test-drb

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101090 discussions

Welcome to the "cctech" mailing list (PC Parts)

by JHMcCarthy＠aol.com

To be posted for members: I am president of the IBMSFQCCAA and we have spent the last few years restoring IBM PC, PCXT, PC Jr, and PS 2 units. We have a number of parts and some functioning units available for you if you are interested in covering the shipping. We also have a significant number of associated Hardware and Software manuals. Let me know if you are interested. ---- Jud Justin (Jud) McCarthy 251 SW 9th Ave Boca Raton, FL 33486 Home (561)391-1422 Cell: (561)504-7048 In a message dated 11/22/2012 7:27:50 A.M. Eastern Standard Time, cctech-request at classiccmp.org writes: cctech at classiccmp.org

13 years, 4 months

identifying Data General boards

by andrea.pastega＠gmail.com

Hello. I'm trying to identify some DG boards using the 107-xxxxxx-xx numbers. There's a reference list to associate these numbers to the product series? BTW, the numbers I have are these, with draft descriptions: ALU Arithmetic Logic Unit Board. 107-001627-02 Dual Video Board. 107-501548-01 Disk Controller Board. 107-000375-06 ILC Intelligent Local Network Control Board. 10700205403 Disk Logic Board. 107-00089104 Servo/Clock Board. 107-000738-01 Sync / Async Controller Board. 107-00083404 MVII Bus Repeater. 107-00218501 Thanks Andrea

13 years, 4 months

Kerrville TX warehouse sale

by sales＠elecplus.com

The old IBM terminal is gone, as is all of the Display Write stuff. The HP terminals are also gone, as is the original Apple ][, and a few of the Apple single floppy drives. The Apple III is also gone, but the Lisa is still here. Those who wanted things (other than what is sold above), please email me again, and I will get you pics and requested prices. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 (830)792-3400 phone (830)792-3404 fax AOL IM elcpls _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2793 / Virus Database: 2634/5934 - Release Date: 12/03/12

13 years, 4 months

3M HCD-75 tape format

by aek＠bitsavers.org

FYI I was looking to see if there was a patent on the 3M Kappamat format, and came across patent 4422111 which appears to describe the DC600HC 16 track format. These drives were used in early 80's HP combo winchester/tape systems. A HCD-75 manual is on bitsavers under 3m/

13 years, 4 months

discrete transistor computer

by ed.spittles＠gmail.com

On 18 November 2012 19:14, Ed Spittles <ed.spittles at gmail.com> wrote: > On 16/11/2012 08:13, ben wrote: >> On 11/16/2012 12:50 AM, Ed Spittles wrote: >>>> [conversation about Wireless World articles - a digital computer >>>> built from reject germanium transistors] >>> >>> Aha: here's an online version of a pamphlet reprinting that article >>> series, which gives credit to Brian Crank: >>> http://www.smrcc.org.uk/members/g4ugm/Manuals/wirelessworldcomputer.pdf >>> >> How come this was never posted when you still could get germanium >> transistors. :) >> Ben. >> > There was a dire shortage of the very rare round tuits during that > period of my life, plus no access to a decent scanner. I actually wrote > my first program when I was 17 or 18 years old ( so 1971/2) on a > germanium transistor computer that had been built by my school derived > from the wireless world design. I was taught by the school Music > Teacher Hector Parr (http://www.hectorparr.freeuk.com/) who learnt to > program so he could calculate tables of Organ Pipe lengths to assist in > re-building the School pipe organ. > > Dave Wade G4UGM Fantastic! I got in touch with Hector Parr, and he directed me to a memoir he's written, and I now have a story: One Alan Wilkinson wrote the book 'Computer Models' (a copy is now on its way to me) which is most likely inspired by Brian Crank's article series. Alan was teaching at Spennymoor Grammar School, and Hector was teaching at the nearby Darlington Grammar School. Hector read Alan's book and proceeded to get the Maths department and pupils to finance and build a machine called DENICE, designed from scratch but with inspiration >from the book. Alan moved on to Teesside Polytechnic where he looked after an IBM 1620, which was made available to schoolchildren. Hector later taught at Barnard Castle School, where he was photographed in 1978 with a different computer: http://ww2.durham.gov.uk/dre/pgDre.aspx?ID=DRE10345&PIC=Y His memoir can be bought at http://www.lulu.com/shop/hector-c-parr/music-maths-and-machines/paperback/p… - there's a copy of this too on its way to me. I now discover that Alan's book has been referenced at http://en.wikipedia.org/wiki/Transistor_computer#cite_note-15 since Nov 2010. (As for the reported cost of ?50 in the late 60's, I'm told a weekly shop for a couple would be ?2 and a pint of rough cider would be 1/9d (that is, 21 old pence, which were 240 to the pound.) According to http://safalra.com/other/historical-uk-inflation-price-conversion/, the project would cost ?750 today, although those anecdotal prices suggest rather more.) I wrote up some notes on the WW machine here: http://forum.6502.org/viewtopic.php?f=3&t=2333 Cheers Ed

