test-drb January 2005

test-drb@ccmp.vtda.org

254 participants
551 discussions

Strange RK03 / RK05 clone with Plessey-controller

by pete＠dunnington.u-net.com

On Jan 18 2005, 17:40, Pierre Gebhardt wrote: > The most interesting thing: A Cipher disk drive Model: SF-1221 with a Plessey controller PN: 703340-101J. > A 50pin cable goes to some sort of Plessey converter, another 50pin cable from the converter to the cipher drive. [ ... ] > Moreover, I found a disk pack which goes with the drive: DEC 2200 BPI-12 > Is this a RK03 or RK05 pack ? AFAIK, an RK03 pack and an RK05 pack are completely interchangeable (someone please correct me if I'm wrong), and certainly have the same capacity and layout. The drives are different; RK03 drives were made by someone else (Diablo, IIRC) and rebadged by DEC, whereas the RK05 drives were actually made by DEC, and have a faster access time. If it helps, that Plessey part number is an RK05 controller. -- Pete Peter Turnbull Network Manager University of York

19 years, 11 months

HP gear available

by jwest＠classiccmp.org

I have a few empty chassis, except PS. I was saving these to try and get a few M series machines up in the shorter chassis, but my M series fixation has been satisfied via government auction so it's time to let these parts go. I'd just throw them in the trash as they are poor condition and mostly just empty chassis, but I hate to do that... (but one NICE part at the end of this list)... 1) HP 2108A cpu chassis. No M/B, just a chassis, power supply (dirty), backplanes, and crossover PCA. The power supply is the A style. Looks like a few boards are missing towards the front of the PS but that may be normal/optional, I'm not up on the A style power supply. Power supply functionality is unknown. This one includes a poor condition known dead 2108A front panel (but all switches are intact and solid). 2) HP 2108A cpu chassis. No M/B, just a chassis, power supply (dirty), backplanes, and crossover PCA. The power supply is the A style, all boards appear present. Power supply functionality is unknown. 3) HP 2108B cpu chassis. No M/B, just a chassis, power supply (known dead - B style), crossover PCA, memory backplane with broken slot, ok I/O backplane. Available immediately for free + shipping or it'll get pitched. Then, depending on which way I go with my dev cabinet as to form factors (2109 vs. 2113), I will have two chassis and power supplies and front panels (2109 or 2113) available to the list. All pristinely restored, cleaned, and tested... power supply scrubbed and refoamed, etc. and 4)... Also, I have one complete HP 21MX M-series machine (2108B) available immediately. That's the more rare M series, not the fairly common E series. It has been perfectly and carefully restored to mint cosmetics and full running condition - tested and completes all diags. I really need some cash to recoup my recent classic computer purchases so I was planning on going to ebay with this. However, I'll consider any unusually interesting trades. More to come! Jay West

19 years, 11 months

Thurlby LA160 Logic analyser

by alan.needham＠HUMBERPOWER.CO.UK

Lee, a full user's manual is at http://www.cirrus.it/pdf/232_2942.PDF I am writing a VB6 prog to display a timing diagram from the RS232 dump as I can find NO-ONE that has got or ever had a copy of the LA-PC-Link software ! These things seem to proliferate on EBay but no-one seems to discuss them! (no-one is re-writing the ROM to provide some of the extended facilities ROM features ???) Are you (anybody?) still using an LA160 ? if so (or for more info :-) ) contact me on alan.needham_at_humberpower.co.uk

19 years, 11 months

OT? Nickel Metal Hydrids

by mtapley＠swri.edu

At 18:58 -0600 1/17/05, Dwight wrote: >Hi > I thought I'd pass on some info about these batteries. >I received a laptop with a "dead" battery. The voltage >as read from a meter was "0" volts. I mean dead! >I first stuck it into the laptop but quickly noticed >the smell of hot resistors ( bad idea ). I second the "bad idea" notation. I have had one (count it) one failure on a heavily used Powerbook 3400 I've had as my primary computer since they first came out (about 6 years, extensive airline travel, etc.) That was when I took a discharged NiMH battery (had been on the shelf for 3-4 years), put it into the machine with the machine plugged in, and ran the battery-cycling program Apple offered for the 5300 and 3400. Battery started to charge (maybe 20 seconds), I pulled wall power (as instructed), machine went down hard with an ugly noise and stayed down until it got a new power supply board. I didn't see the old one, but I'm morally certain the escape of some magic smoke was involved. Since then I've been very very careful to deal with near-dead NiMH batteries using a non-critical piece of hardware, rather than a built-in charger. However, same laptop and same battery are still giving good service (my secondary machine, now) so I guess I second the below as well. > Moral of the story, don't give up on these batteries. >They are remarkably tough. Most NiCads batteries would >not recover from such a level. >Dwight > -- - Mark 210-522-6025, temporary cell 240-375-2995

