test-drb January 2009

test-drb@ccmp.vtda.org

218 participants
340 discussions

Stuff available in Cupertino, CA -- Free for local pickup, or make offer

by wmaddox＠pacbell.net

I am cleaning house and have the following available to a good home. All are free if you can pick up locally in Cupertino, CA. Otherwise, if you make a decent offer I'll ship the smaller items. I'm looking to clear out some stuff quickly. * Northstar Horizon chassis and power supply, with backplane * Atari 520ST gear (2 system units, power supply, monitor) * Keyboards for TI99/A, Coleco Adam, Atari 1200XL * Sun/Sony GDM-20E220 Trinitron CRT monitor * Perkin-Elmer "Owl" terminal (fixer-upper or parts) While perhaps a bit off-topic, I also have the following available: * ePods internet appliances (slate-style with stylus, runs Windows CE) * I-Opener internet appliances (desktop with integral LCD, hack to run Windows or Linux) * Webpal internet appliances (ARM-based, VGA, hack to run Linux) * Barometric pressure transducer assembly, e.g., for digital weather station I have posted more detailed descriptions at www.harlie.org/stuff.html --Bill

15 years, 11 months

Hitachi DK-815 SMD drives

by bob＠jfcl.com

Does anyone have any information on using the control panel and internal diagnostics on these drives? I have a couple that I'd like to be able to test out w/o hooking them up to a controller. The DK-815s were fairly common 8" SMD drives on Sun server systems of the Sun-3 vintage. Bitsavers and manx both appear to have nothing on them. Thanks, Bob

15 years, 11 months

Russian PDP11 CPU chips on ebay...

by gordonjcp＠gjcp.net

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=12036621970 Two things I wonder about: How many has he got, and how hard would it be to make an SBC-6120-alike for the -11 with that? Gordon

15 years, 11 months

Wanted: DEC Computer Lab manuals

by quapla＠xs4all.nl

I'm also interested in a scanned or Xerox copied version, as I also bought one of those Computer Lab's. It still has to arrive, overseas shipping takes sometimes longer than one hopes. > Hi, All, > > I was one of the ones lucky enough to get one of the DEC Computer Labs > on ePay last month. Mine finally showed up, and after a quick > inspection, I'm ready to make some cables and hook up some circuits. ---snip--- > So are there scans of the student and teacher's manuals for the > Computer Lab anywhere, and does anyone have a list (including in one > of the manuals) of the normal inventory of jumper leads? > > Oh... one more thing... does anyone have any idea which bi-pin bulbs > DEC used on this? I didn 't tear mine apart far enough tonight to get > bulb details. > > Thanks, > > -ethan >

15 years, 11 months

PRO-380 (was: Russian PDP11 CPU chips on ebay...)

by bqt＠softjar.se

Paul Koning <Paul_Koning at Dell.com> wrote: >>>>>> >>>>> "emu" == emu <emu at e-bbes.com> writes: > > emu> Quoting Gordon JC Pearce MM3YEQ <gordonjcp at gjcp.net>: > >> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=12036621970 > >> > >> Two things I wonder about: How many has he got, and how hard would > >> it be to make an SBC-6120-alike for the -11 with that? > > emu> What's wrong with the original J11's ? I think they look even > emu> nicer than the black ones ... > > emu> And then you could make something like a PRO-385 ;-) > > Wouldn't it be a PRO-380? Well, unless you can clock it at 20 MHz > which was the original plan for the 380, but the J-11 failed to > deliver so they ended up at 10. I think he might have meant PRO-385 as an improvement on the PRO-380...? :-) However, the J11 originally didn't deliver the planned 20 MHz, but it sure delivered more than 10 MHz. The reason the PRO-380 stayed at 10 MHz anyway was because the support chips DEC used for the PRO couldn't handle higher speeds. So even though the J11 could deliver atleast 15 MHz (which is what the 11/53 and 11/73 uses) and probably 18 MHz (which is what later 11/73 and the 11/8x use), the PRO (unfortunately) stopped at 10 MHz (which you can't blame on the J11). Even worse (I think) is that P/OS never supported split I/D space, nor supervisor mode, so the PRO makes very little use of the J11 cpu. (The 11/9x machines eventually used 20 MHz J11 cpus.) > Note that making a PRO-38x means you have to reverse engineer the I/O > control gate array and the video hardware, both of which are likely to > be serious exercises in masochism. (Why reverse engineer the most > bone-headed I/O design in the history of DEC?) Either that, or a lot > of discrete parts to make a PRO-350 clone. I couldn't agree more. :-) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

