test-drb June 2009

test-drb@ccmp.vtda.org

233 participants
404 discussions

by healyzh＠aracnet.com

At 12:17 PM +0000 6/23/09, shumaker at att.net wrote: >There 4 VAX 11/750s available on Craigslist in Kent Wash. Owner >claims they came from Boeing. no other details listed. he wants >$500 each. > >craigslist Seattle-Tacoma PostingID: 1231299617 To much, no space, and no time. :-( I'd love a VAX 11/750. 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/ |

14 years, 12 months

Vaxen available!

by shumaker＠att.net

There 4 VAX 11/750s available on Craigslist in Kent Wash. Owner claims they came from Boeing. no other details listed. he wants $500 each. craigslist Seattle-Tacoma PostingID: 1231299617

14 years, 12 months

WTB SCSI-50 to Centronics, mfm, esdi and flat floppy cables (for 5'25 units) (Spain)

by spedraja＠ono.com

I located some places where purchase it from Internet, but I should like to know if someone has some of these available. I need them to use in my PDP-11/23 PLUS. I pay the shipment plus a reasonable extra if neccesary. Regards Sergio

14 years, 12 months

WTB DEC cabinets (UK)

by silvercreekvalley＠yahoo.com

Looking for a 19" DEC rack - any height - if anyone has one. Its to house some RL02 drives which are currently languishing on various tables/floor space. Will collect, etc. UK only thanks. Would prefer DEC originals but anything considered really. Ian.

14 years, 12 months

DEC terminal

by slawmaster＠gmail.com

Don't know how often these come up; I spotted this while looking for a teletype for the office. http://cgi.ebay.com/Decital-Correspondent-Printer-Teletype-machine_W0QQitem… John -- "I've tried programming Ruby on Rails, following TechCrunch in my RSS reader, and drinking absinthe. It doesn't work. I'm going back to C, Hunter S. Thompson, and cheap whiskey." -- Ted Dziuba

14 years, 12 months

Tandy 1000 to a good home, CIB, Calgary area pick-up preferred

by aliensrcooluk＠yahoo.co.uk

Cool videos. It would be nice if I could revisit my old Spectrum games I made, but my parents have put my Spectrum 128K (in its original box) someplace 'safe' :( Regards, Andrew B aliensrcooluk at yahoo.co.uk --- On Wed, 17/6/09, Shane Dorosh <scd.calgary at shaw.ca> wrote: From: Shane Dorosh <scd.calgary at shaw.ca> Subject: Tandy 1000 to a good home, CIB, Calgary area pick-up preferred To: cctalk at classiccmp.org Date: Wednesday, 17 June, 2009, 6:10 PM Hi all, I've got a much loved old Tandy 1000 I've decided to part with.? It's still working, and it's been well cared-for.? It has 640KB of memory and a 20MB HD.? It comes with the original boxes, disks, and manuals, including the original BASIC manual!? The monitor is monochrome, not color. I'm looking for collectors of Radio Shack gear in the Calgary area who would like this computer and who can come pick it up.? Failing that, I will ship the Tandy out to someone if you pay the shipping.? This is a great collector's item, so I hope someone will reply! I still need the Tandy for another week or two... I'm putting up videos of my programming experiences on Youtube... http://www.youtube.com/watch?v=oEwkd2Lk7Vs http://www.youtube.com/watch?v=uWdsWmL_YFo ... but I should be done with it by the end of the month. Please let me know if you're interested! S. D. Calgary, Alberta P.S.? Last but not least, there's a DMP 430 dot matrix printer with the Tandy as well.? If you come to pick it up, I'll ask you to take it as well.? (I don't have a car, so I can't recycle it very easily myself.)? If you need me to ship the Tandy, though, I'm quite sure you will NOT want the printer, as it's huge and heavy and will probably double the shipping costs.

14 years, 12 months

ISA MFM disk controllers (From 19Jun09)

by gstreet＠indy.net

Hello Ian, IIRC, the debug commands worked with XT controllers. It seems that the debug commands will not work with the newer AT controllers that have their own BIOS. Also, aren't you talking about 5 1/2" drives? I thought that the smaller 3 1/2 drives were IDE drives, not MFM. Disclaimer: I might be wrong. Others might have better answers. Regards, Robert Greenstreet ------------------------------------------------------------------- Message: 9 Date: Fri, 19 Jun 2009 19:40:05 -0700 (PDT) From: Mr Ian Primus <ian_primus at yahoo.com> Subject: ISA MFM disk controllers To: cctalk at classiccmp.org Message-ID: <21393.98126.qm at web52703.mail.re2.yahoo.com> Content-Type: text/plain; charset=us-ascii Anyone remember the difference between the various Western Digital MFM disk controllers? I've got a few in front of me right now, and I'm trying to figure out which would be the best for this Compaq Portable 286. I've got the good ol' WD1002A-WX1, and what looks to be the bigger verison, the WD1002S-WX2, then another, even longer card, the one that came stock with the Compaq, the WD1015-PL03. Now, here's the dilemma. The stock card won't respond to the usual debug commands - they just freeze the computer. The original 20mb 3 1/2" Miniscribe hard drive is dead (won't even spin). I am going to replace it with a similar 3 1/2" form factor drive - the NEC D3142. (43mb! Woo!) I already got the drive formatted and working on the small WD1002A-WX1 card, but it's been a while since I worked with MFM controllers - and I seem to remember the WD1002S-WX2 being faster or something. Also, I don't remember the calculations for optimum interleave, I used 3, since that was the default.... Pointers? -Ian

