test-drb

test-drb@ccmp.vtda.org

101090 discussions

by aek＠spies.com

See previous discussions of this on the list. It is on the order of 10000 DPI. I have two fiche scanners, A 3M unit that I actually have software for, but requires manual positioning and a much older automatic unit with no docs or software. The effective resolution of the output is normally between 200 and 400 DPI after magnification between 20 and 30x.

22 years, 11 months

DEC RL02 anyone need one?

by aek＠spies.com

> Do you mean: "RL01/RL02 User Guide" EK-RL012-UG-005? No, I have that on line already. I'm looking for the RL02 Technical Manual part # EP-RL012-TM

22 years, 11 months

Teletype

by toresbe＠ifi.uio.no

This res. gets hot even when switched off, but just in the socket. I'm going to take pictures of the unit on wednesday, but a picture of the teletype with the cover on can be found at tore.nortia.no/bilder/s201002.jpg . ASCII drawings: (out of scale) ________________________ | | | | Blue slot with card that gets hot | |-- |/ | | || |_________________| || | | | |_________________|____| ____________ | | | (14 O ) | <- large resistor | | | (220ko)| <\ | (300ko)| | | | |- not sure | etc (vr) | | | | </ | _ | |||||| |||||| The resistor gets extremely hot when the 33 is plugged in. "Athlon without its fan"-style hot. -Tore "Insert quote with wierd Tore-humour here"

22 years, 11 months

Teletype

by dwightk.elvey＠amd.com

>From: ard(a)p850ug1.demon.co.uk > >> Whenever I type anything I just get a left-arrow. I am blaming the >> 1818-23/-21 for this. Shouldn't I? > >Maybe. Does the Model 33 work correctly when switched to 'local'? If not, >then you certainly have problems in the Teletype. If it does work in >'local' mode, then you might still have problems in the Teletype, but >problems with the interface are also possible. Hi It is also possible that he has the wrong speed gears/motor. A 60Hz motor will run in local with 50Hz connected but the Baud rate to the outside will be wrong. Dwight > >> >> OK; current loop. >> >> Would this explain a resistor (14 Ohm, big) in the slot of the KSR would > >Are you sure it's 14 ohms? I remember a multi-tapped power resistor with one >tap being about 1400 ohms in the standard current loop electronics for >the Model 33. > >> get extremely hot when off this loop? Also; Hans Pufal, I would be most > >And I think it does run hot. When switched to local, the teletype is >_still_ a current loop device, but the transmitter (keyboard contacts), >receiver (the selector magnet driver -- the little module with 2 >transsitors in the Teletype electronics chassis) and a 'local' power >supply (which includes that resistor) are all in series. A current loop, >but one entirely inside the Teletype Model 33. > >-tony

22 years, 11 months

Teletype

by dwightk.elvey＠amd.com

Hi I believe this is normal. According to the schematic I have, only the motor is switched. The transformer that supplies the current loop is still active. You must pull the plug when working on these. Dwight >From: "Tore Sinding Bekkedal" <toresbe(a)ifi.uio.no> > >This res. gets hot even when switched off, but just in the socket. I'm >going to take pictures of the unit on wednesday, but a picture of the >teletype with the cover on can be found at >tore.nortia.no/bilder/s201002.jpg . > > ASCII drawings: > (out of scale) > ________________________ > | | | | Blue slot with card that gets hot > | |-- |/ > | | || > |_________________| || > | | | > |_________________|____| > > ____________ > | | > | (14 O ) | <- large resistor > | | > | (220ko)| <\ > | (300ko)| | > | | |- not sure > | etc (vr) | | > | | </ > | _ | > |||||| |||||| > > The resistor gets extremely hot when the 33 is plugged in. > "Athlon without its fan"-style hot. > > >-Tore > >"Insert quote with wierd Tore-humour here"

