test-drb February 2004

test-drb@ccmp.vtda.org

275 participants
504 discussions

AMSTRAD PCW8256 systems avaialble in Tuscon, Arizona

by vcf＠siconic.com

See below. It's a very terse exchange. Basically, an Amstrad PCW8256 is available in Tuscon. Go get it. Leave me out of it. Reply-to: jvansickler(a)cox.net ---------- Forwarded message ---------- Date: Fri, 3 Oct 2003 18:45:39 -0400 From: jvansickler(a)cox.net To: Vintage Computer Festival <vcf(a)siconic.com> Subject: Re: Re: AMSTRAD PCW8256 systems & sw available Tucson, Arizona > > From: Vintage Computer Festival <vcf(a)siconic.com> > Date: 2003/10/03 Fri AM 01:19:21 EDT > To: <jvansickler(a)cox.net> > Subject: Re: AMSTRAD PCW8256 systems & sw available > > On Fri, 3 Oct 2003 jvansickler(a)cox.net wrote: > > > Let me know if you're interested. > > Hi Jim. > > Where are they located? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

21 years, 2 months

'melted' tape roller

by vp＠mcs.drexel.edu

> > lot firmer), if you happen to have the liquid nitrogen.... > I didn't have any the last time I looked :) You should have come to the hacker's conference at Yosemite; somebody brought a 4 ft tall flask of liquid nitrogen for demos, but we also used some of it to make instant ice cream (excellent!). **vp

21 years, 2 months

Bendix G-15

by Van.Snyder＠jpl.nasa.gov

A correspondent claims that you have a complete set of Bendix G-15 manuals. Have you scanned them? Do you have any that Paul Pierce doesn't have (see http://www.piercefuller.com/collect/bendix/index.html)? Are you willing to lend them to have them scanned? Best regards, Van Snyder

21 years, 2 months

M7891-DC 2a fuse on +12? fixed!

by technobug＠comcast.net

On Thu, 05 Feb 2004 12:11:19 -0500 Brad Parker <brad(a)heeltoe.com> pounded out: [............] > Do old electrolytic's short out? The MS11 parts list just say "AL EL" > which I assume is aluminum electrolytic. For some reason I was > thinking > it would be a tantalum (based on it's silvery look) but now I'm > thinking > not. I think I'll replace it with a nice axial lead tantalum. If you are going to use the equipment only occasionally, a tantalum cap is an excellent choice. However, with the current reliability of electrolytic caps, the added expense is something that has to be considered. > I know sometimes badly mfg'd electrolytics will leak, but I've never > seen a dead short - but my expeience is mostly with *new* products, no > ones that are so "experienced" as this one :-) With old equipment, especially those items that have been in storage a long time, an electrolytic will depolarize. When you hit the ON button, the dielectric layer is missing and the conduction can cause a short, or occasionally, a small bang as the cap and its contents scatter around the chassis. Leakage is generally due to badly formed dielectric layers. In a pinch, you can cure a leaky cap by applying voltage of reverse polarity of about 10% of the rating for several seconds and then bringing the cap slowly up to its rated value to reform the dielectric. To safely re-energize a piece of equipment that is long in the tooth and has been sitting around for some time, you have to bring the voltage up relatively slowly to allow the electrolytic caps to re-polarize. Everyone who is collecting should own a good-sized Variac. You power the box up by bringing the voltage from naught to the operational level with the Variac over a period of about a second or so. This should allow the input caps (biggest and most expensive) to re-polarize without taking out the fuze, or worse, the rectifier. Even with switchers, this will also have a ripple effect throughout the system unless the unit has power management. I have some 50 y/o stuff around here that continues to work without repair by taking the above precautions. In your case, I would replace all the bypass caps on the board if you have had a failure in one - although good, they are probably marginal at this point in time. When replacing electrolytics, I typically go for the 105 degree items if they will fit (the current versions are substantially smaller than their predecessors), or for higher voltage beasties with the same temp rating. I also add heat protectors to caps that have been sited next to power resistors or large, silicon embers (monitors are notorious in this regard). Heat will take out an electrolytic faster than anything else. > Normally I wouldn't post this sort of thing but I figured someone else > might find it interesting/amusing. > Only if it doesn't happen to me... > -brad

21 years, 2 months

Looking for HDOS diskette layout

by dwight.elvey＠amd.com

Hi Tom Nope. HDOS is a completely different OS. As I recall, the directory is somplace in the middle of the disk. Dwight >From: "Tom Jennings" <tomj(a)wps.com> > >On Wed, 2004-02-04 at 08:21, Marvin Johnston wrote: > >> Does anyone know or have a reference regarding the >> layout of the HDOS (H8/H19) diskette and filesystem? >> The generic HDOS documentation doesn't include it. > >Isn't it just CP/M 1.4? > >

21 years, 2 months

Greedy E-bay idiots!

