test-drb

test-drb@ccmp.vtda.org

101090 discussions

Preservation of Historical Computer Systems

by Qstieee＠aol.com

I found Digital Technical Journal Volume 8 Number 3 which contains the subject article title by Burnet and Supnik. If they are on this list and approve it, I will scan this in and make it available.

23 years, 4 months

Cromemcos at Re-PC

by SecretaryBird＠SoftHome.net

Just out of curiosity, I am wondering... Did anyone here manage to score those Cromemco systems I mentioned a couple months ago that ended up being sent to Re-PC in Seattle? Just hoping that they found a good home. :) -- Scarletdown

23 years, 4 months

Broken SIMM tabs on Mac IIci

by doug_jackson＠citadel.com.au

I have had success in the past using a folded piece of paper (many times) to chock the broken simm. It may work, but it's a *really* messy solution Doug Jackson Director, Managed Security Services Citadel Securix +61 (0)2 6290 9011 (Ph) +61 (0)2 6262 6152 (Fax) +61 (0)414 986 878 (Mobile) Web: <www.citadel.com.au> Offices in Melbourne, Sydney, Canberra, Hong Kong, Boston -----Original Message----- From: Bob Lafleur [mailto:bob_lafleur@technologist.com] Sent: Friday, November 15, 2002 4:26 PM To: cctalk(a)classiccmp.org Subject: Broken SIMM tabs on Mac IIci Ok, so I did it... When trying to remove the SIMMS in my Mac IIci I broke some of the little tiny plastic tabs, so now the new SIMMs won't lock in. Is there some "fix" to get the SIMMs to stay in, short of soldering new sockets into the board (which I am not about to do)? Also, I broke them on Bank A. I assume you can't use RAM in Bank B without having Bank A full... Should I just trash the motherboard? Or can I salvage it somehow? Are these SIMM tabs particularly vulnerable, especially on this old equipment? I broke them on 2 machines, and on the 2nd one I did, I was trying to be very careful. - Bob (not a happy MACer today) CAUTION - The information in this message may be of a privileged or confidential nature intended only for the use of the addressee or someone authorised to receive the addressee's e-mail. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this email in error please notify postmaster(a)citadel.com.au. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Citadel Securix. Feel free to visit the Citadel Securix website! Click below. http://www.citadel.com.au

23 years, 4 months

ASR33 Problems

by david_comley＠yahoo.com

I consolidated Tony's and Dwight's comments onto one post... thanks to both for your comments so far. >Ah... Do you hapeen to know if the original position of the brush holder >was way out? If so, then it's possible the previous owner tried to >compensate for that using the 'rangefinder' adjustment on the RX module >(the slider + scale near the receiving magnet). Have you treid the affect >of this adjustment? I tweaked this last night to see what would happen, but there was no improvement. But it was an interesting exercise anyway. >You can elminiate the keyboard by trying the reader. If the reader works >perdectly, then the keyboard must be the problem. My guess is that it >won't, though. You can open the tope of the rrrreader and hold the tape >sensor down by hand. That will read continual Rubouts. Or hold down some >the pins too to get different characters. Of course if you have some >correctly punched tape, use that. Good idea - I re-connected the reader and tried it. The codebars track exactly what the sense pins read, so that would point to a keyboard problem. >Hang on... What happens if you press a (printing) key -- say 'A' and >REPT. Do you get consistently correct punching? What is printed? Always >the same (incorrect) chaaracter? (if so, which, and where is it on the >cylinder). A few different characters (again, where are they on the >cylinder)? Considerable improvement after working over the carriage again. Many of the characters now print correctly using the REPT workaround. Some examples that don't: Prints Typed As ----- ------ Q S (consistently) 8 : (consistently) 9 ; (consistently) X P,Z E E occasionally C W W occasionally G A C Haven't had time to analyze these yet in terms of where they lie on the typewheel. >Besides checking the clearence, it might be a good idea >to remove the keyboard and watch things while hitting >a key. You might see something a little sluggish. >You'll need to manually reset it after each keystroke. >It is a lot easier to see things when the machine isn't >jumping everytime you hit a key. >Dwight I'll try this again. I am sure that this is keyboard related. List of other things to fix: dashpot - carriage always sticks at l/h side. reader doesn't advance tape - presumably it should. Regards, Dave __________________________________________________ Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site http://webhosting.yahoo.com