22 years, 11 months

reforming PS caps w/primary-side components

by dwightk.elvey＠amd.com

Hi I think the rule is 0.5ma per cubic inch of computer grade capacitor and 0.25 ma per cubic inch of normal capacitor. As an example: 2" dia X 3 inch = 9.4 in^3 Cap voltage rating of 10V use 2.2K limiting resistor and 10V supply. Of course, if the capacitor is on a 5V rail, you'll need to disconnect one end. Dwight >From: "Luc Vande Velde" <luc(a)e2t.be> > >For years I use a high-voltage DC power supply with current limiting for >this. Works very fine... >Only a few, weird designs, need the AC voltage to start. >This is also a very safe way to repair the things (safe for the unit and the >technician) > >gr. > >Luc > > >-----Original Message----- >From: cctech-admin(a)classiccmp.org [mailto:cctech-admin@classiccmp.org]On >Behalf Of Robert Maxwell >Sent: Tuesday, June 03, 2003 5:21 PM >To: 'cctech(a)classiccmp.org' >Subject: RE: reforming PS caps w/primary-side components > > >-----Original Message----- >>Anybody want to offer advice on reforming filter >>caps? I'm planning to power up some stuff that >>hasn't seen voltage in a long time. My plan is >>to put several low-wattage light-bulbs in series >>with the thing, to limit the amount of current it >>will get, and hopefully allow those old caps >>to reform instead of, say, exploding in my face. >>... >>Now the questions: >> >>Could putting the light-bulbs (or whatever) in >>series on the primary side of the transformer >>actually produce the desired effect? IIRC, a >>step-down transformer divides the voltage but >>multiplies the current. So I'd have to limit the >>current on the primary side that much more to >>keep the secondary current down, right?> >> >>Also, what kinds of things could be damaged by >>getting less voltage than they were designed for? >>I could imagine hard disks spinning too little to >>lift the heads from the surface, for instance. >>(This is moot, because there are no hard disks >>in any of the equipment I'm looking at.) How >>about CRT's? Could too little deflection make >>the beam hit something it shouldn't? Anything >>else? >> >> Thanks, >> Bill. > >Bill, > (1) Don't use a light bulb - they have a very low resistance when cold, >and will cause the inrush you're trying to avoid. The best recommendation >I've seen is to use a "variac"-type variable transformer to reduce the >powerline going in. Start at minimum, and turn things up slowwwwly, watching >current draw. Beware gotchas like LSTTL drawing heavy current at around 2.1 >volts supply. Actually, with a meter across the capacitor supply, stop at >about one volt, so any semiconductors in line can't get terribly excited: if >there's no apparent short as things stabilize, turn the voltage up. > (2) CRTs aren't a hazard from undervoltage (I ran a sick Zenith TV on >85VAC for years using a Variac). It's overvoltage that causes X-Ray risks. >Just to be safe, disconnect anything mechanical, to avoid problems like the >hard-drive one you mentioned - some types of motor overheat if undervolt-ed. > >Bob "HW-Hacker" Maxwell >How many people do you know that sawed their computer in two?

22 years, 11 months

HP 80 Series software

by peterbrown10＠hotmail.com

Hi Joe, >I'd like get a copy if you have it. I'm running into a couple of >oddities when I try to operate it. It's working but not the way that I >expected and I don't know if I'm doing something wrong or what. I remember being slightly confused by the operation of the bus analyser too. It didn't really seem to make sense to me for some operations - I was never sure if it was broken or that was just the way it worked. I think that these things tend to be a little flaky / sensitive - I ended up constructing a single analyser that sort of worked from three analysers that didn't. >Steve Robertson ran into the same problem when he tried to use it to >study the disk operation as part of writing an OS for the HP 1000. He did >get some usefull info but only 32 bytes of it! That's right, the internal memory buffer in the bus analyser is only 32 bytes. You can either set it up to store 32 bytes from the bus or (I think), if you have the patience, you can manually (in binary) store 32 bytes in the memory and then have the analyser clock them out onto the bus. >I'm currently investigating another option. >NI make a GPIB+ card (ISA or PCI) that acts as both a GPIB controller and a >... >codes. I'll let you know how I get on. I've now had a chance to take a look at the NI GPIB+ cards in some detail. With the proviso that these cards only work under Windows 98 se or earlier and windows NT, they seem to be an excellent solution to seeing what is going on on an HPIB bus. The software can be set up to monitor all events on the HPIB bus, control lines, data lines, control words, data words etc. The card can also be set up to passively monitor the bus and add time stamps to the captured bus events. The only limitation to the number of events that can be stored in a capture file appears to be how much memory/disk space the capture machine has. The capture files can be exported in a text format and dumped into Word / Excel for further processing. >I have (had?) a card like that but NI no longer supports it and I >haven't been able to find any docs or software for it. If the card is a GPIB+ Controller/Analyser then the software is available for NT / Win98 - you need version 1.7 of the GPIB controller software from the NI website. >I have something else that might be usefull. It's Bus Analyzer module >made by HP that works with one of their logic analyzers. You plug the LA >pods directly into it (no wire leads) and it has sockets for RS-232, HP-IB >and one or two other standard interfaces. With it you can use a LA to grab >the data, disaasemble it (if you have the the disassembler), save it, send >it to a computer, etc. I've never tried to use it since I don't have the LA >(HP 1631 IIRC) that it works with. For me, after looking at the GPIB+ card it seems to be a 100% solution - I am very impressed with it - only the slightly ageing software lets it down. Peter _________________________________________________________________ It's fast, it's easy and it's free. Get MSN Messenger today! http://www.msn.co.uk/messenger