15 years, 11 months

Wall warts

by technobug＠comcast.net

Message: 26 Date: Tue, 20 Jan 2009 22:01:00 +0000 (GMT) From: ard at p850ug1.demon.co.uk (Tony Duell) Subject: Re: Wall warts; was: hams on classiccmp To: cctalk at classiccmp.org Message-ID: <m1LPOef-000J3QC at p850ug1> Content-Type: text/plain Tony Duell wrote: > I feel these standard, or at least the 'CE mark' is part of the > problem, > and here's why.... > > It would apperar there are either loopholes in the standard, or > plenty of > cheap electrical devices (including wall-warts) that have invalid CE > marks on them, in that I've seem enough devices that I don't consider > safe. The problem is that if the wall-wart carries the CE mark, then > as > you said, the certification for the whole product becomes a lot > easier, > and if there are any problems later, a large part of the defence is > 'But > the wall wart met the appropriate CE standards'. Specifically, what do you consider unsafe about current wall-warts? I've found all the devices I've been in of late to be well designed and quite safe - cheap, yes. Perhaps you have been expecting accessible fuses. For some time the fuses have been located next to the core under the windings and act both as current and thermal protection devices. Most of the ones I've opened up have both the primary and secondary fused. I have yet to find one with the turns actually fused open. Granted, it's a bit more work to repair one, but well worth the time it takes to unwind the primary and secondary, replace the fuses, and rewind same. ;=) > But when manufacturers were entirely responsible for what their > devices > did, they made darn sure they were safe. Said manufacturers did not > want > to end up paying out large amounts of damages. SO th products really > _were_ safe. And in so many cases the manufacturer's concept of what was safe was not that of the court. Consequently, the certification standards. > I offer as an example the PSU brick for the Philips G7000 video game. > It's a bit like awall-wart, except it has a mains input cable that you > wire to a suitale plug. But inside that brick (which is nicely screwed > together), there are no fewer than 3 protective devices. A mains-side > fuse, a secondary fuse, and a thermal fuse (on the mains side). And the reason the warts are now sealed is that some bright person, having no idea of what he/she/it was doing, opened one and (chose one) 1. set it ablaze, 2. caused some sort of laceration on a sharp edge, or 3. left it open and plugged in and fried fido. We now have a mentality that disallows Darwinism and hence the large number of people developing standards to guide and protect the designer/ manufacturer. Again, what you might consider safe might not be what others consider safe. CRC

15 years, 11 months

FS: Psion II LZ Organizer

by silent700＠gmail.com

I believe this qualifies, more or less, as a computer, and is definitely over 10 years old: http://www.bioeddie.co.uk/models/psion-ll-organiser-lz.htm I have the main unit, which I've tested and appears to work fine, a number of ROM and RAM carts, and a bunch of books. Asking $50, including shipping in the Lower 48. International pays for shipping (sorry.)

15 years, 11 months

SB11

by fsmith＠ladylinux.com

On Wednesday 21 January 2009 12:09:50 Gordon JC Pearce MM3YEQ wrote: > I'd build a little dinky PDP11 in it, with an added-on LTC as described > above so I could run TSX+. ?I kind of miss my PDP11, and I'd like to get > another (smaller) one. Yah I want to do this. But the power in this lil guy seems to not be up to snuff enough to power a decent setup. That is from reading some mailing list posts about it from a lil googling and help here. -- Kindest Regards, No Problems Only Solutions Hosting Admins Baltimore, Maryland

15 years, 11 months

SB 11

by fsmith＠ladylinux.com

On Wednesday 21 January 2009 12:09:50 Glen Slick wrote: > I have one of the same VT100 boxes in its original configuration, > which is without any CRT and with a full metal skin around it with a > handle on top making it somewhat like a giant lunchbox. Ohhh that sounds neat .. do you have any pictures of it that you could share ??? > The "keyboard interface box" video output feeds into the VS11 where > the terminal video output is then fed back out along with the VS11 > raster graphics output to the monitor. > > The VS11 is the M7061-YA / M7062 / M7064 Q-BUS board set. I have a VS11 here. Maybe a couple of them. This is interesting thank you. -- Kindest Regards, No Problems Only Solutions Hosting Admins Baltimore, Maryland

15 years, 11 months

SB 11

by fsmith＠ladylinux.com

On Wednesday 21 January 2009 21:14:32 Dave McGuire wrote: > Grrrrr. That is a fairly rare box. > > An LTC signal can be generated trivially with a tiny board that > can be buried inside the chassis. > > -Dave :-) .. I was just musing is all. I WOULD never do anything to compromise the originality of the unit in question. -- Kindest Regards, No Problems Only Solutions Hosting Admins Baltimore, Maryland

15 years, 11 months

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test-drb January 2009