test-drb May 2009

test-drb@ccmp.vtda.org

204 participants
322 discussions

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What is this computer

by vax9000＠gmail.com

Does it ring a bell?

15 years, 7 months

e: Looking for Mac Color Classic motherboard

by trag＠io.com

> Date: Sat, 16 May 2009 22:26:55 -0700 > From: Josh Dersch <derschjo at mail.msu.edu> > It's not battery corrosion -- the board is literally rusted, all over > :). The battery's nasty too, but that's only a small part of what's > wrong with it. I suppose I can soak it in something, maybe scrub it > with a toothbrush and see if that helps at all, but it's pretty bad. > > As Cameron pointed out, there are other boards that will work with some > modification, I'll keep my eyes out for those as well... You might also post a WTB on the Trading Post forum of 68kmla.net. That's where many of the die-hard 68K preservers hang out. Jeff Walther

15 years, 7 months

IMSAI 8080 for sale....

by imsaicollector＠yahoo.com

Lol!!! I just checked e-bay for what is being asked of an IMSAI-8080 that is not fully tested, no floppy drives and from what I can tell only has one board http://cgi.ebay.com/Vintage-IMSAI-8080-S100-Low-S-003878-NEC-8080A-Works_W0… They are asking near $4000.00 So whomever takes my offer will be getting a gem for of a system at a bargain price of $2000.00 Anyway you have until Wednesday morning until I place it on e-bay. Later people.. Michael Hart Trader Kiosk 201-290-3796 michael at traderkiosk.com imsaicollector at yahoo.com I, the unwilling, was led by the unqualified, to do the unbelievable for so long with so little, that I attempted the impossible with nothing......" --- On Mon, 5/18/09, Michael Hart <imsaicollector at yahoo.com> wrote: From: Michael Hart <imsaicollector at yahoo.com> Subject: IMSAI 8080 for sale.... To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Date: Monday, May 18, 2009, 3:00 PM Hi all ?? Those of you who know me, know that I have a rule that basically make me attempt to get rid of stuff that I have not used after a certain period of time. ?? I have a second fully functional IMSAI-8080 (http://www.michael-george-hart.com/computerscience/imsai8080-z80.html) that has been sitting around doing nothing since completed my last IMSAI-8080 project (http://www.michael-george-hart.com/computerscience/imsai8080-8088.html) ?? Given my other S-100 projects, ALTAIR 8800b repair and restoration, and porting LINUX to my CS-250 I don't foresee really doing anything with this particular IMSAI-8080 for at least another year to two years maybe as much as three years from now. ?? I have had this IMSAI-8080 since 1996/1997, which I got from a Electronic parts/component store. The store used it to maintain their inventory along, mail, billing etc from about 1975/1976 until it simply stopped working. (That was the story told to me.) It sat in their store from the day it stopped working until I came across it in 1996/1997. I made some simple repairs to the memory and its been working since that time. ?? The only issue with it is there are some minor alignment problems with the between the floppy drives. Other than that the system has always booted without issue. ?? The person who purchase the system from me will get all the manuals for all the boards in the system and the floppy drives. Also to be included is the IMSAI-8080 Manual and a number of IMSAI-8080 period related fliers. I will be sending the 50 or so floppies that originally came with the system when I first took possession of it . ? Again this is a fully functional IMSAI-8080 in near mint condition. http://www.michael-george-hart.com/image/s-100/imsai-1/dsc02565.jpg http://www.michael-george-hart.com/image/s-100/imsai-1/dsc02567.jpg http://www.michael-george-hart.com/image/s-100/imsai-1/dsc02572.jpg I am looking to get $2000. If no one is interested I will put it on e-bay and see what the market tolerate. I think that my price is a good deal consider the crap that I see people paying $1600 to $2500 on e-bay for systems that don't even work or can boot into CP/M-80 I intend to place the system on e-bay Wednesday morning is no one here gives a my expected price. Let me know if you are interested Michael Michael Hart 201-290-3796 michael.george.hart at gmail.com PS. ?? The total weight is about 100lbs. I will probably have to ship everything I mentioned above in 5 different boxes. You pay for shipping cost. If possible I would prefer whomever purchases the system come an pick it up the system so they can confirm the functionality to their satisfaction for themselves. I still don't trust UPS/FedEx or USPS for safely get the system no matter how well I pack the system.

15 years, 7 months

IMSAI 8080 for sale....

by imsaicollector＠yahoo.com

I would agree if all you wanted to do was toggle the front panel switches. --- On Mon, 5/18/09, Golan Klinger <gklinger at gmail.com> wrote: From: Golan Klinger <gklinger at gmail.com> Subject: Re: IMSAI 8080 for sale.... To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Date: Monday, May 18, 2009, 6:41 PM http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180357914217 Looks like that one was a steal. -- Golan Klinger <gklinger at gmail.com> Dark is the suede that mows like a harvest.

15 years, 7 months

request information about your RF35/RZ35 hard disks

by superedgarvm＠gmail.com

Greetings: I have just read this announce you have posted some time ago http://www.classiccmp.org/pipermail/cctech/2003-March/012694.html, I know it's very old, but I'm interested to buy one of your hard drives, If you still have them, please contact with me. PD. sorry for typos, my english is not very good.