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

> The PSU is an H7109-00. Mine says Model Number: H7109-C on it. >>Most DEC machines have at least one power-OK line from the PSU. > >I want to figure out which that one is. I think there is no such line. On the mainboard connector to the PSU, there are Red (3), Black (4), Orange (1), and Blue (1) wires. Red are all connected together, and all go to appx. 5 V when the system is on. Black are all connected together and to ground and are always at 0 V. Orange is one wire, and goes to appx. 12 V when the system is on. Blue is one wire, and goes to appx. 12 V. when the system is on. The red and black cross-connections are true on the mainboard and on the PSU. They are not all adjacent on the connector, which makes not much sense to me, but that's how it is. Red and Black on the mainboard connect to the corresponding colors on the Disk power connector. As for voltage: I really need a good DVM. Calibrated the 12V setting at work against a good 4-digit fluke DVM, so I think my reading of 12.1V for orange and -12.0 for blue is close. Did not have time to check at 5V, but afterward measured 3 Ray-o-Vac Renewal D cells in series at 4.7 V, so I may not be way far off. If so, my reading of 5.3 to 5.4 for the Red group is worrisome. This reading is consistent even at the Disk power connector. Anyone else have a good VOM, a working VLC, and 3 Renewal cells? Or just the VOM and either of the other two? >I have not figured out correlation between temperature and working status. I know more about it, now. Turned it on cold, it ran for a while, then failed, then started to try to boot again. Blew the hair dryer on it, it went into hard fail almost immediately and did not try to boot. Blew a fan on it, it went OK and actually ran far enough to give me a login prompt. In both cases I was trying to aim at the part of the mainboard near the power connector, but the system is so small I was probably affecting most of the mainboard and possibly a lot of the PSU as well. Near the power connector are two power-looking components (as in they have big leads, and in one case a heat-sink attach point, whereas nearly everything else is microscopic surface-mount stuff). One is a power-transistor looking thing with a heat-sink attach point (but no heat-sink) that has 3 pins and says LT1086CT 9151 The right leg is connected to 5.3 V (Red-wires). The center leg stays around 3.4 V, system running or failed. The left leg stays around 2.15 V, running or hung (as far as I can tell). The other is an 8-pin DIP that says M9124 LM393N QST Are these two part of a crowbar circuit, or reset circuit, or some such? Should I be able to see some clue about why the system hangs by looking at their pins? - Mark

23 years, 4 months

Looking for RL02 prints and maint docs

by spector＠zeitgeist.com

I just took delivery of a PDP-11/23 with (amongst other things) 4 RL02 drivers on it . The system was in the hands of another collector in florida and has not been powered up in quite a while. I would like to make sure the drivers are cleaned and lubed before I attempt to power them up... does anyone have any points to a print-set and maintenance data for these drives? Any experiences people have had bringing RL02s back to life would be greatly appreciated! Also, any pointers/experiences re: potential cleaning issues of old RL02 packs themselves would be helpful too... regards, David Spector ------------------------------------------------------------------------ - David HM Spector spector(a)zeitgeist.com software architecture - network/security consultation technical due diligence - technology planning/analysis Office:(631)261-5013 Cell: (631)431-5756

