test-drb September 2004

test-drb@ccmp.vtda.org

268 participants
648 discussions

Wanted (To Buy Or Trade) Laptop RAM and Laptop hard Drive

by gsutton9503＠wavecable.com

Anyone here got a spare laptop hard drive (2-4GB) and / or a pair of 16MB 72-Pin Laptop DIMMs they might be willing to sell or trade away? I have an old TI Extensa 450 that I've been tinkering with, set up with both Damn Small Linux and Doss 6.22/WfW 3.11. Since she is dual boot, drive space is getting pretty tight (540MB hard drive, with 150MB of that dedicated to DOS, 64MB for the Linux swap partition, and the rest a single Linux ext2 partition). I really need to get a larger hard drive. I tend to avoid shopping eBay for computer parts, primarily because most sellers for this stuff like to severely gouge on shipping. And, I have not been able to find what I need locally. As for the RAM, I definitely need a pair of 72-Pin 16MB laptop DIMMs, which would max out the system's memory. She currently only has 12MB, in the form of an 8MB and a 4MB DIMM. So, if anyone has any of these items available for a reasonable price, please send an email my way. I am also willing to do some trading instead. Currently, I have available for trade, a Databook PCMCIA card reader. It has 2 16 Bit card slots, fits in a 3.5" drive bay, and comes with its 16-Bit ISA controller card and controller cable. I know I can probably dig up other old computer bits to trade off as well. I can also trade a couple of Google GMail invites.

20 years, 3 months

Onyx C8000: good news and bad news as well

by cheri-post＠web.de

Hello guys, it's been a while I told you about this lovely machine. Someone told me to backup the contents of the PROMs and EPROMs: that's done. The capstan roller of the DEI - streamer is fixed (I changed it), the power supply is in working condition, the voltages are fine. Now the bad news: The IMI 7020 hard drive is dead and cannot be fixed: The damn coil of the motor causes a short circuit :( That's why the power supply turns off when the disk drive is attached... Even if somebody had a replacement motor (24V) , who could probably ajust the platters and the heads to find track 0 ?? I've never seen another IMI drive, they seem pretty special, with their connectors and all. Ok, anyway, I'll concentrate in bringing the machine back to life without a hard drive but I haven't been very lucky yet. Al asked me to scan in the boards, but my scanner (low cost, low end) has problems with depth perception, you can barely see something on the images. I'll have to find another scanner which can do the job. So far, nothing appears on the console terminal when turning the machine on. The voltages on the test points have been checked, there're ok. sometimes, the 5V voltage test point "shows" 4.2 V on the board this the terminal connectors but this semms to be a problem of conductivity. An important question: The (10 or something) SRAM-modules on the CPU-board which are Motorola MCM2125AC-70 chips reach a high temperature. 15 minutes after turning on the machine, the measured temperature comes to 50 ?C (122?F), the chips been supplied with typical 5V (measured). Is this normal ? It's a bit to high, isn't it ? By the way: Last time, I had the wrong model number in mind: C8002. Actually, it's a C8000, sorry for that. Sincerely yours ! Pierre ________________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt neu bei WEB.DE FreeMail: http://freemail.web.de/?mc=021193

20 years, 3 months

Odd PET 8032 mainboard

by dave04a＠dunfield.com

Hi Guys, Continuing to play with PET's ... So far, all the PET 8032s I've seen (including my SuperPET) use a board which is identical to the 4032 board, except that the 4032 has some buffers and RAM unpopulated (the locations are there), has the jumpers by the video circuitry set differently, and has a different EDIT ROM - I assume this is the "universal" board that they talk about on funet. I recently was given a dead 8032 board (which I have fixed - bad 7805 and also a bad 2114 video RAM - ***another one***). This board is different - it does not have the jumpers near the video circuitry, and the monitor connection is located near the keyboard connector (on the other board the monitor connection is near the edge at the front of the machine). Since there are no jumpers, this board does not appear to be usable at 40 columns. Another odd thing about this board, is that all DRAMs, ROMs, and 40 pin 65xx chips are factory socketed - my other boards had only EDIT rom and 6502 socketed (a few more have been since I repaired them). Aside from the sockets, lack of jumpers and moved video connector, it looks nearly identical to the other board. What board is this? Is this the "early 8032" board that is mentioned on funet? Both boards say "Copyright 1080". Is it electrically different from a "universal" board that is configured for 80 columns? Regards, Dave-- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html

20 years, 3 months

Identifying old HP iron

by mail＠g-lenerz.de

Hello, I've got an old HP system that I rescued from ebay. I've asked in german newsgroups but that and googling did turn up next to nothing. It's a beige machine of the stackable kind and I think I've seen Series 300 machines with Motorola CPUs in a similar enclosure. What I've got along with some HP-IB cables and a 700/92 HP terminal is: * 7957 Harddisk. This spins up and the light on the front turns green. * 9144 Tape Drive. I get some status codes on the display on the back but as long as I don't get the system up that doesn't matter very much I guess. * The main unit is labelled "HP Series 40 260" on the front. It seems to have a 5 slot backplane of some kind. 2 Slots ar occupied by the mainboard which has little else than two serial connectors. Then there is a HP-IB interface and a serial card with 3 "normal" ports and a fourth that looks somewhat like the DIN headphone connectors on audio equipment. The uppermost (fifth) slot is empty. There is a small info card in the back that informs me that the system is model "45072A". So what is this? Is this a "260" as in "successor to the 250"? The first followup question to that would be asking what the appropriate terminal settings are for connecting to that iron. I do get something on "PORT-1" of the main logic board, but no setting (from 9600 8N1 to obscure guesses as 1200 6N2) nothing yields useable results. Gerhard