22 years, 11 months

reforming PS caps w/primary-side components

by luc＠e2t.be

For years I use a high-voltage DC power supply with current limiting for this. Works very fine... Only a few, weird designs, need the AC voltage to start. This is also a very safe way to repair the things (safe for the unit and the technician) gr. Luc -----Original Message----- From: cctech-admin(a)classiccmp.org [mailto:cctech-admin@classiccmp.org]On Behalf Of Robert Maxwell Sent: Tuesday, June 03, 2003 5:21 PM To: 'cctech(a)classiccmp.org' Subject: RE: reforming PS caps w/primary-side components -----Original Message----- >Anybody want to offer advice on reforming filter >caps? I'm planning to power up some stuff that >hasn't seen voltage in a long time. My plan is >to put several low-wattage light-bulbs in series >with the thing, to limit the amount of current it >will get, and hopefully allow those old caps >to reform instead of, say, exploding in my face. >... >Now the questions: > >Could putting the light-bulbs (or whatever) in >series on the primary side of the transformer >actually produce the desired effect? IIRC, a >step-down transformer divides the voltage but >multiplies the current. So I'd have to limit the >current on the primary side that much more to >keep the secondary current down, right?> > >Also, what kinds of things could be damaged by >getting less voltage than they were designed for? >I could imagine hard disks spinning too little to >lift the heads from the surface, for instance. >(This is moot, because there are no hard disks >in any of the equipment I'm looking at.) How >about CRT's? Could too little deflection make >the beam hit something it shouldn't? Anything >else? > > Thanks, > Bill. Bill, (1) Don't use a light bulb - they have a very low resistance when cold, and will cause the inrush you're trying to avoid. The best recommendation I've seen is to use a "variac"-type variable transformer to reduce the powerline going in. Start at minimum, and turn things up slowwwwly, watching current draw. Beware gotchas like LSTTL drawing heavy current at around 2.1 volts supply. Actually, with a meter across the capacitor supply, stop at about one volt, so any semiconductors in line can't get terribly excited: if there's no apparent short as things stabilize, turn the voltage up. (2) CRTs aren't a hazard from undervoltage (I ran a sick Zenith TV on 85VAC for years using a Variac). It's overvoltage that causes X-Ray risks. Just to be safe, disconnect anything mechanical, to avoid problems like the hard-drive one you mentioned - some types of motor overheat if undervolt-ed. Bob "HW-Hacker" Maxwell How many people do you know that sawed their computer in two?

22 years, 11 months

DEC RL02 anyone need one?

by grg2＠attbi.com

Hi, I have a DEC RL02, supposedly removed from a working system. Anybody want it? Anybody want to offe a few $$$ for the wear and tear on my back? It's a heavy beast, so expect $45 or so shipping cost in the USA. Regards, George

