obvious reasons), but it looks to be a normal 14" > platter. The HDA fits, disk horizontal, into a normal 19" rack module. > There's a separate PSU rack module, and a cardcage of electronics. It > connects to the Unibus via a DR11B interface I think. > > -tony ______________________________________________________________________________ Keine Lust, immer Ihre Adressdaten in eine E-Mail zu schreiben? Mit der vCard ist Schluss damit! Infos - http://freemail.web.de/features/?mc=021153

23 years, 2 months

VAX 11/750 question

by jwillis＠arielusa.com

I just received a new board set for my VAX 11/750, which includes an L0004 to replace the one I had before, which would send output to the console, but wouldn't read input from the console. Now, however, when I put in the new L0004, it prints garbage on the console. What's more, the _old_ L0004 doesn't print anything on the console anymore. Any ideas? TIA, John W.

23 years, 2 months

TELEX machine, modems

by grg2＠attbi.com

Hi, I have just bought a nice clean TELEX machine, it's a TTY-32, 5-level coding, with what looks like a phone line hookup, dial-type phone. I wonder if anybody knows what the modem standard is for this, and/or any phone number I could call to test this thingy out! Thanks, George

23 years, 2 months

Recent Find: Votrax PSS

by r.stek＠snet.net

Patrick - I dug out my Votrax manual (1982), and can give you the voltages: Pins 1-3, 26 VAC, 180 ma Pin 2, 20 VDC, 50 ma Pin 4 is 0 volt reference Unfortunately I don't have a PS for mine either. Be careful if you find a PS from the Votrax Type 'N Talk. It also has the 5 pin DIN, but it puts out: Pins 2-4, 19.8 VDC, .35A Pins 1-3, 17.0 VAC, 1.0A I do have a working TNT, and it is cool! Also, the DIP switch configuration on the PSS: (1 is up, 0 is down) 1-3 baud rate: 000 - 9600 100 - 4800 010 - 2400 110 - 1200 001 - 600 101 - 300 011 - 150 111 - 75 4 up - xon/xoff for serial port 4 down - rts 5 - unused 6 up - power-up message spoken 6 down - power-up message not spoken 7 up - parallel port used as input port 7 down - serial port used as input port 8 up - self-test - continuously performs diagnostic test - no access to PSS in this mode 8 down -normal operating condition Bob Stek Saver of Lost Sols

23 years, 2 months

(no subject)

by mail.list＠analog-and-digital-solutions.com

Hey, Here's one for the Military members, and taxpayers, of the list ... >from the "serial killer", "dick", "genital lice" that we are here in Virginia ... The Navy recently needed some Ariel Hydra Plus DSP boards and contacted me about them. They mentioned also searching eBay. Well, I ended up seeing some at ... Ariel Hydra VME single board DSP computer http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=162&item=2302043683 I talked to the seller and he thought he had a thousand dollar reserve on them. I told him, no, no reserve, just $500 opening bid. He had made a mistake listing it and ended the auction because of his mistake. I couldn't buy them. My buying budget couldn't cover $1000 boards that I wasn't sure were even going to be the right part ( minor difference in last digit of part number) and I'm not an extraordinarily strong player. But I gave the client the seller's phone number, and seems they may have had possibilities. Response from client ... > Bennett: > Will do. The boards on Ebay do not have the VSB option that we ideally require, however these boards still may > be workable. We are researching to find out what the slightly different part number denotes. We are still > interested in any additional leads you may be able to find. Thanks for your work on this! I still want to follow up and see if this worked out. Wish I could have made a little to cover my bills, but didn't seem doable on this one. But I might have saved you all a lot of money, and might have solved a national need. Can't post client contact info though. Having anyone pestering my clients would be a no no. But, might have built up the karma level. Right now I might see the light at the end of the tunnel on a project for the Saudi government. ( They are our allies ). Also just donated a chassis to Cornell University ... http://wwwapps.ups.com/etracking/tracking.cgi?TypeOfInquiryNumber=T&Inquiry… With chassis, you can't get enough for them to make them worth packaging and shipping. So my terms were the mailing center had to do it. Plus I didn't have suitable materials. Used to wish we could bring some of you with us, but you made it seem better to go it alone. Incidently, with the situation overseas, the US military and many defense contractors are currently re-evaluating their spares levels. Best Regards

23 years, 2 months

DEC VT 320 with Terminal Disease - help?

by trestivo＠concentric.net

Mark, I followed your thread about troubleshooting your monitor. I have a warehouse in Melbourne Florida with some good and probably some bad VT320's on the shelves. If you zero in on a bad part or suspect something as bad and would like to replace it send me an email and if I can pull one from a unit here it's yours for the cost of shipping. regards, thom

23 years, 2 months

3151 terminal keyboard

by j.pepas＠mail.utexas.edu

hello, I recently inherited an IBM 3151 terminal, but no keyboard! As some of you may know, this terminal used a keyboard with an RJ-45 jack on it. I have been able to find pinouts of both the terminal keyboard connector and a regular AT style keyboard. I connected all the wires appropriatly, but no go. The terminal still says "Problem in keyboard". so, two questions. 1) is it even possible to use an AT or PS/2 keyboard with a 3151 terminal? 2) if so, how? ps, I am not subscribed, so please cc to me. thanks, jason pepas

23 years, 2 months

Fwd: WTB: 8" floppy drive

by jss＠subatomix.com

BAU; reply to original author. ---------- Begin forwarded message ---------- From: Mohammad Asim Khan <masimk2003(a)yahoo.com> Date: Friday, February 21, 2003, 8:49:20 AM Subject: Required 8" Floppy Drive I need of Following 8" Floppy Drive. Please send me the detail and price of it. Model FDD-412 A Hitachi, Capacity 1.6 MB HHT 24v / 5v Thanks Mohamamd Asim Khan masimk2003(a)yahoo.com ---------- End forwarded message ---------- -- Jeffrey Sharp

23 years, 2 months

FYI: 25th Anniversary of Ward Christensen's BBS

by swtpc6800＠attbi.com

> Er, I don't think the modem was invented in late 50's. > While U.S. Robotics did not invent the modem, they were one of the first companies to sell them for home use. Here are some U.S. Robotics data sheets that I got in February 1978. http://www.swtpc.com/mholley/USR/USR_Modem.htm I don't want to argue about who was first to sell a modem. I just think it is neat that U.S. Robotics is still around and I have these data sheets Michael Holley www.swtpc.com/mholley Thanks to Jay West for providing the web servers for www.swtpc.com.

23 years, 2 months

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test-drb