test-drb

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101090 discussions

by ajp166＠bellatlantic.net

> >Subject: Re: CompuPro floppy controller differences > From: Fred Cisin <cisin at xenosoft.com> > Date: Mon, 18 Sep 2006 11:43:10 -0700 (PDT) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >> Many can. The original IBM PC version was a an abortion. > >It was way worse than that. >Calling it "an abortion" is an affront to those who are Pro-Choice. > I always miss that association.. But maybe the words atrocity, fubar and low grade hack get closer to how I feel. Never did feel the PC was good design, though I've held it up as an example of a bad design made to work passibly. Allison

19 years, 9 months

UK Science Museum Exhibition features PDP-1?

by jfoust＠threedee.com

At 07:04 AM 9/18/2006, you wrote: >Does anyone know if this is a real working PDP-1 or a mocked up, emulated >thingy? >Might be interesting for the games nostalgia for those (like me) whose >classic computing interest overlaps to classic gaming. >http://www.sciencemuseum.org.uk/exhibitions/gameon/ This exhibition was in Chicago at the Museum of Science and Industry two years ago. Looked like a real PDP-1 to me. I took pictures and I thought I posted something to this list about my visit, but I can't find it now. It was interesting for the kids and I, for me if only for the experience of seeing an Amiga under glass in a museum exhibit. :-) - John

19 years, 9 months

ATT 3b2 mouse

by dgriffi＠cs.csubak.edu

Does anyone know what sort of interface the AT&T 3b2 uses for its mouse? I found one which is missing its mouse. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

19 years, 9 months

Looking for DEC H7140 Power Supply Boards + H9545 Top

by g-wright＠att.net

Hi, Working on a 11/44 and need Cards for the power supply. Some where in its life someone had removed 3 of the boards. I move the cards from a 11/24 and it works. I also need the top cover to the cabinet H9545 . Which covers the 11/44 and allows the computer to be tilted up. Thanks, Jerry Jerry Wright g-wright at att.net

19 years, 9 months

classiccmp.org issues

by jwest＠classiccmp.org

Apparently sometime yesterday the sa/av system that frontends the classiccmp server was hit by a DDOS attack. The server did an admirable job for a while, but finally spiraled downward. I am still working on it and trying to implement a solution. Someone apparently isn't happy with bitsavers.org, as the DDOS attack is simply a dictionary generated email address in the bitsavers.org domain. It's coming from everywhere, so I can't just lock out certain servers. I'll get it stopped, things will be rocky for a bit, but it will be resolved soon. Jay West

19 years, 9 months

Capacitor Placement

by healyzh＠aracnet.com

I'm in the process of building a MAX233 Serial Interface for my C64, and have run into one bit of problem. Which way should the "+" side of the Cap I have go in the following circuit? http://www.petscii.com/telbbs/max233-interface.jpg Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

19 years, 9 months

no Issue 37?

by compoobah＠valleyimplants.com

Did anyone else not get Volume 37 Issue 37? Not sure if I should resend the posts I sent in that were skipped. Think I missed some other posts, perhaps.

19 years, 9 months

test

by jwest＠classiccmp.org

This is a test, please ignore and do not reply. Jay

19 years, 9 months

11/34a power supply/regulator question

by dundas＠caltech.edu

Thanks to Don and Tony for confirming my suspicions. The system as originally acquired had an RK11-D backplane in addition to the DD11-P. No cache nor FPP present though. Looks like I'll be needing some regulators... Thanks, John

19 years, 9 months

PDP8's, PDP11's, VAX's, drives, teletype, options, etc

by useddec＠gmail.com

I will be leaving from central IL on Thursday, Sept 21, to middle Wi, close > to Minneapolis/St. Paul, and returning on Sunday, Sept 24. I will be > picking up and delivering a variety of classic computer items, mostly DEC, > throughout the trip. If there is anything you might be interested in, please > contact me off list. Thanks, Paul Anderson 217-586-5361

19 years, 9 months

Test MSG Please Ignore

by healyzh＠aracnet.com

Just a test...