22 years, 11 months

reforming PS caps w/primary-side components

by RMaxwell＠atlantissi.com

-----Original Message----- >Anybody want to offer advice on reforming filter >caps? I'm planning to power up some stuff that >hasn't seen voltage in a long time. My plan is >to put several low-wattage light-bulbs in series >with the thing, to limit the amount of current it >will get, and hopefully allow those old caps >to reform instead of, say, exploding in my face. >... >Now the questions: > >Could putting the light-bulbs (or whatever) in >series on the primary side of the transformer >actually produce the desired effect? IIRC, a >step-down transformer divides the voltage but >multiplies the current. So I'd have to limit the >current on the primary side that much more to >keep the secondary current down, right?> > >Also, what kinds of things could be damaged by >getting less voltage than they were designed for? >I could imagine hard disks spinning too little to >lift the heads from the surface, for instance. >(This is moot, because there are no hard disks >in any of the equipment I'm looking at.) How >about CRT's? Could too little deflection make >the beam hit something it shouldn't? Anything >else? > > Thanks, > Bill. Bill, (1) Don't use a light bulb - they have a very low resistance when cold, and will cause the inrush you're trying to avoid. The best recommendation I've seen is to use a "variac"-type variable transformer to reduce the powerline going in. Start at minimum, and turn things up slowwwwly, watching current draw. Beware gotchas like LSTTL drawing heavy current at around 2.1 volts supply. Actually, with a meter across the capacitor supply, stop at about one volt, so any semiconductors in line can't get terribly excited: if there's no apparent short as things stabilize, turn the voltage up. (2) CRTs aren't a hazard from undervoltage (I ran a sick Zenith TV on 85VAC for years using a Variac). It's overvoltage that causes X-Ray risks. Just to be safe, disconnect anything mechanical, to avoid problems like the hard-drive one you mentioned - some types of motor overheat if undervolt-ed. Bob "HW-Hacker" Maxwell How many people do you know that sawed their computer in two?

22 years, 11 months

Display of first networked personal computer game returning

by GOOI＠oce.nl

I guess that's me! I am quite busy. In a few months (3) I have my own "PDP-11 garden house" (3,5 x 8 meters) just for PDP-11's. Then www.pdp-11.nl will see some new info. On http://home.hetnet.nl/~tshaj is a link to www.pdp-11.nl and to my StarShip project. Again, in a few months time, I will start new developments ... indeed time is a problem. The 'StarShip Simulation' of Dilithium Press is the Bible, but, as it should, use it for inspiration and do not follow it like a fanatic :-) - Henk. BTW. Megan, I have sent you the 68020 assembler source code of the kernel which supports task start/stop/suspend/resume and time-wait and semaphore-pend calls. Ever ported it to PDP-11? > -----Original Message----- > From: Megan [mailto:mbg@TheWorld.com] > Sent: dinsdag 3 juni 2003 15:46 > To: cctalk(a)classiccmp.org > Subject: Re: Display of first networked personal computer > game returning > > > I have a copy of the 'StarShip Simulation' and have also often > thought about rendering some code... > > alas, not enough time... > > I do know that there is someone on the net who has been trying > to actually build the hardware for a starship simulator and has > been basing his code on the 68000... I'm not sure where his page > is or if he reads CCMP. > > Megan

22 years, 11 months

Display of first networked personal computer game returning

by mbg＠TheWorld.com

I have a copy of the 'StarShip Simulation' and have also often thought about rendering some code... alas, not enough time... I do know that there is someone on the net who has been trying to actually build the hardware for a starship simulator and has been basing his code on the 68000... I'm not sure where his page is or if he reads CCMP. Megan

22 years, 11 months

FA-PDT-11/150 on eBay

by classiccmp＠crash.com

Jerome Fine wrote: . > Is there an actual Qbus - or something else? It certainly > sounds like a Qbus! The PDT has no Qbus. I believe the eBay auction has a picture with the top cover off and the top board elevated - you can make out a ribbon cable coming off the bottom board, and the paper insulating sheet that sits between the bottom two boards when closed. > Also, I presume there is no possibility of a hard drive? > How many DL ports are available? The PDT-11/150 was reportedly available with one or two RX01 drives, and three serial ports with another three optional. I've only seen the one I own, which has both drives and six ports. There're no other expansion options that I can recall. In fact it's sitting in the dining room with a VT100 waiting to be powered up to check some 8" floppies I received a while back. I'm in the process of bringing up a VAX 4000/500 I recently received and it'd be a hoot to connect the PDT to it. Did RT-11 ever include DECnet support? Probably so, but as of what version? I don't recall seeing mention of it with whatever version came with the PDT, and I'd be amazed if the PDT could support it... --Steve. smj(at)spamfree.crash.com (lose spamfree to get through, m'kay?)