13 years, 4 months

Identifying Data General 107-xxxxxx-xx boards

by shadoooo＠gmail.com

13 years, 4 months

HP 2113B psu question

by hp-fix＠xs4all.nl

One of my HP 2113B CPU's doesn't boot the right way, after switching it on all lights are on except the over flow light which stays out. I know it should be an memory error, but removing all the memory boards and starting with a known good memory controller and memory board gives the same result. Because the PSU has the power fail option and I removed the batteries and placed the plug at the battery in connector, I now suspect the PSU. The voltages checked out ok, except the 5M and 12M voltages come up a few seconds (5 to 10 seconds) later than the rest of the voltages. I'm afraid the time interval is too long but I'm not sure. Is there anyone who knows what the interval should be ? Or has any clou why it's not working ? -Rik

13 years, 4 months

PDP-11/35-S

by jack.rubin＠ameritech.net

What is the "S" variant of the 11/35? It's different enough to have its fiche but since I can't yet read the fiche, I don't know what distinguishes it from the "regular" 11/35. Does anyone know? Thanks, Jack

13 years, 4 months

Kim 1 on denver craigslist

by maurice.smulders＠gmail.com

There is a Kim 1 for sale in denver http://denver.craigslist.org/sys/3289285103.html

13 years, 4 months

System Console from PDP-10 KA10 System Number 105.

by michael.99.thompson＠gmail.com

> From: Pontus <pontus at update.uu.se> > Date: Sun, 02 Dec 2012 23:43:59 +0100 > Subject: Re: System Console from PDP-10 KA10 System Number 105. > On 12/02/2012 04:29 PM, Michael Thompson wrote: >> >> The System Console from the DEC PDP-10 KA-10 System #105 at >> BOCES-LIRICS was recently donated to the RICM. >> We are considering mounting a System-on-a-Chip to the back of the >> console and making it a "live" PDP-10. >> >> For more information on the console see: >> https://sites.google.com/a/ricomputermuseum.org/home/Home/interesting_compu… >> > > Very nice. It is smaller than I have imagined. Bruce Maier is excellent for scale :) > > /P Keep in mind that Bruce is taller than most people, so the console is pretty big. I will take some better pictures next week and add some objects for scale. -- Michael Thompson

13 years, 4 months

Lots and Lots of Macs

by slandon110＠gmail.com

Im still doing the big warehouse cleanout. I have lots of everything I have the following PowerMacs and 68k Macs, and Apple IIGS Monitors and Monitor IIs Multiples of each IIGS Monitors are 25 dollars each Monitor //s are $25 each. PowerMacs all have RAM and SCSI HDDs, Priced to sell at $40 each 7300/200 7600/132 7500/180 Beige G3 MT 333mhz 6100/66 6100/60 8100/80 8100/110 7100/66av 7100/80 9500/200 9600/200 8500/200 68K Macs all $40 each IICI- Lots of em IISI- Lots of em IICX- Lots of em Quadra 650 4 of em Centris 610 Centris 650 LC II's, LC IIIs Keyboards, Mice you name it I have it. I still have about 48 skids of stuff to pick up and sort through Thanks Steve

13 years, 4 months

System Console from PDP-10 KA10 System Number 105.

by michael.99.thompson＠gmail.com

The System Console from the DEC PDP-10 KA-10 System #105 at BOCES-LIRICS was recently donated to the RICM. We are considering mounting a System-on-a-Chip to the back of the console and making it a "live" PDP-10. For more information on the console see: https://sites.google.com/a/ricomputermuseum.org/home/Home/interesting_compu… -- Michael Thompson

13 years, 4 months

TRS-Model 1 video on YouTube

by terry＠webweavers.co.nz

Remember the Model 1? I'm just letting the list members know I put a YouTube video up covering this classic This is the last notice I'll post on classicmmp.org regarding these videos. I intend to gradually cover all the machines I've got and I don't want to be accused of spam by using the list to notify people, even if some may be interested. Just subscribe to my YouTube channel if you want to be alerted to subsequent videos. Cheers Terry (Tez)