23 years, 4 months

ASR33 Problems

by dwightk.elvey＠amd.com

>From: "David Comley" <david_comley(a)yahoo.com> > >>Hi >> You haven't made it clear about punching. Does it >work >>correctly when you use the punch?? If it does, it >can't >>be the keyboard, distributor or codebars. All of >these must >>work to have the punch work correctly. The punch is >>mechanically connected to the code bars of the >printer. > >When I punch single characters to tape, they punch >incorrectly. When I hold REPT and punch to tape, the >correct character is punched. Hi Ok, this is entirely different. I would have to agree that it is more likely in the keyboard. Nothing much else would cause this problem. Most all of the other moving parts would respond close to the same for the repeat key ( still might be something that is sticky though ). Besides checking the clearence, it might be a good idea to remove the keyboard and watch things while hitting a key. You might see something a little sluggish. You'll need to manually reset it after each keystroke. It is a lot easier to see things when the machine isn't jumping everytime you hit a key. Dwight > >I had the keyboard apart last night. Cleaned the >contact wires and the common terminals. Tonight I am >planning to reset the contact wire clearances as the >manual comments on contact bounce being an issue. > >Regards, > >Dave > > >__________________________________________________ >Do you Yahoo!? >U2 on LAUNCH - Exclusive greatest hits videos >http://launch.yahoo.com/u2 >

23 years, 4 months

Apple Service Source

by Marion.Bates＠Dartmouth.EDU

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23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

Antonio said: >I opened up my VLC and it has an H7109-C PSU in it. Ok, good. Matches mine, so at least I know where to get another one of those. >Can't you either borrow >a known good one or at the very least pick up a VLC >from ebay for less than $50? Possibly, exploring that. But I'm reluctant to board-swap until/unless I get reasonably strong evidence that it really is the PSU. Although in this case, the failure is obviously not enough to fry anything, so I'm not so likely to damage the known-good component by board-swapping. This PSU is pretty clean and doesn't show much evidence of damage. Though I'll bet a capacitor with bad ESR looks like a healthy capacitor. --- Thanks for the reference, Frank! JT Computer may well end up $50 richer. --- Tony said: >_Sometimes_ the voltages are marked on the PSU PCB (particularly if it's >a 3rd-party unit). But I guess you've looked there. I did not unscrew the PCB from its mounting plate so I could see the back side. But all the Red wires soldered down to little metal strain-relief collars standing side by side, with resistance between them = 0. Likewise for all the Black wires. Resistance Red/Black was about 5 Ohms, FWIW. >What you are >looking for is a +5V or ground signal that's _not_ directly connected to >the appropriate PSU output (check this with an ohmmeter with the machine off) I'm pretty sure it doesn't exist. See my earlier post. >Buy a can of freezer spray. It's not _that_ expensive, and it'll do the >job properly. Plan A for the weekend involves a trip to the local elx. place. I'll try to get freezer spray and replacements for all of the electrolytics near the output wires on the PSU. Then I'll try to nerve myself for some soldering. I'll keep the freezer spray away from the PSU. ---- Toth said: >It certainly sounds like something is overheating. You might want to try >using some cardboard to carefully direct the airflow from your hair dryer. OK, will try it tonight. >Do these systems have an internal fan? I haven't been inside one enough to >remember, but if they do, is the one in your system running properly? Two, side-by-side, mounted in the PSU housing. They suck air out of the mainboard compartment into the PSU housing, and it then exhausts out the far side of the case. They are not far from the connector and the components I listed. Both of them turn when the switch goes on. (Thanks for the suggestion, Emanuel!) Both had a *little* dirt around them, but I cleaned that up (and both still turn). The SCSI cable partially obstructs their apertures - I'll try to alleviate that. >Linear Technology 1.5A adjustable voltage regulator, TO-220 package. That's it. ... (!) "100% Thermal Shutdown Functional Test." !?!?!? Maybe I'll give that part some stricter attention with the hair-dryer. Any chance that thermal-shutdown function could be getting too sensitive on me? Or that its thermal mounting has been messed up somehow? The mounting tab looks like it could go to a heat-sink, but there's no heat-sink attached. But there *is* a matching hole underneath in the mainboard! How do I know if it goes into thermal shutdown? >Low Power Low Offset Voltage Dual Comparator > >Datasheets can be found here: > http://www.national.com/pf/LM/LM393.html Ok, what's it doing there? Anyway, I'm going to try to probe its outputs tonight and see whether they are in different states when the machine is locked up. As always, I'm indebted for all your help! More reports tomorrow. - Mark

