test-drb February 2020

test-drb@ccmp.vtda.org

95 participants
82 discussions

by jwsmail＠jwsss.com

Any recent or other recommendations on shipping to Europe? Specifically to Italy? I have the packing arranged.? Item being shipped is an ASR33. budget right now is a bit beyond what the buyer has, but I have gotten the unit for him, and we need to figure how to get it there. weight will be 75 to 100#.? Shipping from Los Angeles.? Doesn't necessarily have to go express shipping, as long as the ride isn't too bad. So far not a lot of options, but Fedex freight has been checked out.? Just not sure of any other freight forwarders to use. thanks. Jim

6 years, 1 month

[Simh] Various

by paulkoning＠comcast.net

> On Feb 13, 2020, at 7:35 PM, Timothe Litt <litt at ieee.org> wrote: > > ... > Someone wrote a DECtape driver for VAX - I think Stan R., though it wasn't supported. DECtape controllers are odd devices - the TD10 is reasonably smart, but the others put realtime constraints on the drivers that could be hard to meet. Anyhow, by the time the VAX came out, TU58 and Floppies were cheaper and denser media. TU58, denser perhaps, but vastly less reliable and utterly despised by pretty much everyone at DEC. Also very much slower. I heard that the VMS DECtape driver was by Andy Goldstein. The report also mentioned that it supposedly did "overlapped seek", just as the TOPS-10 driver does, but unlike PDP-11 DECtape drivers. I never saw a system that actually had one, unfortunately. paul

6 years, 1 month

Two Kaypro 2 Computers, Disks, Documents

by stephen.m.pereira.sr＠gmail.com

I have two Kaypro 2 computers, some disks and some documents that I?d like to sell. $250 OBO takes the entire lot.. One of the computers worked the last time I set it up and tried it - a few years ago. The other one had some problem with the disk drives and did not boot, IIRC. If anyone is interested, they are available for local pickup or reasonable drive to a meeting point. I?m in Bedford, NH, just west of Manchester, NH. smp - - - Stephen Pereira Bedford, NH 03110 KB1SXE

6 years, 1 month

Wire list for the RKV11-D Qbus RK05 controller backplane anywhere?

by steven＠malikoff.com

Would anyone know whether there is a backplane wire list diagram anywhere for the RKV11-D Qbus RK05 controller like the one on eBay a few days ago? I didn't get that one but I have a pair of NOS H803 4x dual-height socket blocks kicking around that I guess could be wire wrapped into a replica RKV11 backplane as a rainy day project, not that I have the special module that replaced one of the Unibus boards but I'll keep looking. Info on this controller seems pretty scarce apart from the description in one of the handbooks. Thanks for any help, Steve.

6 years, 1 month

Previous message: Wire list for the RKV11-D Qbus RK05 controller backplane anywhere?

by jnc＠mercury.lcs.mit.edu

> From: Jay Jaeger > Yeah, info does seem to be scarce. Not even in my LEVAX fiche set. My fiche set has the Technical Manual, and also (in the wirelist section) the wirelist. Not sure how to get it to you, though. I stuck it in my industrial-grade scanner at its highest resolution; no go. I suppose I could take photos of it displayed on my fiche reader? Or is there some device I can buy which is less than a zillion dollars which can scan fiche? There are a number of things in my set (e.g. the BA11-N Tech Manual) which aren't online, and would be useful to have. > That fourth card (M7268) is apparently a connector card for the Q-Bus > and drive bus. Yes, but actually there are 6 cards: the M7269 is a dual card which goes into the QBUS backplane, and the M993-YA which goes into the first RK05, to convert from the two flat cables which come from the M7268. > From: Al Kossow > Also, it is only 18 bits. Actually, only 16-bit DMA addresses, I'm pretty sure. Noel

6 years, 2 months

Croemeco 4FDC daughter board...

by wh.sudbrink＠verizon.net

Interesting daughter board on the 4FDC in this ebay lot: https://www.ebay.com/itm/Vintage-Lot-of-2-Cromemco-S-100-Boards-Z80-ZPU-CPU- 4FDC-Floppy-Disk-Controller/202903187221?hash=item2f3df8ef15:g:kGQAAOSwhKZeQ z9C (sorry if you have to paste the URL back together) I thought maybe it was the JVB FDCX4 but after looking at some pictures, it clearly is not. Looks like it just adds a data separator to the 1771? Anybody have one of these? Bill S.

6 years, 2 months

Two Kaypro 2 Computers, Disks, Documents

by stephen.m.pereira.sr＠gmail.com

6 years, 2 months

Fwd: Book on punched cards

by phil＠ultimate.com

As seen on PDP-8 Lovers list: > From: "Jones, Douglas W" <douglas-w-jones at uiowa.edu> > To: PDP8-Lovers <PDP8-Lovers at dbit.com> > Subject: [PDP8-Lovers] Book on punched cards > > A new book has come out that I helped create: > Print Punch > published by CentreCentre, London > 40 pounds sterling for the special edition (print run, 100 books) > 30 pounds sterling for the regular edition (print run, 700 books) > > Here is the publisher's book list: > -- https://centrecentre.co.uk/collections/frontpage > > The book includes 178 images of punched cards from my collection, mostly featuring corporate logos or business forms from around the world. The expensive special edition differs from the regular edition only in: A different color of cover, the addition of a big fat rubber band, and the inclusion of an actual punched card from my stock of spare cards. > > The IBM archives also provided lots of content and there are some essays by others. It's a nice coffee table book, and a good way for me to make the content of my punched card collection more widely available. > > It definitely counts as an art book, not a technical reference, but still, it seems at least tangentially relevant here. > > Doug Jones > jones at cs.uiowa.edu > > PS: They paid me, if you can call it that, with a few copies of the regular edition. I don't expect any royalty checks as a result of the astounding sales bump this e-mail will certainly produce as people rush to buy a useless but pretty book. > > PPS: Yes, if you really want to, you may forward this e-mail anywhere you want. Don't bother asking my permission.

6 years, 2 months

Opening a MicroVAX 2000

by a.carlini＠ntlworld.com

I'm trying to non-destructively open up a MicroVAX 2000. I've removed the bottom "dressing" section (which holds some of the I/O connectors)? but the next step isn't obvious. None of the manuals I have cover dismantling and the net doesn't have an IPB or similar available. Other people have managed to get inside (I can see their results) so I must be missing something obvious ... Thanks. Antonio -- Antonio Carlini antonio at acarlini.com

6 years, 2 months

IBM Type 31 Alphabetical Duplicating Keypunch available, Seattle area

by derschjo＠gmail.com

(resending as this appears to have gotten eaten last time...) Hi all -- As the subject line says I've got an IBM Type 31 Alphabetical Duplicating Keypunch sitting in my basement, in the Seattle area. It's in well-loved but decent physical condition and appears to be completely original. I have not powered it on (still has the original selenium rectifiers in it, for one thing) but mechanically it seems fine. No rust or obviously damaged parts, but it's clearly gotten a decent amount of use since the 1930s. It's really cool but it's not really something I'm interested in keeping -- if any of you are interested or know someone who is interested, please feel free to make an offer. Due to the size and fragility of the item I don't want to ship this thing. Pictures are available here: https://1drv.ms/u/s!Aqb36sqnCIfMo9BhHMhAok3F4cAInQ?e=EhXDPP Thanks! Josh

6 years, 2 months

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test-drb February 2020