19 years, 9 months

SCSI CD burner

by ajp166＠bellatlantic.net

> >Subject: Re: SCSI CD burner > From: shoppa_classiccmp at trailing-edge.com (Tim Shoppa) > Date: Sat, 16 Sep 2006 07:31:05 -0400 > To: cctalk at classiccmp.org > >This brings up what is probably a more on-topic issue: I've never had >a CD burner (SCSI, IDE, whatever) last more than a year or two. Even if >only lightly used. Inevitably I just toss it and buy a faster one for >less $ than the first one cost. I had a 4x plextor scsi that was three years old and still cranking 6 CDs a week. I found that (50 systems in office environment) COOLING is everything. Those systems that were in coller spots in the building and had better internal cooling were far less troublesome for failures espeecially Disks and CDroms(CDRW). >Is there something I should be doing to preserve "classic" computer >CD readers/burners? Cooling and the slower ones seems to hold up far better suggesting vibration may be a factor. >I will admit that I have vengefully destroyed some very classic CD >readers (e.g. RRD50) purely out of spite for how dreadfully poor >performing they were. (A RRD50 is very optimistically "0.5X"). I >did the same with lots of RD5x MFM drives in the late 80's/early 90's, >oh how I despised RQDX/MFM hardware compared to the Emulex/Dilog/ >CMD/etc. clones! Yes, they are slugs, but I have several and the refuse to die! I can accept slow over broken anytime. ;) FYI the older Toshiba 1x and 2x SCSI CDreaders work well on VAX (CMD SCSI) are faster and seem to resist breaking. They also do not need trays. Related topic. CD burner on VAX (under VMS) has any one figured how to burn CDs? Allison

19 years, 9 months

Free floppy 3.5" disks - 720K or DSDD (UK)

by john_a_s2004＠hotmail.com

Hi, I have around 100 3.5" double sided 720K or DSDD floppies going spare (given to me by someone else having a clearout). These are suitable for certain older computers that are not compatible with newer HD disks. Most of the disks are unbranded, nearly all have pre-printed labels, all have write protect sliders. I am willing to send out in batches of 10 untested disks for the cost of postage (and Paypal charges if you want to pay that way). Postage will be roughly ?1.50 to the UK, please ask for international postage costs. I have formatted about 20 disks (on a PC), some disks took a couple of goes before showing zero bad sectors, a couple of disks I threw away as they kept showing errors. If you want these formated (tested) disks they are an extra ?1 for 10. Please e-mail me if you are interested, Regards, John _________________________________________________________________ Be the first to hear what's new at MSN - sign up to our free newsletters! http://www.msn.co.uk/newsletters

19 years, 9 months

Toshiba IHC-8000 (Pasopia Mini)

by cyberhusky69＠yahoo.de

Hello My name is Manou BILLA, I've found your request for the IHC-8000 on http://www.classiccmp.org/ pipermail/cctech/2004-May/029380.html I'm too looking tor a functional IHC-8000 with printer and TV modul if it ever appeared. So do you had success in acquiring the pocket computer? If yes do you know where one can still buy it? Thx a lot. Regards, Manou BILLA > Toshiba IHC-8000 (Pasopia Mini) > > Cameron Kaiser spectre at floodgap.com > Tue May 11 08:20:42 CDT 2004 > > Previous message: Pertec Interface > Next message: Apple Cable > Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] > > > Anyone out there know (or might be persuaded to part with >:-) any > source > on the Toshiba IHC-8000 (aka Pasopia Mini)? > > This was a small "pocket computer" circa 1983 with 4K of RAM and a > 24x1 > character LCD. Let me know if anyone remembers this unit, or better > still, > has one (working or not). > > -- > ---------------------------------- personal: http://www.armory.com/ > ~spectre/ -- > Cameron Kaiser, Floodgap Systems Ltd * So. Calif., USA * ckaiser > at floodgap.com > -- His mind is like a steel trap -- full of mice. -- Foghorn > Leghorn ---------- > > > > > > Previous message: Pertec Interface > Next message: Apple Cable > Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

19 years, 9 months

Sun 386i w/Monitor, keyboard, mouse free for pickup in southern NH

by dbetz＠xlisper.com

I offered a bunch of equipment here a little while ago and found takers for most of it. In fact, lots of the stuff has been picked up already. Thanks to all of you who picked up your equipment promptly! But, I have not found anyone who is willing to pickup my Sun 386i workstation with monochrome monitor, keyboard and mouse. Is anyone interested in this machine? If not, I'm going to have to take it to the dump. Unfortunately, I am not willing to package it up for shipping. If someone really wants it badly and is willing to pay for some place like Mailboxes Etc. to pack it up and ship it I can do that. I suspect that would be quite expensive though. So, any takers for a Sun 386i workstation? Thanks, David Betz dbetz at xlisper.com

