test-drb January 2016

test-drb@ccmp.vtda.org

172 participants
198 discussions

by brain＠jbrain.com

http://www.ebay.com/itm/USED-KAYPRO-4-COMPUTER-MOTHERBOARD-/331730690952? The non soldermask boad on top of the main unit intrigues me. Does anyone know what it is? Jim -- Jim Brain brain at jbrain.com www.jbrain.com

8 years, 6 months

Any Collectors in Italy, near Milan?

by robert.jarratt＠ntlworld.com

I am going to be visiting Milan in a few weeks' time. I was wondering if there are any collectors on this list who live in that area, who would like to show off their collection, if I can get a bit of time away from the family? I have a particular interest in DEC machines, but other makes also interest me. If so, please get in touch Regards Rob

8 years, 6 months

Looking for an IBM SP/2 (the supercomputer, not a typo)

by jplist2008＠kiwigeek.com

I was contacted by a guy who works for a computing lab at a major US University on the East Coast who is looking for an SP/2 they can display in their lobby. I have one, but it'll be a monumental pain in the <cough> to get out of here. I wanted to drop a line and see if anyone had one they'd be willing to part with in the US, preferably near-ish to the right coast. Thanks all; - JP

8 years, 6 months

Preferred way of substituting TFT for CRT Monitor?

by Martin.Hepperle＠dlr.de

Yesterday I checked the 9000/217 98204B combo with my oscilloscope and I can confirm the 25kHz horz. frequency (1V down to 0.3V pulses every 40 us). I cannot measure the pixel clock as my oscilloscope was too cheap (I had to compromise) and thus cannot sample at higher MHz rates. I only see that it goes from 1V to approx. 2.2V. Just for my understanding: if I do the math: 512 pixels x 400 rows = 204'800 pixels at 50 Hz I end up with 10.2 MHz and at 60 Hz = 12.3 MHz. There is more "room" required for the retrace time, probably another 10% or so? So I understand that the monitor must be capable of ~25 kHz and 10...14 MHz and that I better try before buy. It is difficult to find specs for these HP 9000 video boards. In case it is useful for someone ... my list below is still missing DIO-bus type (1 or 2) and signal frequencies. 98204B Video Board medium resolution (512x390) monochrome for 35721 monitor, DIO-1 98542A Monochrome Video Board medium resolution (512x400) monochrome 98543A Color Video Board medium resolution (512x400) 16 colors 98544B Monochrome Video Board high resolution (1024x768) monochrome 98545A Color Video Board high resolution (1024x768) 16 colors 98546A/B Monochrome Video Board medium resolution (512x390) monochrome alpha/graphics, for 216/217 display compatibility (a pair of cards, compatible with 2136 and 217 displays (512x390, 25x80)) 98547A Color Video Board high resolution (1024x768) 64 colors 98548A Monochrome Video Board high resolution (1280x1024) high performance 98549A Color Video Board high resolution (1280x1024) high performance 98550A Color Video Board high resolution (1280x1024) high performance 98700A Graphics Display Station high resolution (1024x768) 256 colors 98710A Graphics Accelerator optional for 98700A 98720A High Performance Board high resolution (1280x1024) nur HP-UX, requires 98724AA interface and 98784A monitor 98730A High Performance Board high resolution (1280x1024) nur HP-UX 98722 memory upgrade optional for 98720A Martin

8 years, 6 months

Data Recovery Services

by jcw1231＠pacbell.net

I need to recover some files from a SCSI drive that failed over a decade ago.? Are there data recovery services that can determine if the files on the drive can be recovered or can actually do such a recovery?? Now that I think about it, I recently also had a fairly new Western Digital drive suddenly no longer be seen by any Windows PC and I really need many of the files on it.? Can anybody here tell me if drive manufacturers offer recovery services? I ask this since I saw a post somewhere that Seagate offers some sort of file recovery via cloud storage. As you can tell, I am by no means super-knowledgeable about modern systems since I am from the WANG 2200 MVP, WANG PC, and WANG Basic 2C era, and still have a few pieces of WANG hardware collecting dust. I apologize if I am posting this to a group where it is inappropriate. Thank You, John

8 years, 6 months

HP 2610A printer

by jwest＠classiccmp.org

Someone asked a question about it privately, I researched today and found the answers so I'll post here as well for posterity. The HP 2610A printer that I have.... 2610A was the HP designation for the Control Data Corporation 9322 Printer. HP sold the printer basically unmodified (as far as I can tell) and slapped their label on it. Mine seems to be in rather good condition so I suspect it will be restorable. In addition, I unearthed a full set of manuals/docs for the thing. Most manuals I have are HP ones, but a few in the binder are CDC manuals for it. At the same time, I also found several binders of docs for the HP 2754 (also have one of those). 2754 is the HP designation for the Teletype model 35KSR. HP sold the printing terminal/reader/punch with minor modifications and slapped their label on it. I have a complete set of docs, mostly HP branded but some (wiring lists, lubrication, disassembly, etc.) are Teletype branded. Various select pictures of the manual pages are at https://www.flickr.com/photos/131070638 at N02 J

8 years, 6 months

DECMate III +

by rodsmallwood＠btinternet.com

Does anybody have any experience with these. This one has the hard disk. You can hear it seek on startup. Setup works but it does not boot from the hard drive and just halts when presented with a system disk on a floppy. Rod