13 years, 4 months

Do you like RS232?

by lproven＠gmail.com

If you answered yes: http://rs232club.org/ Join the other 5 members in talking about the classic serial protocol! *Not* the club song: http://www.youtube.com/watch?v=CDlj0jBtYmQ -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

13 years, 4 months

FPUIB: Esoteric crap (11/28/12)

by Arno_1983＠gmx.de

> > > > > (DE15F to MiniDin-4 labelled "ADB") > > > > > DE15F to DE9F > > > THAT one is labelled "RS232C"!!! > > I asusme it's the PC/AT serial port wiring. Althought i thought that > > RS232C actually specified the DB25 conenctor. > > and I have NEVER seen a DE15 used for any kind of serial. > > Considering that these cables probably came from an LCD projector, it is > PROBABLY a monitor adapter of some sort. Somebody clueless may have > looked at the DE9 and automatically labelled it as "RS232" (as a misuse, > meaning serial) Err, not necessarily. I'm rather thinking that the corresponding LCD projector ("beamer") might have included or at least supported a "presenter", i.e. a wireless, handheld mini-trackball or hat-switch type pointing device, whose signals are relayed to the host system via the respective pointing device interface. As only one of these interfaces is needed at a given time (ADB when connected to a Mac, either RS232 or PS/2 for a legacy PC, or USB for a modern one), it kind of makes sense to bring these out in a single connector (in this case, the DE15) and include the different adapter cables for connecting it to the host system. I got a similar set of cables some years ago, these had a not-quite-MiniDIN connector at the projector end and either DE9, MiniDIN-6 or USB on the other. They were factory labelled as belonging to an ASK C105. If so, very usefor for somebody having the corresponding projector, not so much for anyone else. Hope this helps - so long, Arno Kletzander

13 years, 4 months

FYI: NEC PC-8500 available in Bellingham, WA

by derschjo＠gmail.com

Just in case anyone's interested -- there's a complete (in-box) NEC PC-8500 setup for sale at Aladdin's Antiques in Bellingham, WA.It's in the area behind the front desknear an Amiga 2000:). This is a 64K Z80 system in clamshell laptop form-factor, running CP/M >from ROM. 80x25character LCD display, runs off of 4x"C" batteries. The unit for sale includes the basic system, PC-8441A-K CRT/Floppy Interface, and PC-8431A Floppy Drive. There weretwo complete sets, but I bought one of them :). Works great so far. They were asking $85 for the complete set, but I talked them down a bit. - Josh

13 years, 4 months

PDP-8 bits available

by djg＠pdp8online.com

I got this email and I'm not close enough to pick up so forwarding to this list. Reply to John Murray jh.murray @ comcast . net, not me or list --- Unknown condition, but the stuff was operational 20 years ago. Already gave some stuff away, but missed this stuff. Been in my garage: M8317 M8350 M623 ribbon cables power controllers Reside in Denver area. First come, first served.

13 years, 4 months

N8VEM home brew computing article

by LYNCHAJ＠YAHOO.COM

Hi One of the N8VEM builders wrote a draft magazine article that provides a great overview of the N8VEM home brew computing project. It is so good I thought other hobbyists would like to read it and better understand what we are doing. http://n8vem-sbc.pbworks.com/w/file/61597682/N8VEM%20article.doc Most of these PCBs I have physically on the shelf waiting to go to builders. Others will be reordered and builders always have the option of getting their own based on the information on the website. http://n8vem-sbc.pbworks.com/w/page/35044530/PCB%20Inventory Please send me an email if interested. Thanks and have a nice day! Andrew Lynch

13 years, 4 months

Microvax II won't boot, hardware error?

by saquinn624＠aol.com

Make sure all your connections are firm and good, especially the PMI connection over the ribbon cable. I'd probably even take the ribbon cable off and re-crimp it in a vise to make sure the connections are firm.