14 years, 12 months

Hardware Hobbyists vs. Emulator Jockeys (was: Re: UNIX V7)

by roger.holmes＠microspot.co.uk

> From: Warren Wolfe <lists at databasics.us> On 15 Jun 2009, at 22:58, cctalk-request at classiccmp.org wrote: > It's just a matter of degree. I suspect there were very many more > valve > radios produced than classic computers, probably a couple orders of > magnitude. Yes, there were only around 150 to 200 of my classic computer made. Imagine the labour in manufacturing 4000+ PCBs with getting on for a hundred hand soldered joints on each. Then wire them all together, add a dozen heavy machines driven by 3/4 horsepower motors, a few hundred power supplies, a few hundred light bulbs, a few hundred cold cathode indicator displays, a dozen control panels, three phase fuse boxes and power filters, a hundred thousand ferrite washers hand threaded with six enamelled wires and the battleship grade frames holding it all and then add on about 60 jacks to support it and over a hundred castors to allow it to be installed or moved. No wonder they cost about a quarter of a million new in 1962. > However, even those will be, for all practical purposes, > gone in time. While it won't have any effect on you or me, run the > clock ahead a hundred years... and very little of either will remain. > > >> I guess if you want a particular model of classic computer you are >> going >> to have problems finding it, but there seem to be plenty of >> classics out >> there at the momnet if you'll work on just about anything. >> > > True... but, even WAY old classic computers are less than 50 years > old. I mean, is there even someone out there with an IBM 360? My machine was killed off by the introduction of the 360, i.e. its older. The ICT1301 was announced 1959 and my one (the first to leave the factory) was shipped in 1962. The IBM 360 was I understand announced in 1965, probably shipped quite soon after.

14 years, 12 months

Classic mac fun (and some questions) (continued...)

by trag＠io.com

> > Date: Sun, 14 Jun 2009 21:21:45 -0500 (CDT) > From: Doc <doc at vaxen.net> > Subject: Re: Classic mac fun (and some questions) (continued...) > Cameron Kaiser wrote: >> It should 'just boot' into the Installer. The Happy Mac you briefly get >> indicates that the Mac can see the disc, and the System Folder on it, so >> the CD-ROM is undoubtedly working. I'm still thinking about RAM being a >> problem, mind you, but your unit may just be plain broken if it's >> throwing >> bus errors. > > Or the terminator is bad, or if it's external, he's using an Iomega > 25->50-pin "SCSI" cable.... I would check along the lines that Doc suggested. Some times Apple's "bus failure" means a SCSI bus failure. Make sure that the SCSI chain is properly terminated. If you're using internal and external devices, confirm that both ends are terminated properly and neither end is double terminated. Check the SCSI IDs being used by all devices on the chain. Go ahead and just pull the SIMMs on the motherboard. There's 4 MB on the logic board and that should be enough to boot from, or if it gets that far, you'll get a message about lack of memory, which is further than you're getting now. If that happens, hold down the shift key during boot to not load extensions. That will often save enough memory to allow booting in 4 MB. I don't remember the beginning of this thread, but isn't there a suspicion that the internal hard drive is malfunctioning? Disconnect the internal hard drive completely, and only connect the CD-ROM drive. That will simplify your SCSI chain, and eliminate electronic babbling from the hard drive as a possibility. So, basically, pull the RAM and all SCSI devices other than the CDROM, make sure the CD-ROM drive is terminated and set to some ID other than 7 (SCSI ID 3 is traditional for CD-ROMs in a Mac) and try that. Also double check the cable you're using and try a different one if the first does not work. Once you get a successful boot, you can try adding things back in. Jeff Walther

14 years, 12 months

Combination and Orientation of RQDX boards in one PDP-11/23 PLUS

by spedraja＠ono.com

Well, for my surprise I've discovered a set of three boards in a lot that received from the US some months ago and I couldn't poen until now. It comes with three RQDX boards, more exactly: * 7555 * 7513 * RQDX distribution signal As far as I can imagine it appears that they were used in one PDP QBUS system in the order, from up to down in the order of the previous list, with one ribbon cable from the RQDX3 to the 7513 J1 (?) connector, and another one from the J2 (?) to the RQDX distribution board. Exists another connector (J3 ?) in the 7513 that appears to point to one external connector that I saw in one BA23. Finally, the RQDX comes with MFM cables but too with one standard floppy PC cable. I have some doubts with this last matter: * Is used this crossed floppy cable in DEC systems too (as in PeeCees) or it's used other kind of cables ? * I have a couple of RX33. Must I use TWO cables (one per floppy unit) ? * Same question with the MFM disks * What is the orientation of the RQDX ? I imagine it with the connectors side turn down because turning it up would be a problem with the previous board in the BA11-SB Can this be possible ? By the way, these questions connect with your last comments about the matter in the list, which is being an open book of knowledge for a newbie as me. Thanks all. Regards. Sergio

14 years, 12 months

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test-drb June 2009