19 years, 11 months

VAX 6000-420 Available

by thoth2＠mac.com

Hello, world. Used to post here in another life when I was more actively collecting DEC equipment. Thought this would be a good place to start with this: I have a VAX 6000-420 with SF200 rack available for pick-up in Rhome, Texas (20-some miles north of Fort Worth). Acquired it a few years back and haven't done anything with it, so I figure I should pass it on to someone who has an interest in it. The system is in decent physical shape, some of the metal inside the SF200 rack has been bent a little, and if I remember correctly, one or two of the fingers in one of the card cages is broken. It has been stored in my father's house for the last couple of years. I have never powered it on, so I cannot tell you if it is in working condition or not. If anyone is interested, I can post pictures to my personal website. I would like to get rid of it, and I am sure my father would as well! There is no immediate hurry, however the sooner the better, I suppose. As for what I want for it, I'm not picky. DEC (especially PDP-11) stuff, SGI or Sun (especially SGI) equipment, or any old/odd/obscure workstation type equipment would be very nice. Older SGI IRIS stuff is high on my wish list, and my brother has been desperately searching for a PERQ workstation as of late. Anyway, if anyone is interested at all, email me personally and we can work something out. Thanks, -- Owen Robertson

19 years, 11 months

Misc available for free

by gmanuel＠gmconsulting.net

To the owner of this equiptment. I know that you sent me a reply to this on the 17th but my wife was on my computer and I heard a whoops. LOL... She accidentally deleted your reply to me. Could you please resend it. Thank you very much, she had already cleared everything permanently by the time I got to her. LOL Thank you for your time and sorry for the inconvience, Greg Manuel -----Original Message----- From: GManuel (GMC) [mailto:gmanuel@gmconsulting.net] Sent: Monday, January 17, 2005 5:56 AM To: General Discussion: On-Topic Posts Only Subject: RE: Misc available for free I would be interested in the Commodore 128 group and/or the Zip Drive group. Can you please tell me what shipping would be to the 19074 zipcode. You can email me direct at gmanuel at gmconsulting dot net. Thank you in advance for your time. Greg Manuel -----Original Message----- From: cctech-bounces(a)classiccmp.org [mailto:cctech-bounces@classiccmp.org]On Behalf Of Chad Fernandez Sent: Sunday, January 16, 2005 5:36 PM To: rescue(a)sunhelp.org; cctalk(a)classiccmp.org Subject: Misc available for free Hey all, Free, plus shipping. I have everything split into 5 groups. I don't want to split the groups up, as I don't want to be sending out 100 boxs in 100 different directions. -Commodore 128, good shape cosmetically, all cords, power supply etc, original box, but doesn't work. It would freeze up on me, and I lost interest. -Zip100 for PC's (parallel port), new---I opened it, but I can't get it to work on either of my machines. It may very well be fine, since I can't get a Micro Solutions to work on my machines either. -a box full of PC leftovers, a pair of earlier Pentium class chips, slot covers, bay covers, centronics scsi cables, internal 50 pin scsi cables, floppy cables, several fans, a small scsi drive, a small ide drive, Hayes Accura 336 modem, drive rails, blah blah blah..... -IBM AT motherboard, serial card, 8/16 bit VGA card, Adaptec 1542B scsi card, 8-bit ISA MFM ST11R HD controller, Unisys Personal Workstation 2 Multiple Port Board with splitter cable drivers and instructions. -USR Courier V Everything (older one), doesn't seem to work, but has instructions, power supply, and good shape cosmetically..... maybe you need a PS to fix one, or make it look better? Chad Fernandez Michigan, USA >>> FREE spam killer: http://eliminatespam.com * FREE PopUp Buster+: http://popupbuster.net >>> FREE spam killer: http://eliminatespam.com * FREE PopUp Buster+: http://popupbuster.net

19 years, 11 months

Anyone recognize MK4116E ?

by dave04a＠dunfield.com

Hi tony, >Are there any other markings on them? I remember once seeing some Mostek >'chips' like these that had 2 off 4164s on top, and were essentially 128K >bit DRAMs (separate CAS signals to the 2 halves IIRC). Yes, they are Mostek - and I recall the stacked 4164's in the IBM AT - I just posted that they were 4116s, but thats due to bad bits in the organic memory array - you just reminded me that they were 4164's - allowing 512K on the 256K board - ahh the days of such huge capacity... >I wondef if you've found a 32K bit version made from 2 off 4116s. It does appear that this is what these things are ... IIRC, there was a similar stacked arrangement for SRAM chips in the Radio Shack (Kyocera) Model-100 - the "8k" device was actually 4 x 2k devices on a small carrier - problem was that they brought out the 4 selects instead of address lines, so you couldn't just put in an 8k device - I bought a third party RAM chip which had an 8k device on a small board with some diodes to generate a common select (the extra address lines must have been there as well, because there was no other logic on the board) - seemed a skunkwork design to me, however it never gave me trouble (in fact it's still working). What wonderful little things get created to fill in the "gaps" in available devices... Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