22 years, 11 months

FA-PDT-11/150 on eBay

by mbg＠TheWorld.com

>I should hedge my bets here: There is no Qbus backplane in the >PDT-11/150. There are some stacking connectors between two dual- >height sized boards (serial ports and memory) on top and the >middle board, which carries the CPU complex. I believe the bottom >board in the stack is the floppy controller - not sure if the >console circuitry (8085 based?) is on that or the middle board. The interrupt processor on the PDT is an 8085(A)... Megan

22 years, 11 months

FA-PDT-11/150 on eBay

by mbg＠TheWorld.com

>The PDT-11/150 was reportedly available with one or two RX01 >drives, and three serial ports with another three optional. I've >only seen the one I own, which has both drives and six ports. >There're no other expansion options that I can recall. I've never seen one with only one drive, but I have seen some which didn't have the extra 3-line option. >In fact it's sitting in the dining room with a VT100 waiting to >be powered up to check some 8" floppies I received a while back. >I'm in the process of bringing up a VAX 4000/500 I recently >received and it'd be a hoot to connect the PDT to it. Remember, after powering it on, you type two '@' to autobaud and boot the unit. >Did RT-11 ever include DECnet support? Probably so, but as of >what version? I don't recall seeing mention of it with whatever >version came with the PDT, and I'd be amazed if the PDT could >support it... RT never came with DECnet support... DECnet was, however, available for it as a 'layered product'. The DECnet available for RT was Phase III, asynch/sync support only. No Phase IV/Ethernet. I know of someone who actually had a PDT running RT on the DEC internal network at one point... Megan

22 years, 11 months

FA-PDT-11/150 on eBay

by stuart＠stuartsjohnsonfamily.net

I noticed this on eBay and thought I'd post it here for those PDP-11 collectors among us: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2733136922&category=1247 The starting price ($199 US) seems high, but these are pretty hard to find. One possibly sour note though - the seller wants a flat rate of $150 to ship anywhere in North America. I picked up one of these in terrific condition last December for $25. It cost $65 to pack and ship the heavy thing, but it was worth it. I haven't seen another PDT sell since then. Stuart Johnson

22 years, 11 months

Jupiter Computer (No Not the ACE)

by Paul.HILLS＠uk.landisgyr.com

Sorry, I can't help you with your identification, but must point out that it can't be MUCH earlier than the Jupiter Ace, since both the Ace and the MC68010 processor were released in 1983, so the computer you have can be at most a few months earlier, and probably more recent since the Jupiter Ace ran for a shorter time than the 68010! Some CAD stations have multiple joysticks, also video editing consoles, or even studio music production equipment. Could it be something like that? Is there any clue from the location you found it (on the kerbside outside what building???). You may get more clues if you switch it on and see what comes up on the monitor! Good luck paul -----Original Message----- From: peter tremewen [mailto:ptremewe@bigpond.net.au] Sent: 01 June 2003 22:18 To: cctalk(a)classiccmp.org Subject: Jupiter Computer (No Not the ACE) Hi all, I have in my hands a "Jupiter" computer and am wondering if you can offer any info on it? It is not the Jupiter ACE home computer, but a much earlier very large and obviously fairly old rack mounted system. The computer is based on the 68010 CPU. I can't determine how much memory it has on board, but there are more than several banks of 4164 mem chips which if I remember is a 64kbit dynamic Ram device. The huge keyboard is attached via a missing multipair cable and has two joysticks on either side. The monitor has separate RGB and Sync cables, each of which are generated using separate discrete component boards in the chassis. Inside the chassis are two huge Vertex hard drives, and a 3.5 in floppy, each connected to their discrete driver boards, Z80 based. On the front of the computer is "Jupiter". Model number is J12CHAS and Man date is "514". It was manufactured in Berkeley C.A. USA. The serial number is "Jup.S.N. 12C-1025-AA". I basically found it all on a curbside and couldn't resist adding it too my rather small but now growing collection. If you need any further info to help with identification let me know, I'll see what I more I can get from the chassis. Maybe I'm insane and have just picked up what most would consider total junk, but I personally think that systems such as this are worth preserving. I haven't been brave enough to switch the damn thing on yet, with all that discrete hardware it will probably double my power bill with about a minutes use. However I love all this old stuff, and worse comes to worse at least their are some interesting discrete components in it. If you need or would like a photo let me know, I'm a freelance photographer and will take a few shots anyway, so when I do I'll pass some scans on to you. Peter T.