13 years, 4 months

Selling a PDP-11/04 computer on Ebay

by filipmaj＠gmail.com

On Fri, Nov 30, 2012 at 1:24 PM, Filip Maj <filipmaj at gmail.com> wrote: > Selling one currently on Ebay. Got another more complete one and do not > have the room for this. > > http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=150957191763 >

13 years, 4 months

Looking for Disk Jockey 2D-B Bootable Floppy

by trebor78＠execpc.com

I am Looking for a Bootable 8" Disk Jockey 2D-B Floppy. Preferable a Single Sided One formated for 1024 Byte Sectors. I have copies of a Floppy but was unable to copy the System Tracks. I Need one that will let me rebuild those floppies Can anyone Help trebor 78 at execpc.com Drop spaces and replace at=@ Thanks Bob in Wisconsin

13 years, 4 months

FPUIB: Esoteric crap (11/28/12)

by cctech＠beyondthepale.ie

Fred wrote: > > > > IEC power cord with mains plug 2 straight blades in a line, with > > > perpendicular ground blade "13A 250V" "Fused" > > Almsot certainly a UK (BS1363) mains plug. The 'blades;' should be quite > > thich rectanguar pins, with the earth pin larger in all 3 dimensions to > > the others. The fuse is a 1" long cartridge fuse either inside the plug > > 9if it's not moulded to the cable) or under in a holder on the pin face > > of the plug. > Yes > > Do you want them? > > If not, does ANYBODY want that kind of stuff? > (There is a metric buttload of stuff that I can't even get to until some > stuff starts leaving. (Y'know those puzzles with square pieces with > numbers on them, or different shaped rectangles, and one unoccupied > square? - I need to clear that "unoccupied" square!)) > I would prefer to not have to pay much postage nor dump fees to get rid of > it. > Much as I sympathise with the puzzle problem, I can't imagine that there would be many who are interested in these. In countries where BS1363 sockets are used, IEC power cords with BS1363 plugs on them just accumulate without anyone having to do anything. We use them here in Ireland and I've got a big box of those leads. (Anybody want some?) In other countries, they are not much use unless someone decides to fit out their workshop with BS1363 sockets. Regards, Peter Coghlan.

13 years, 4 months

Commodore PET 2001 Chiclet Keyboard Repair

by arkaxow＠gmail.com

I am working on getting a Commodore PET 2001 Chiclet keyboard working again. Some of the keys were not working. So I disassembled it and cleaned it. But some of the keys still didn?t work properly. I noticed that some of the keys had something metallic on the bottom of them and others didn?t. It appeared to be random. I talked to some friends and they seemed to think that that the rubber in the keys is a sorta conductive silicon. My suspicion is that this silicon becomes less conductive over time or is not reliable to being with. It seems that the previous owner had fixed some keys by adding some metal to the bottom of the keys. I think it is ordinary aluminum, but I am not sure. When I replaced one of the keys with the thin metal on the bottom to previously not working key, then it worked. My plan is to put this metal on the bottom of all the keys so that they will all work and be reliable. If anyone knows what kind of metal it is and where I can buy it, then I would appreciate it ! Thanks, Jeff Brace

13 years, 4 months

Fw: 68360 help

by lynchaj＠yahoo.com

Hi Received a request for help on a MC68360 prototype board. This is an intermediate step to the planned MC68040 SBC. If anyone has expertise with the MC68360 and can help please contact me at LYNCHAJ at YAHOO.COM or on the N8VEM mailing list. Thanks! Andrew Lynch From: To: n8vem at googlegroups.com Sent: Sunday, November 25, 2012 7:58 PM Subject: [N8VEM: 15020] 68360 help Hi I have been working of the MC68360 prototype that would be the precursor to the 68040 build. ?I am stymied and would like any ideas on how to proceed. ?Attached are the schematics. ?What I observe on power up is that RESTH* is always low - it is pulled up with a 10K resistor. ? I have tried all kinds of things to figure out why this is so but can not seem to crack this. ?I feel if I can get past this always low condition I might be able to make progress would be greatly appreciated. ?I also have a couple of bare boards if anyone is interested in taking a stab at this. Thanks in advance? Dave--

13 years, 4 months

TU58 tape formatter (was Re: rebuilding DC100A cartridges?)

by shadoooo＠gmail.com

Hello. Do you still have an image of the ROM data? I would study it a little, as producing a formatter (also using TU58 mechanics but different electronic) would be very interesting... Andrea > I've disassembled the firmware its not there. It's not that hard to do > the reason I say modded is the 8085 > has only has 256bytes of ram and 2k of rom on the board. So bypassing > the 8085 or extending the memory > and firmware by modding the board for more rom space and maybe ram space > could make the needed > formatter. In the end you need the TU58 board for the drive interface > and motor control.

13 years, 4 months

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