23 years, 4 months

Removing Mac IIci floppy to replace battery

by bob_lafleur＠technologist.com

Does anyone know the trick to get the Mac IIci floppy drive out to gain access to the battery? I've got the hard drive out, and I took out the (1) screw in the upper-left of the drive holder. Are there release clips to release the drive holder? If so, where? Thanks. - Bob

23 years, 4 months

Putting PDP11/44 on the net...?

by djg＠drs-esg.com

For my online PDP-8 I have it attached to a serial port on my web server/gateway machine (which also meets the 10 year rule, a Swan 486 upgraded to 133 MHz runing Linux). I have a program I wrote which is run from inetd when somebody telnets to the port. It sets up the serial port and knows enough telnet protocol to tell the other end to go into unbuffered mode. ftp://ftp.pdp8.net/software/serial_telnet/ It logs the serial traffic to /tmp and errors to syslog. The errors are harmless cmd and option ignored messages for parts of the protocol it ignores. It also uses a lock file in /var/lock to prevent multiple connections. I also have the PDP-8 power controllers on the PC parallel port with a custom board so I can power up the machine when someone want to use it. David Gesswein http://www.pdp8.net/ -- Run an old computer with blinkenlights.

23 years, 4 months

TI Explorer or 1500 software/docs?

by foo＠siconic.com

Does anyone here have a TI Explorer or TI 1500? I'm especially after the original manuals and software that came with it, specifically a program called "LMENU" (something like that). If anyone has it and wants to make a little dough please come forward. <sellam(a)vintage.org> Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

John Allain wrote: >Get the PSU part number and I'll look it up, >or check: > http://pages.prodigy.net/ppsjm/PART+ACU-20NUMBER.htm Prodigy says that URL is not found. However http://pages.prodigy.net/ppsjm/PART%20NUMBER.htm works....Oh. I get it. AAARRRGGHHHH! ;-) But no H7109 listed. And Antonio supplied: > The PSU is an H7109-00. Google for H7109-00 turns up nothing. Google for H7109 turns up two dealers (the cheapest in Irving, TX(!), at http://www.jtcomputer.com) which list an H7109-C as a "VAXSTATION 4000 VLC POWER SUPP". This is the same thing, yes? Anybody have experience with, or opinions on, that dealer? There are also multiple other H7109 (-A, -B) listed, which look not to be what I'm after. --- Tony Duell wrote: >Most DEC machines have at least one power-OK line from the PSU. I want to figure out which that one is. >OK, how many pins is the connector between the PSU and the mainboard? Will count, but order of 9. >You've identified +5 and +12 (and ground) -- presumably on the disk power >connector. Exactly. It was an informed guess - Orange insulation for +12, and red for +5, and Black for Ground. >Can you find those on the mainboard connector? There were similar colors on wires from the mainboard PS connector to the Power supply. I actually measured the voltages on the Power-supply side of that connection, not on the mainboard or the disk-drive connector. I checked that the resistances between what I thought were the corresponding pins on the mainboard PS connector and the mainboard disk-drive connector were 0 (with everything unplugged), just to be sure. Probably I should double-check voltages on the disk-drive connector, to rule out connector problems at the mainboard-PS connector. >What's left? >Probably at least one -ve voltage. And maybe a power-OK line. Oh, I also found -12V (found by accident - needle swung the wrong way) and it was about -11.5 V (I think). That was a blue wire. Forgot to report that. There were about 5 wires I did not check. I'll look at them tonight; if I'm lucky, the power-OK indicator, if present, will switch from one state to the other while I'm watching it. Hopefully it'll stay in each state long enough that I can see the needle move. >One of the few components that gets better when warm is a faulty >electrolytic capacitor. I have not figured out correlation between temperature and working status. Yesterday morning it worked for a long time when booted up from cold, then failed. Cycling power did not make it work better. >It's a pity you don't have a 'scope (to look for >ripple on the PSU lines) or an ESR meter (to check all the electrolytics >on the secondary side of the PSU). I've been thinking that, but unlike my wife's hobby (sewing) my hobby does not turn a profit (or rather, displace household expenditures). Though I might claim some credit if I ever get around to fixing that $%^&* Stylewriter.... Anyway the o-scope and ESR meter budget is zero at the moment. Sigh. >This does sound like power trouble. If not, then maybe gently warming >(hair dryer) and cooling (freezer spray) the components on the mainboard >will identify any that have gone thermally intermitant. Ooo, neat idea. The hair dryer I have. Don't have freezer spray, but maybe I can use a bike tire or something. Is there any reason (other than the possibility of slowly fatal electrocution) not to try the same trick on the power supply? I'd have to run it opened up and avoid touching the heat-sinks, etc, but I don't recall any reason it shouldn't run that way. - Mark