22 years, 11 months

Where have all the Selectrics gone?

by jontitus＠attbi.com

My Selectric III went in the local metal-recycle bin quite a few years ago. It was getting sticky and needed a thorough cleaning. The local IBM service center wanted $125 just to take a look at it, so enough was enough. I have not used a typewriter in the last 8 or so years, and don't miss it. I had a second Selectric my brother gave me, but during a move, one of the cast-metal parts gave up the ghost. It seemed too expensive to get it replaced, so it, too, went to the metal recycle bin. I suspect many other typewriters, Selectrics et al., met the same fate. My mother, 89, still uses a manual typewriter, but her sight is failing and she has a hard time getting the right roy of keys. Sometimes we have to sit at the keyboard and "decipher" her notes. She recently found a typewriter repair shop on Long Island (NY) that would repair and clean her manual unit. She got new type and a cleaned unit for about $85. That's a deal. Jon Jon Titus 36 Sunset Drive Milford, MA 01757-1362 USA Phone: +1-508-478-8040 E-mail: jontitus(a)attbi.com Member, National Association of Science Writers

22 years, 11 months

Teletype

by toresbe＠ifi.uio.no

Whenever I type anything I just get a left-arrow. I am blaming the 1818-23/-21 for this. Shouldn't I? OK; current loop. Would this explain a resistor (14 Ohm, big) in the slot of the KSR would get extremely hot when off this loop? Also; Hans Pufal, I would be most grateful for the schematics for the CL>RS232 converter. Also tell me more about the modifications made to the TTY control on the PDP? The card says 181823 on the solder side and 181821 on the other. Thanks! -Tore "Life's a bitch and then you turn on your PDP and it's all nice and when you turn it off it goes back to being a bitch. Repeat when nessecary. Oh, and you die, btw."

22 years, 11 months

(no subject)

by patbill75＠hotmail.com

I am having trouble on my toshiba laptop 210CT the screen goes dark when i am working on it i then pull the screen down towards me the back up and the screen then goes back to normal can you help thanks paul tel 020 8838 4943

22 years, 11 months

Collectors worldwide, UNITE!

by aek＠spies.com

How many people would publically claim to own a PERQ 3a, a PERQ T4, an HP95C, a DAP, a 370/E (which is not an IBM machine!) or something like that? == What's the point of having cool stuff if you can't say you have it? :-) I don't make a secret of the Xerox protos that I have. On the other hand there aren't a lot of people who know where they actually ARE..

22 years, 11 months

Collectors worldwide, UNITE!

by classiccmp＠crash.com

J.C. Wren wrote: . > What kind of machine could one possibly not admit to owning? That's > seems pretty wierd. I can imagine such a circumstance. Wasn't an Enigma device stolen >from a museum or collection not too long ago? Weren't the US$10,000+ sales of some Apple I's widely publicized? Some folks might not want to play the odds when publishing their holdings, if they're lucky enough to have some truly rare objects. --Steve. smj(at)spamfree.crash.com (lose spamfree to get through, m'kay?)

22 years, 11 months

Curt Vendel needs RK05 drive on east coast

by aek＠spies.com

Knowing Atari, there tapes were most definitely written on a PDP-11 system. == They are discs, not tapes. Atari switched from development on PDP-11's (an 11/60 that actually was at Weird Stuff when they were next door..) to a VAX in the early 80's. They are probably the RM05 packs from KIM:: -- I don't know about you, but I would be pretty surprised if Curt is going to find someone willing to put an unknown 12 platter pack in their RM05. I dont think Scopus or any of the disc inspection companies are even around any more. I have several dozen of those same vintage packs that I'm terrified to even try to put in a drive (not for a VAX..)

22 years, 11 months

Collectors worldwide, UNITE!

by dwightk.elvey＠amd.com

How about a Video Brain Really form someone other than Dwight >To: cctalk(a)classiccmp.org > > > What kind of machine could one possibly not admit to owning? > > >a PC ? > > > > ---snip---

22 years, 11 months

Curt Vendel needs RK05 drive on east coast

by aek＠spies.com

RM05 packs are 300mb cake platters... Quite different from 2.5mb RK05's

22 years, 11 months

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test-drb