19 years, 9 months

Teletype lubrication adviceu

by pete＠dunnington.plus.com

On Sep 14 2006, 23:00, Tony Duell wrote: > > > The parts manual exists, I have it. I only have one copy, though > (unlike the Techincal Manual where I have at least 2 of each volume, but > different editions IIRC). > > I might be able to be convinced to make a copy of it. It is, at least, > looseleaf... Hm... is it large? If it's not too big, I would pay for the copying. > > It says to lubricate the motor bearings at each end. But mine doesn't > > look like it was designed for that. > If this is the normal motor, then it's sort of sealed for life -- the end > housings are glued to the stator laminations, It's similar in > construction to the RX02 spindle motor IIRC. > > It can be lubricated, though. Take the motor out of the chassis, remove > the fan and the reduction gearing. There's a black plastic cover at each > end around the spidnle, these can be prised (pried) off. You can the > squirt some oil into the bearings. I think I'll leave that until after the event, when I have more time (I'm about to go on holiday) to do a full job. I've lubricated the shaft behind the motor, though, and a few other key points. Thanks for confirming that the motor is at least "sort of" sealed for life! -- Pete Peter Turnbull Network Manager University of York

19 years, 9 months

11/34a power supply/regulator question

by dundas＠caltech.edu

The recent discussion of Julian's PDP-11/34 inspired me to look at an abandoned one that I adopted some while ago. The particular computer in question is a /34A-DE. After looking at the prints and checking a few voltages, I find I have no +5. Reviewing the recent thread and looking closer at the prints, it seems that I am missing two H7441s. (It does have a H754 and H745, with the 54-10864-YA [Rev. L] distribution board.) Is that correct? It needs (one or) two H744 or H7441 (in my case) in order to operate? Thanks, John

19 years, 9 months

SCSI CD burner

by rtellason＠verizon.net

I've been going crazy here trying to get a burner working. One flat-out won't see a disc, even though I bought that one brand new (though that was a while ago and I made the mistake of continually using it for a CDROM drive as well), another one has mechanical problems, and then there's this external unit... It's a Yamaha CRW4260tx. I don't have a cable to connect from it to the Adaptec 2940 card that's installed in the machine. I currently have a 50-pin cable running from the inside connector on the Adaptec card to the internal connector on the drive (with its cover off). I'd like to put the drive in the box. Right now for both device number and termination these functions are handled by the external drive's box, on the rear panel. Can any of you guys help me with whether jumpers need to be _on_ or _off_ a pair of pins to make termination happen and to assign a device number? I'd measure it with a meter but don't have any handy means to get into those connectors at the moment... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

19 years, 9 months

SCSI CD burner

by technobug＠comcast.net

On Sat, 16 Sep 2006 07:31:05 -0400, shoppa_classiccmp at trailing- edge.com (Tim Shoppa) wrote: [...] > This brings up what is probably a more on-topic issue: I've never had > a CD burner (SCSI, IDE, whatever) last more than a year or two. > Even if > only lightly used. Inevitably I just toss it and buy a faster one for > less $ than the first one cost. > > Once or twice I opened it up and removed dust-bunnies but this never > helped. > > Is there something I should be doing to preserve "classic" computer > CD readers/burners? > > I will admit that I have vengefully destroyed some very classic CD > readers (e.g. RRD50) purely out of spite for how dreadfully poor > performing they were. (A RRD50 is very optimistically "0.5X"). I > did the same with lots of RD5x MFM drives in the late 80's/early 90's, > oh how I despised RQDX/MFM hardware compared to the Emulex/Dilog/ > CMD/etc. clones! > > Tim. > > > ------------------------------ The basic problem with commercial CD burners/players is that they keep the laser diodes on when powered, although at the low power required for reading. The life of run-of-the-mill laser diodes is on the order of 10,000 (10.000) hours. Consequently, if you keep your system on all the time you can expect one to two years of useful life >from the beast (some longer, some shorter). Industrial class machine monitor the output power of the diode and power it on only when used. With feedback they are able to correct the loss of output and consequently extend the useable lifetime. From <http://www.wtec.org/ loyola/opto/ad_rohm.htm>: "Rohm representatives pointed out that the LDs used in datacomm applications have more stringent lifetime requirements than those in CD players. For CD players, lifetimes of 10 4 hours are acceptable, while lifetimes approaching 10 5 hours are required in datacomm lasers. At the time of the JTEC visit, Rohm guaranteed laser diodes with lifetimes of 10 5 hours at 60 deg. C" I have several CD burners that have been operating for over 8 to 10 years (slow...). These are external units to my boxen which are powered on only when used. I too find that most of my readers in my old equipment are dead having been run continuously for may years. Besides run-time, temperature is also a factor. If you can power off the unit and keep it cool, you should effectively extend its useful lifetime. CRC