8 years, 6 months

Preferred way of substituting TFT for CRT Monitor?

by Martin.Hepperle＠dlr.de

> ------------------------------ > Message: 8 > Date: Mon, 18 Jan 2016 15:39:38 -0500 > From: "js at cimmeri.com<mailto:js at cimmeri.com>" <js at cimmeri.com<mailto:js at cimmeri.com>> > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org<mailto:cctalk at classiccmp.org>> > Subject: Re: Preferred way of substituting TFT for CRT Monitor? > Message-ID: <569D4D8A.4080505 at cimmeri.com<mailto:569D4D8A.4080505 at cimmeri.com>> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > . . . > You need a monitor (or converter) that supports 25khz. Here's the extent of my own research: > > 25khz 640x400 SOG monitors > > LCD > - NEC LCD1510+ (not tested) > > - NEC LCD1810 (LA-1831JMW-1) > Mac + PC -- fair performance, poor scaling. > HP 300/98543 -- works, but banded background cannot be completely > faded to black (I got rid of my 1810's for this reason). > > - Viewsonic Vp150 > HP300/98543 -- works well, great background, colors only fair. > > - Viewsonic VP181 > HP 300/98543 -- not perfect but can be adjusted ok. > banded background *can* be faded to black. > > - J. > ------------------------------ ah, this seems to become difficult... Thanks for the data and recommendations. I will have a look at low H-freq. monitors on ebay, maybe I have to revert to an old, heavy and large CRT. I see that many Viewsonic TFT monitors start at 24kHz. I also found http://www.ebay.de/itm/Gonbes-GBS-8200-CGA-15kHz-EGA-25kHz-Arcade-JAMMA-PCB… The technical data (http://www.extremehardware.webspace.virginmedia.com/ebay_images/GBS-8200.pdf) says: CGA / EGA - Auto Scan: 14.5 kHz - 16.5 kHz 23.5 kHz - 25.5 kHz <<<< this may fit the HP card? 3 0.5 kHz - 32.5 kHz Martin > ------------------------------ > Message: 9 > Date: Mon, 18 Jan 2016 21:07:27 +0000 > From: tony duell <ard at p850ug1.demon.co.uk<mailto:ard at p850ug1.demon.co.uk>> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org<mailto:cctalk at classiccmp.org>> > Subject: RE: Preferred way of substituting TFT for CRT Monitor? > Message-ID: > <A8192EF71C5C4946A240D25EDC8F9448027E4311 at EXMBX15.thus.cor<mailto:A8192EF71C5C4946A240D25EDC8F9448027E4311 at EXMBX15.thus.corp> > p<mailto:A8192EF71C5C4946A240D25EDC8F9448027E4311 at EXMBX15.thus.corp>> > Content-Type: text/plain; charset="us-ascii" > > > > indeed this machine has a 98204B video board (intended to work with a 35721 > monitor, > > which I don't have). I have not yet found the specs for its composite signal. > > It is normal composite video voltage levels with faster-than-normal horizontal scan rate. > If you have a frequency counter (or something that can be used as one, then put the 98204B > text board in the topmost position of the 9817, leaving out the graphics board > (the machine ill run without it) and take the top casing off the 9817. Take care to avoid the > live mains and worse on the PSU board, power it up, and check the HS and VS pins of the 6845 > (the only 40 pin IC on the board) > > Most, if not all, cheap composite video converters assume US or European TV rates and are > not going to lock to this thing. If anybody knows of an interface that will work, > I'd be interested to know about it too (I have a 9817 with the 98204B card, fortunately > I do have the right montor for it). > > -tony > ------------------------------ Tony, thank you for your explanations. As I understand, the unusual low horizontal frequency is the main problem. I saw that the card has a switch to toggle 50/60Hz vertical frequency (EU/US, original setting was at 60 Hz), but this did not help. I will see whether I can use my oscilloscope to catch the frequencies as I could not find a technical description of the 98204B. ... and I thought today such a simple problem could be easily solved with modern technology... Martin

8 years, 6 months

How to set this drive up?

by tulsamike3434＠gmail.com

On 01/19/2016 03:30 PM, Mike wrote: > Can someone please help me set this drive up and what should the little switched be set to on the back for drive 2 > > Sent from my iPhone. > -- *Mikes ATC Shop A how To Youtube Channel https://www.youtube.com/channel/UC5OzVS_CmCOLjjztbRiPuKQ?view_as=public 405-481-4715 * OOps I guess some pictures would be nice.. I would like the 3 1/4 drive to be my 2nd drive.* *http://nishtek.com/Ebay/1581_3.jpg What plugs in to what and *here are my questions *1/ there is a serial port next going from right to left there is a interface theb the tohhlr and i am not sure hie ti ser them then rge powre and last but not least the on and off switch.. Can this be use as a 2nd drive if so hoe do zi hook it up the right way? thank you sll in sdvsnce...

8 years, 6 months

Retrocomputing on StackExchange...

by geneb＠deltasoft.com

http://area51.stackexchange.com/proposals/94441/retro-computing I think this is actually a pretty good idea and StackExchange is a great platform. As of right now it needs 11 more people following it (and more questions). tnx. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

8 years, 6 months

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test-drb January 2016