23 years, 4 months

Got a Apple Cube at Auction and Other items

by jrkeys＠concentric.net

Yesterday I picked up a Apple Cube, Pro KB, the two clear plastic speakers, power brick, and VGA extension cable from a guy outside of the auction. Had I got there 20 minutes earlier I could of had all the above and a 17" monitor all for $60. Now if I could just locate a cool looking clear plastic G4 tower and a Apple flat panel for under a $100. :-) Also got a IBM PC XT model 286 (5162) needs to be cleaned up a bit before a test run can be made. Got a strange looking device by Imsi called a PC Stylus. And a Apple High Resolution RGB monitor.

23 years, 4 months

ASR33 Problems

by david_comley＠yahoo.com

>Hi > You haven't made it clear about punching. Does it work >correctly when you use the punch?? If it does, it can't >be the keyboard, distributor or codebars. All of these must >work to have the punch work correctly. The punch is >mechanically connected to the code bars of the printer. When I punch single characters to tape, they punch incorrectly. When I hold REPT and punch to tape, the correct character is punched. I had the keyboard apart last night. Cleaned the contact wires and the common terminals. Tonight I am planning to reset the contact wire clearances as the manual comments on contact bounce being an issue. Regards, Dave __________________________________________________ Do you Yahoo!? U2 on LAUNCH - Exclusive greatest hits videos http://launch.yahoo.com/u2

23 years, 4 months

Wanted: PSU components for a VAX 11/750

by jwillis＠arielusa.com

Wanted: Any or all of the following: -875 Power Controller -H7104-C 2.5VDC PSU -H7104-D 5VDC PSU

23 years, 4 months

name that DEC control panel!

by healyzh＠aracnet.com

> anyone know what machine this panel comes from? > The seller claims it's a PDP-11 but I don't see enough bits. > Possibly a PDP-8 or educational unit? I've never seen the > lights along the side - on an '11.. > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2070195230 Here is what I posted a couple days ago to info-pdp11. BTW, someone else commented that the actual CPU on the M7341 is a i8008. Zane "1.1 Introduction Digital Equipment Corporation's Microprocessor Series (MPS) consists of a group of four M series modules and an optional operators control panel, designed to efficiently perform a range of process control and decision-making functions that were previously uneconomic subjects for automation. When used together, these modules can from low-cost digital control systems that exhibit the characteristics normally attributed to more costly minicomputer-based systems. With this capability, systems structured from MPS modules can perform the functions of dedicated controllers, operate as a Central Processor Unit (CPU) in intellegent terminals, perform data aquisition and analysis tasks in the laboratory, and automate a host of industrial processes 1.2 General Description The Microprocessor Series is listed below by model number and name: * M7341 Processor Module * M7344-YA 1K Read/Write Memory Module * M7344-YB 2K Read/Write Memory Module * M7344-YC 4K Read/Write Memory Module * M7345 Programmable Read-Only Memory Module * M7346 External Event Detection Module * KC341 Monitor/Control Panel In a systems context, the M7341 Processor Module (PM) acts as the central processor unit with the remaining modules performing supporting functions. Activity in a given system, then, is directed by a unique stored program contained in a read/write and/or a programmable read-only memory and executed by the PM. A major factor in the structuring of an MPS system for a specific application is the development of this unique system program by the user. To support user development of application software, Digital provides the Microprocessor Series Software Tools (MPSST) package that includes the following routines: * Microprocessor Langauge Editor (MLE) * Microprocessor Langauge Assembler (MLA) * Microprocessor Read-Only Memory Programmer (MRP) * Microprocessor Host Loader (MHL) * Microprocessor Debugging Program (MDP) * Master Tape Duplicator (MTD) In addition, the Microprocessor Program Loader (MPL) is available to users of the optional KC341 Monitor Control Panel." In looking further at the handbook it appears that the MPSST package is run on a PDP-8/e, /f or /m and is papertape based. The MRP expects a MR873 PROM writer to be used in conjunction with the PDP-8. Looks like an interesting device, to bad the one on ebay is just the front panel.