20 years, 3 months

Dead IMI-drive (was Re: Onyx C8000: good news and bad news as well)

by cheri-post＠web.de

> >The IMI 7020 hard drive is dead and cannot be fixed: > >The damn coil of the motor causes a short circuit :( > > I'm sure you checked, but possibly could it be motor braking electronics or > the good old reversed diode across the windings that have shorted, and not > the motor coil itself? This reversed diode sits on a small PCB outside the motor. I disconnected it, having the two wires of the 24V DC Motor in my hands. There's almost no measurable resistor between these wires... this leads me to the assumption that the coil produces a short circuit. Connecting the motor wires directly to the 24V connectors of the power supply leads to a shutdown when beeing turned on. I've got lots of hard drives (approx. 350) in any size and age you can imagine but I've never seen one with a dead motor which causes a short circuit. It's quite rare, isn't it ? Pierre _________________________________________________________ Mit WEB.DE FreePhone? mit h?chster Qualit?t ab 0 Ct./Min. weltweit telefonieren! http://freephone.web.de/?mc=021201

20 years, 3 months

Un-Acclaimed...

by news＠computercollector.com

I just saw a Sept. 1 post on FuckedCompany.com: >>> Rumor has it after 17 years of making video games, Acclaim just filed Chapter 7 bankruptcy and laid off all 600 employees. <<< - Evan K.

20 years, 3 months

Software Free for postage

by millenniumfalcon＠cableone.net

I have a two disk set (5 1/4" floppies) of "The Deluxe Computer Edition SCRABBLE" these are originals, not copies. I don't know if they are good or not. I don't even have a working 5 1/4" floppy to test them on. But for postage they go to the first one who wants them. ($3.58 will cover Priority Mail anywhere in the lower 48)

20 years, 3 months

Intellec power cord

by JMeyer101＠aol.com

Jack, Thanks for the info on the power cords. I looked up the two cords and they both look very close. I will contact Newark on Monday to verify the distance between pins. The 17952 has a note that states it is made with non-standard polarization. Do you or anyone else on cctech know how I can tell if it's the correct polarity for the Intellec? The 17280's notes state that the polarity is as mandated by CSA electrical bulletin 895b. Anyone know what that means? I'd hate to plug in the cord and fry my machine. Thanks, Jeff

20 years, 3 months

Floppy drives for the Tarbell floppy controller

by Watzman＠neo.rr.com

Which Tarbell Controller? There were 4 revisions of the single density board, A thru D, and way too many revisions of the double density board (A thru H, but A thru D did not work reliably; the revision "E" board was really the first version of the double density board that was reliable). The single density Tarbell board was a mess, it wasn't much more than a disk controller "prototype" board, you basically had to jumper-wire the entire board yourself by hand based on the type of drives that you had, it is just awful (typically, you ended up installing something like 50 jumper wires). HOWEVER, if you got the board jumpered right (and, of course, if the parts were all good and if it was assembled right), it actually worked really well. The double density boards ran way to hot, the voltage regulator was way over-stressed, and I always put a low-value 2-watt resistor across the voltage regulator on the back of the board (something like 10 ohms) to relieve a bit of the stress on the regulator. The single density board was an "early" item, before the drive interfaces became relatively standard. Because of the jumper options, it could be modified to take ANY drive. The double density board basically requires either a Shugart type drive (or one very compatible with it), or a Persci drive. There were only a relatively few jumper options. Manuals for both boards are on Howard's site.

20 years, 3 months

Fwd: pdp-11 hardware and documentation - free

by tosteve＠yahoo.com

--- cc(a)w140.com wrote: > Date: Wed, 15 Sep 2004 11:03:51 -0400 (EDT) > From: cc(a)w140.com > To: undisclosed-recipients:; > Subject: pdp-11 hardware and documentation - free > > Dear World, > > We have here at CCNY some hardware and documentation > for a DEC PDP-11/73 > system. If these pieces are not taken in the next > day or two, they will > be discarded. The documentation can wait a little > longer. > > Items: > > - DEC RX-02 dual floppy drive > - Grinnell GMR270 Image Processing System > - Kennedy 9-track tape drive with Western Peripheral > interface > > Please email me soon at cc(a)w140.com if you are > interested. The items > are free. CCNY is in /USA/NYC/Harlem. thanks, > -kurt > > PS: I will be posting another message soon with a > list of the manuals > that we are giving away as well. > __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail

20 years, 3 months

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test-drb September 2004