15 years, 7 months

DEC VT05 with OS/8 -- basic system rebuild?

by djg＠pdp8.net

>I suspect that it is impossible to rebuild OS/8 today. I would be >surprised if OS/8 was actually maintained on a PDP-8. All of the >diagnostic listing, for example, were generated using PAL10 on a PDP-10. > It is possible at least for parts of the OS78V4/DECMate version See sysgen.tx for build information in files below. The BI files in http://www.ibiblio.org/pub/academic/computer-science/history/pdp-8/os8/os78… ftp://ftp.update.uu.se/pub/pdp8/pdp-8/os78/v4/ are batch files to build the system. I used it to build these images http://www.pdp8online.com/images/images/os8/DECmate_I.shtml when people couldn't find DECmate I disks. I never heard back if the disks I made for people actually worked ok. I remember is wasn't quite trouble free but so far I haven't found the disk image I put everything on to build those rx02's. If you have problems email me and I may either remember the problem or find the files I used to build. These instructions/files should help in building earlier versions. David Gesswein http://www.pdp8online.com/ -- Run an old computer with blinkenlights

15 years, 7 months

Where would one use a DEC BC13J?

by ethan.dicks＠gmail.com

All, I have a small pile of NIB DEC BC13J-08 cables with 1997 mfg dates on the bags. They are DB25M w/pins 1-8+20 on one end, and RJ45 on the other. I'm used to DEC MMJ cables, but not DEC RJ45 serial. Does anyone know what these were used for originally? I googled for them, of course, but found little hard info - mostly for-sale listings. Thanks for shedding any light. -ethan

15 years, 7 months

US 3-hole binders

by hamren＠sdu.se

I am seeking to replace floppy low-quality ring binders. Where, preferrably in Europe, can I find good-quality binders: - Standard US 3-hole - "Fork" binders, not ring binders, se image. - With wooden spine, or other rigid type that will not bend or fall over. http://www.sdu.se/computer-automation-museum/pub/gallery/3-hole-binder.jpg /Lars Hamr?n

15 years, 7 months

Nostalgic technologies article

by ethan.dicks＠gmail.com

On Mon, May 18, 2009 at 4:34 PM, Mark Tapley <mtapley at swri.edu> wrote: > Hello all, > ? ? ? ?FYI&D, an article on MSN tech & gadgets describing "25 Computer > products that refused to die". > > http://tech.msn.com/howto/articlepcw.aspx?cp-documentid=19017036&page=1 Nice. > The list is: . . . > Floppy Disks This section asks the question "Under what circumstances would you opt for floppies over something like a $10 (or so) 4GB USB drive that holds 2750 times as much data?" Well... I would when I'm on a machine that doesn't _have_ USB and can't have it equipped (like my Dell Latitude LM that only has PCMCIA, not Cardbus... it's been running RedHat 9 since it was given to me in 2003. With 256MB of RAM and a 40GB disk, it's not a terrible laptop, but I wouldn't try to run a recent browser on it, that's for sure). . . . > Compuserve This section mentions "Wow" and calls it "a faux-AOL that the company shuttered within months of its 1996 release -- I can?t believe that anyone misses it or is looking for it.". I never used Wow, but when I was working at AOL/CompuServe in 2001, I worked directly with some folks who were part of the Wow launch a few years earlier. Their comments were, um, uncharitable. Apparently few people liked it, inside the company or out. I still have a couple of Wow mousepads, the only useful remnant. The article also says "For those of us who were CompuServe users back when its user IDs consisted of lots of digits and a mysterious comma, it?s a depressing fate." I haven't memorized my old PPN, but I do have it in easy reach at home on the subscriber label of ancient copies of "Online" magazine. I'm glad I worked there (twice!), but it was sad to watch the once-great CompuServe in the final stages of digestion by AOL. -ethan

15 years, 7 months

DEC VT05 with OS/8 -- basic system rebuild?

by bqt＠softjar.se

Chris Elmquist <chrise at pobox.com> wrote: > I may have missed some facts earlier in this thread-- but does the system > obey hardware flow control such as CTS? ie, if CTS is low, will it be > blocked from transmitting? If that is obeyed by all of your OS and > software, then it is not hard to build a microcontroller that would sit > between the system and the terminal, adding the delays you need on <cr> > while buffering for and hardware flow controlling back toward the PDP-8. In general, when talking about DEC equipment, the answer to that question is *always* no, for the simple fact that DEC didn't do hardware flow control. Hardware flow control is actually against the RS-232 spec, and DEC didn't abuse standards (unlike most other companies). (And to make it clear: hardware flow control is definitely not possible towards a PDP8) Johnny > Chris > > > On Thursday (05/14/2009 at 03:04AM +0200), Philipp Hachtmann wrote: >> > Hi, >> > >>> >> I completely mis-understood the source of your troubles. >> > Oh. >> > The VT05 terminal operates at speeds from 110 baud to 2400 baud, >> > selectable with a rotary switch in the back (my unit is currently missing >> > a counter ic to generate 110baud, but...). >> > So far so good. The problem is, that when you want to operate the VT05 at >> > speeds higher than 300 baud, you have to wait a certain amount of time >> > after a line feed character or cursor positioning command. This is >> > usually done by inserting zero fill characters (4 at 2400 baud) after the >> > critical commands. If you don't obey this rule, the VT05 has not >> > completed changing the line when you send the next character. This is a >> > bit like a too slow cr on a teletype - funny but true. >> > So my wish was to modify OS/8 so far that it generates those fill characters. >> > The TTY: handler is also capable of correctly doing this for me. But many >> > other programs - as the OS/8 keyboard monitor itself - use direct IO >> > commands to read from and write to the terminal. >> > So one would have to patch many programs. In case of the keyboard >> > monitor, I don't know if there is any room left to put such a code in. >> > And I don't know how to reassemble and correctly install a new keyboard >> > monitor from scratch. >> > So all I can do is to run the VT05 at 300 baud. Or get the advances >> > serial interface (see other posting). >> > Did this illustrate the problem? >> > >> > Best wishes, >> > Philipp :-) >> > >> > >> > >> > -- >> > http://www.hachti.de > > -- Chris Elmquist -- 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, 7 months

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test-drb May 2009