by SUPRDAVE＠aol.com

There is discussion on some of the ebay community boards about this. A lot of the power sellers try to justify it various ways. As for myself, I always begin my descriptions with a big line that mentions actual shipping charges only and no excessive fees. Whether or not that helps remains to be seen. I have bypassed many an auction because the shipping and bogus handling fees were not acceptable for the item sold. In a message dated 2/5/2004 5:00:20 PM Eastern Standard Time, teoz(a)neo.rr.com writes: > Did you guys see this? > <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2592518771&category=4504 > 5>. It's a thin manual for an EPROM programmer. This clown wants $9.80 for > shipping AND $2.80 for insurance (REQUIRED no less). Actual postage for > this via USPS bookrate is about 40 cents and insurance is 35 cents! How do > these clowns expect to stay in business! > > Joe

21 years, 2 months

DECnet/E and DECnet-Plus

by bqt＠update.uu.se

On Thu, 5 Feb 2004 meltie <lists(a)microvax.org> wrote: > > > FWIW, there's an implementation of the "old" network terminal protocol > > > in the DECnet/Linux kit; with some hacking you can probably port that > > > and use it to talk to DECnet/E that way. > > > > The DECnet/Linux implementation is so bad that I'd say it's unusable. > > (Atleast when I tested to/from an RSX system.) > > I've had no trouble with it using it to communicate with VAX/VMS. The > author of most of it on the other hand..! I wonder how much things you've tried... I know that the people developing DECnet/Linux have used a VMS system to communicate with to test things, but I had some problems even to that. Trying to communicate with RSX was totally useless. Basically nothing works. The only thing I managed to get to work was DAP access from the Linux system to the RSX system for transferring files from RSX to Linux. All other things with DAP fails. PHONE didn't work either. Hmm, what else is there... Ah, yes, CTERM didn't seem to work either. [...] > From: Paul Koning <pkoning(a)equallogic.com> > > Johnny> On Wed, 4 Feb 2004 Paul Koning <pkoning(a)equallogic.com> > Johnny> wrote: > >> 1. DECnet/E only supports the "old" network terminal protocol, > >> which is object 21. The other one is "CTERM" which is implemented > >> by VMS and one or two other operating systems, but not DECnet/E. > >> In fact, I think none of the PDP11s do it; it's way too complex. > > Johnny> RSX definitely implements CTERM. I think it's object 23. > > Object 23 is the old RMTERM protocol. CTERM is 42. Ah. Sorry. I looked at the known objects of my RSX system, and had to pick between 23 and 42, I picked the wrong one. :-/ 23 is handled by RMHACP and 42 by RTH. I knew both were interactive terminal protocols, but I had a hard time remembering which was which. > >> 2. DECnet/E works fine on E11. It's been a while since I've tried > >> that but I did use it, under Linux that is. I was using the "tap" > >> pseudo-ethernet to debug DECnet/Linux against DECnet/E... > >> > >> FWIW, there's an implementation of the "old" network terminal > >> protocol in the DECnet/Linux kit; with some hacking you can > >> probably port that and use it to talk to DECnet/E that way. > > Johnny> The DECnet/Linux implementation is so bad that I'd say it's > Johnny> unusable. (Atleast when I tested to/from an RSX system.) > > Unuseable for what? I didn't use it with RSX, but it works fine with > RSTS. That include rmterm... (I added that for RSTS and TOPS/20 but > not for RSX; maybe someone else has by now, if not I expect volunteers > would be welcomed...) Well, like I said before. Access from RSX to Linux don't work at all. Access from Linux to RSX works for reading files, but not writing. PHONE don't work, and CTERM didn't work if I remember correctly (I'm a bit unsure about CTERM, since it's been a few months since we disabled DECnet/Linux again). Also, PHONE with VMS systems don't work as they should either. I can't remember if I tried that much with DAP, but even if it works better there must obviously be some serious bugs in there since it fails so abmyssaly with RSX. Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

21 years, 2 months

More eBay madness: $2000 Otrona Attache

by r_a_feldman＠hotmail.com

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3457767314&category=177 No bids yet, so you can Buy It Now for only $3200 (cheap at half the price). Bob _________________________________________________________________ Find high-speed ‘net deals — comparison-shop your local providers here. https://broadband.msn.com

21 years, 2 months

This just in - Commodore B128 low profile computer (NOT 128D)

by Degnan＠degnanco.net

With the help of Ed Shockley and his web site insectria.net I was able to get a very trashed B128 machine up and running correctly. He's the expert with the B128 and his site can answer most questions. Direct Link: http://personalpages.bellsouth.net/d/r/drshock/b128.html Bill >Message: 28 >Date: Wed, 4 Feb 2004 23:35:13 -0800 (PST) >From: steven <tosteve(a)yahoo.com> >Subject: This just in - Commodore B128 low profile computer (NOT 128D) >To: cctalk(a)classiccmp.org >Message-ID: <20040205073513.81782.qmail(a)web40902.mail.yahoo.com> >Content-Type: text/plain; charset=us-ascii > >Don't know much about it yet, but it sure is pretty! >Seems to work fine. > >It came out the same time as the C-64, supposed to >replace the PET and be their business computer, but >didn't sell well, I guess.

21 years, 2 months

5.25 disks/programs available

by SUPRDAVE＠aol.com

they were spoken for just before you emailed me

21 years, 2 months

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test-drb February 2004