19 years, 9 months

SCSI CD burner

by ajp166＠bellatlantic.net

> >Subject: SCSI CD burner > From: "Roy J. Tellason" <rtellason at verizon.net> > Date: Sat, 16 Sep 2006 00:35:56 -0400 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >I've been going crazy here trying to get a burner working. One flat-out won't >see a disc, even though I bought that one brand new (though that was a while >ago and I made the mistake of continually using it for a CDROM drive as >well), another one has mechanical problems, and then there's this external >unit... > >It's a Yamaha CRW4260tx. I don't have a cable to connect from it to the >Adaptec 2940 card that's installed in the machine. I currently have a 50-pin >cable running from the inside connector on the Adaptec card to the internal >connector on the drive (with its cover off). > >I'd like to put the drive in the box. Right now for both device number and >termination these functions are handled by the external drive's box, on the >rear panel. > >Can any of you guys help me with whether jumpers need to be _on_ or _off_ a >pair of pins to make termination happen and to assign a device number? I'd >measure it with a meter but don't have any handy means to get into those >connectors at the moment... On the drive itself, next to the 50 pin, there is an array of jumpers and they (on mine) are marked as to what they do. They will need to be configured! Allison

19 years, 9 months

Lots of Manuals from Trip

by aek＠bitsavers.org

> Al, we will have to talk as I got a number of manuals from my NE/MO/KS trip Tnx. Docs/software for the SEL would be of the most interest. I have a huge backlog of unit record manuals. The docs/tapes you saw at Rudy's will be made available for your 910 as soon as they get here (actually, I don't know if the stuff was picked up before or after you were there). An inventory of the IBM stuff from TX would be useful too.

19 years, 9 months

Cleaning RK07 packs?

by fireflyst＠earthlink.net

HI all, I got some RK07 packs from Dan that I need to clean, two of which had those black (mold? Dirt?) dots on them, which came off easily. They do smell slightly musty inside but there's no mold or dirt on the inside of the pack. I'd like to hear some opinions on cleaning procedures and equipment for something like this. What do you guys think? Julian

19 years, 9 months

CompuPro floppy controller differences

by ajp166＠bellatlantic.net

> >Subject: RE: CompuPro floppy controller differences > From: "Richard A. Cini" <rcini at optonline.net> > Date: Sat, 09 Sep 2006 13:59:08 -0400 > To: "'General Discussion: On-Topic Posts Only'" <cctech at classiccmp.org> > >All: > > I looked at the CompuPro disk image on Dave Dunfield's site and it's >for an 8" drive. The defining thing for me is getting a CP/M 2.2 image in >5.25" format. I've found another controller, from CCS (California Computer >Systems) that might work, too. So does anyone have a 5.25" CP/M 80 image for >either of these two boards? > > Thanks. > >Rich All my CCS disks are 8" I'd have to look to see if the controller even did 5.25 it's been so long. I do remember the CCS used a banking scheme that didn't agree with most of my systems. Allison

19 years, 9 months

CompuPro floppy controller differences

by ajp166＠bellatlantic.net

> >Subject: RE: CompuPro floppy controller differences > From: "Chuck Guzis" <cclist at sydex.com> > Date: Fri, 15 Sep 2006 22:47:06 -0700 > To: cctalk at classiccmp.org > >On 9/15/2006 at 9:37 PM Richard A. Cini wrote: > >> Thoughts? > >What Dave said, but a few reminders. > >First, make sure that the drive is jumpered for high density by default, >since the density select line won't be active on the 8" connector. Or the 5.25 connector either! >Most 1.2MB 5.25" drives are jumpered to provide DISK CHANGED/ status on >pin 34; I believe the Disk 1 requires READY/, so change your jumpers >accordingly. The READY/ can be jumpered for 5.25 floppy use as it's not always there. The disk 1A has a jumper for this, if the disk1 does not then a red wire jumper on the back of the board will do this. Allison

19 years, 9 months

Lots of Manuals from Trip

by jrkeys＠concentric.net

Al, we will have to talk as I got a number of manuals from my NE/MO/KS trip and it will be awhile before I can put any of them on the web for folks to use. I have IBM manuals like, Customer Engineering Manual of Instruction for the 56 Card Verifier; Reference Manual 82, 83, and 84 Sorters; Parts Catalog 56 Verifier; and many more. I have several large boxes full of manuals and schematics for all sorts of unit record equipment, computers, and cards. The GA trip should also produce a gold mine of manuals.

19 years, 9 months

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