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by Antonio.Carlini＠riverstonenet.com

>Google for H7109 turns up two dealers (the cheapest in Irving, TX(!), at >http://www.jtcomputer.com) which list an H7109-C as a "VAXSTATION 4000 VLC POWER SUPP". This is the >same thing, yes? Anybody have experience with, or opinions on, that dealer? There are also multiple >other H7109 (-A, -B) listed, which look not to be what I'm after. I opened up my VLC and it has an H7109-C PSU in it. Some googling suggests that an H7109-A is for a VT1000 and an H7109-B is for a VXT2000. They may well be similar in size from what I remember of the respective enclosures. I'd power up and check a few voltages but my multimeter is in the office ($70K logic analyser, $20K scope, no multimeter - at least not with leads I can find!. Tsk) Isn't $50 a bit steep for a PSU? Can't you either borrow a known good one or at the very least pick up a VLC >from ebay for less than $50? Last time I opened up one of these PSUs (admittedly a VS4000-90 one) it didn't look that hairy (OK - all I had to do was dig out enough dust and cruft to let it spin its fans and come up ...). If you knew that a replacement PSU fixed the problem, you'd know that you had a tractable problem and where to concentrate. Equally if a new PSU did not help even with only the mainboard connected, you'd know that you were likely to be in for a *much* harder time. Antonio

23 years, 4 months

Putting PDP11/44 on the net...?

by pete＠dunnington.u-net.com

On Nov 12, 14:42, John Lawson wrote: > > Since I'm (mostly to very dumb) when it comes to these things - I would > like to ask for opinions/advice/recommendations from the List on what the > best way would be to attach one of the terminal ports on the machine to > the Net, to allow folks to telnet in and play with the system remotely. > > I was thinking phone-line -> modem-> Net-to-serial-box-> 11/44 port. Do you have some sort of "always-on" connection from the your local network to the Internet? Or do you use dialup? The easiest way is to use a terminal server box: net -> terminal server -> 11/44 port A suitable terminal server might be smething like a Shivaport (recent hence moderately expensive), an old Emulex Performance 4000 or Performance 2000 (if you can find a cheap one that's not died), a Racal Interlan, a Xylogics Annex, or any of several other possible brands that you might pick up secondhand. Not Windows Terminal Services or the LTSP (Linux Terminal Server Project), though -- they're for thin clients for Windows/Unix. DEC used to make a suitable box themselves. Although they're called "terminal servers", most -- including all the ones I've mentioned -- can be configured so you telnet in to them and make a serial connection out to one of the serial ports, which looks to the machine it's connected to as if a serial terminal has connected to it. On many of them, the serial port you connect to can be automatically chosen according to the port number you use in the telnet command (eg telnet tsrv01 3003 might be used to establish a connection to whatever's on serial port 3 of tsrv01). We use several of them to get remote access to the console serial lines of key switches and routers across campus, and I have a couple at home which allow my Unix machine to connect to the serial ports on various machines, including a couple of PDP-11s. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

TI Explorer or 1500 software/docs?

by xds_sigma7＠hotmail.com

Well, I don't have any manuals, or even or a terminal, or for that matter, the side of the case... But I do have a TI 1500.. If you get software and manuals, I could use copies please... Will J _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus

23 years, 4 months

Terminal Servers [was: Putting PDP11/44 on the net]

by fmc＠reanimators.org

David Woyciesjes <dwoyciesjes(a)comcast.net> wrote: > Speaking of terminal servers, I picked up a pair of Datability Vista > VCP-1000 terminal servers when my (old) work were going to just toss > them out. Anybody have any experience with these? Where I used to work, I took to calling ours the "Disability". It earned the name. LAT: pretty good TCP/IP: would sometimes lose its configuration SLIP/PPP: usable, if you're willing to give all your users the "enable" password (we weren't) At least that was my experience with one of them around 1992-1993. Rumor was that there was a later firmware revision that addressed some of the TCP/IP and PPP problems but it never made its way into our units. The unit that was used primarily to hook a bunch of terminals to a smaller bunch of VMS hosts with LAT just worked, the one that we expected to do TCP/IP stuff was a real pain. -Frank McConnell

23 years, 4 months

Putting PDP11/44 on the net...?

by pete＠dunnington.u-net.com

On Nov 12, 21:29, Sellam Ismail wrote: > On Tue, 12 Nov 2002, Peter Turnbull wrote: > > > Although they're called "terminal servers", most -- including all the ones > > I've mentioned -- can be configured so you telnet in to them and make a > > serial connection out to one of the serial ports, which looks to the > > machine it's connected to as if a serial terminal has connected to it. On > > This can also be done with a Linux box (a homebrew terminal server). > Multi-port serial cards can be found for very reasonable prices. > > I'm sure there's a package that someone's already written to do this too. There's something called Linux Terminal Server Poject (LTSP) but it's a different sort of thing. It's to support thin client network machines, not serial lines. You could certainly do the job with a Linux machine, even for a dialup into the Linux machine to connect the caller to another serial port, but it would require some programming. Terminal server hardware designed to do the job would be easier and quicker to set up, and probably cheaper to run. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

More micom pictures...

by wh.sudbrink＠verizon.net

Due to popular demand, I've added close ups of the keyboard and each of the circuit boards. The board pics are linked from the main picture page. They came out a little fuzzy (can't read the chip numbers). I'll try again tomorrow. http://osi.webhop.net Follow the links. I think I'll start dragging out my OSIs and taking pictures of them next. Bill

23 years, 4 months

FW: Huge lot of DEC parts on E-pay

by kyrrin＠bluefeathertech.com

Found on Usenet. The starting bid is a bit high, but perhaps listmembers could pool resources...? I leave it to you to decide. If I were still collecting, I'd chip in a bit myself. Forwarded note follows... -=-=-=-=-=-=-=-=-=- From: "Douglas A. Gwyn" <DAGwyn(a)null.net> Newsgroups: comp.sys.dec.micro Subject: 26,000 Good DEC Spare Parts on eBay, Item # 2068638523 Complete inventory from jcmparts, guaranteed working and individually packaged. PDP parts( pdp8 11/34 11/44 11/70 etc), VAX parts( 11/780 11/785 VAX 6000 Series Vax 8000 series etc), Terminal parts( VT100 VT320 VT420 etc), Tape and Disk drive parts (RA81 RL02 RA80 etc), printer parts( LA100 LA120 LA36 LA75 LA50 etc) etc. ** If there is no bid over $3,500 for the entire lot, the material will be scrapped out for gold reclamation. ** Hopefully some DEC hobbyist will acquire this rather than see it scrapped! If I had more $$ I'd do it myself. -=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin(a)bluefeathertech.com "I'll get a life when someone demonstrates that it would be superior to what I have now..." (Taki Kogoma, aka Gym Z. Quirk)

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by Antonio.Carlini＠riverstonenet.com

>* Is there a service manual on-line for this machine? Any suggestions on >where to get one? I want things like connector pinouts (to see if there's a >power-fail line, or some such, and what it's expected to be), expected PS >voltages, things like that. There is a service manual (two IIRC - one for the VLC and one for the VLC and 4000-60 combined). The PSU is an H7109-00. >3) now, left power-on, the 8 LED's are on most of the time. Occasionally, All LEDs on is listed as "Power applied but no instruction run". If it always did this then the CPU system would be suspect (which is not really terribly good ...). However, given the symptoms described, I'd agree with the other posters who suspect a PSU issue. Antonio

23 years, 4 months

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