19 years, 11 months

Anyone recognize MK4116E ?

by dave04a＠dunfield.com

At 17:16 17/01/2005 -0800, you wrote: >Dave wrote: >> about a dozen interesting looking chips, which are >> labled: MK4116E-3 > >That's the part number of the individual CLCC chips, not >the complete part. The complete part is an MK4332. This makes sense, and you are right, both parts are labled identically... I can't find a "whole device" part number. >> This appear to be a 9-pin DIP ceramic carrier with >18 pin Yes - I counted one side and failed to x2 before posting. >18 contact each, of which only 16 are used. Those are >plain old 16K DRAMs. > >> Anyone recognize these? My guess is some sort of RAM >> (dynamic)? Clearly not the same as a standard 4116 DRAM. > >Just two of them packaged together. So this is a 32k bit DRAM device? (which explains the 18 pins) - I don't recall running across such a beast before. Been through *LOTS* of 4116 16K DIP DRAMS, and an equally big number of 4164s over the years... Actually, now that I think of it, I do have a bag of the "doubled up" RAM chips from a IBM AT - these look like two 4116's stacked on top of each other - so these are just a variation of the same thing ...? >> anyone know what they were used in? > >Some PC clones. Some Apple IIIs. Various other stuff. Thanks. Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

19 years, 11 months

AMI

by aw288＠osfn.org

I have a chip here, an 1101 marked "sample" with a datecode of 7103. Very likely it is a second sourced Intel 1101. The logo is a new one on me, and I think it may be a mutant AMI, but from my resources, I am just guessing. I dug up a 1970 AMI databook, and the logo does not match. The one on the book is the A over M next to I version, and the thing on the chip looks like five lines next to each other, with the first line being somewhat curved (sort of like a half-circle) and the last being a tad shorter with a dot over it. The standard mid 1970s AMI logo is simply A next to M next to I. Does anyone know if AMI tried a strange logo between the two known ones - perhaps one that matches my chip? Could this logo not be AMI? William Donzelli aw288(a)osfn.org

19 years, 11 months

Nickel Metal Hydrids

by pete＠dunnington.u-net.com

On Jan 17 2005, 17:06, Paul Koning wrote: > >>>>> "shoppa" == shoppa classiccmp <shoppa_classiccmp(a)trailing-edge.com> writes: > shoppa> This raises a question for refurbishing older equipment: is > shoppa> it always OK to just drop a set of NiMH's in place of > shoppa> same-size NiCad's? Most of the "stupid" NiCad battery > shoppa> chargers were just 0.1C trickle chargers, but the "smart" > shoppa> ones that looked for the voltage rise at the end of charge of > shoppa> a NiCad may not see this with a NiMH pack. Anyone have any > shoppa> experience? > > I'm not sure that a trickle charger that works for NiCd is ok for > NiMH, and I am positive that a fast charger for the one will NOT work > right for the other. Each battery technology has its own charging > rules -- lead acid, NiCd, NiMH, and the various flavors of Lithium > battery are all different in very significant ways. Lead-acid, lithium, various others, and NiMH/NiCd certainly need very different charging regimes, but NiMH and NiCd are very similar to each other. The most important difference is that for a NiMH you should stop the charging when the voltage flattens out, and before it starts to fall again; for a NiCd you should stop when the voltage just starts to fall again. Of course, you shouldn't let them get too hot, and you shouldn't fast-charge very cold batteries either. Maxim do a couple of inexpensive chips (MAX712/MAX713) that take the hard work out of all that; used with a thermistor, they won't fast-charge cold cells until they warm up, and they won't fast-charge until the cell voltage rises above some threshold. I've used them but I've not put enough cycles through enough cells to see what the life is like. Interestingly, Maxim's data sheet indicates that the difference between detecting the voltage slope flattening and detecting the slight fall is less important to NiMH cells, especially when the charge rate is fairly *high*. That means for a lot of applications you could safely use an NiCd charger for NiMH cells, but vice-versa would leave you with slighly undercharged NiCds. -- Pete Peter Turnbull Network Manager University of York

19 years, 11 months

← Newer
1
...
24
25
26
27
28
29
30
...
56
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb January 2005