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101090 discussions

Vintage Computer Festival/Midwest 4 - Just one week away

by pat＠computer-refuge.org

Just a reminder that next weekend is my 4th annual Vintage Computer Festival/Midwest, held at Purdue University's Stewart Center. The event has speakers from 11am until 1pm each day, and the exhibits are open from 1pm until 5pm. The ticket price is $5 per day, or free if you're 17 or under, or have a valid Purdue student ID. The event is a celebration of the history of computing, and the machine and people that got us to where we are today. There will be lots of neat technology, and this year we have a door prize of an IBM PCjr from 1983! The PCjr was IBM's first attempt at an inexpensive home computer. I've got several exhibitors signed up, but still have room for more; if you want to show up to show off your collection, or have a few things to sell off at the consignment sale, sign up to be an exhibitor at http://vintage.org/2008/midwest/, or send me an email at this address. Exhibitors get one free t-shirt and free admission, which is included in the $10 per table fee. Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

17 years, 9 months

IBM floppy drives

by rtellason＠verizon.net

I tore apart a couple of assemblies that came out of an IBM "SSA" setup, these had a small switch panel, LCD, keyswitch (useless since I don't have keys), and a floppy drive which, when I pulled it out, resembled a PS/2 style drive, though it did have a separate 4-pin power connector and no faceplate. The short ribbon cable in there went to a single connector (pin type) that had the power wiring coming out of it as well. Can anybody use these? I also have a regular PS/2 floppy drive as well, and no particular need for it. I'd corresponded with somebody about that a while back, pulled it out of the box it was in, and it never went anywhere. This one has the single card-edge connector in the back of it, and again no faceplate. Either of these items of interest, feel free to contact me off-list. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

17 years, 9 months

Colorado Memory Systems Jumperless Tape Controller

by cclist＠sydex.com

> Date: Wed, 2 Jul 2008 06:57:09 -0700 > From: "Glen Slick" > The Colorado Memory Systems Jumperless Tape Controller 026-328 PCB has > a copyright date of 1990, which predates the ISAPNP specification by 4 > years so it must use a proprietary configuration method. Argh--bad memory bit--wrong floppytape controller! Yup--CMS used their own configuration protocol. Linux has a routine that's used by the ftape driver called fc-10.c that probes for the FC-10 and FC-20 controllers. I'm not sure if you have an FC-10, but it might be worth a try. The FC-20 that I have in front of me is PCB 026-121. I've got an FC-10 somewhere, but it'll take some time to dig it out if you're interested. FWIW, the FC-20 uses an Intel 82078 FDC to get 2Mbps. Now that I think about it, the FC-10 indeed wasn't PNP; you had to use a configuration program to set the I/O, IRQ and DMA options. Programs wanting to use the card simply probed a known range of I/O addresses to determine what the setup was. > If it supports FM that would make it useful. Maybe--it depends on the date code of the 82077AA. Earlier ones support FM fully; later ones don't. If the 82077AA is in a PLCC socket, you can replace it with the National equivalent (8477?) to get full FM support. But IMOHO, getting an FC-10/20 to work as a generic floppy controller seems like too much work to me. Cheers, Chuck

17 years, 9 months

Colorado Memory Systems Jumperless Tape Controller

by cclist＠sydex.com

> Date: Mon, 30 Jun 2008 18:53:36 -0700 > From: "Glen Slick" > Anyone have any info on a Colorado Memory Systems Jumperless Tape > Controller 026-328? > > It's an 8-bit ISA card with an Intel 82077AA floppy controller. I > have no intention of using this as a tape controller, but wondering if > it would be useful as a floppy controller? I think I've got that one as well as the 2Mb/sec follow-on one in my hellbox. IIRC, it sets the DMA/port/IRQ via the ISA-PNP mechanism (which accounts for the extra logic). If you've got an ISA PNP inventory program, you can easily verify this. An early version of PNP, but later ISA-equipped PCs support it via BIOS and there is usually some sort of manual configuration program for those that don't. Otherwise, it's pretty much a garden-variety floppy controller, though I don't recall if all of the ancillary signals are brought out to the connector (e.g., DISK CHANGE). Depending on the exact date code and stepping of the 82077, the card may or may not support writing FM-encoded data. Cheers, Chuck

17 years, 9 months

Subject: Is Needham Electronics Out of Business?

by les＠hildenbrandt.com

I think that they are out of business.. One of there competitors had a note on their web site to the effect that since needhams is out of business, they will give a trade in to their programmer. I have not been able to get on the Needhams page for 6 months or more. Les

17 years, 9 months

Willem programmer hackery

by dgriffi＠cs.csubak.edu

This discussion of chip programmers prompted me to try yet again to find something useful for programming chips using Linux. I found the software info page at www.willem.org which states that the DOS version of the controlling software is kept current. Now, suppose we run FreeDOS on a tiny x86 board talking out the rs232 port... -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

17 years, 9 months

Sony MP-F52W-00D needed

by marozzi＠asu.edu

Do you happen to know where I can locate one of these drives? Thank you, Bill -- William Marozzi Engineer Principal Department of Electronic Systems Arizona State University at the Polytechnic Campus

17 years, 9 months

RFC re Willem EEPROM programmers

by doc＠mdrconsult.com

I'm looking at buying a Willem programmer to go with my Data I/O 29B. Mostly I'll be using it for reading existing ROMs and programming stuff bigger than the 29B can handle. I've been looking at willem.org, on eBay, and at a couple of non-eBay sources. The first most obvious problem is that none of the available variants exactly match the willem.org board revisions, and I haven't found any cross-reference information. I'm probably not going for the new "true-USB" board. Any system I'll run it with has parallel ports. So... 1) I know a few folks on the list have willem boards. What board version do you have, where did you get it (if you remember), and are there any major pros and cons? 2) Does anybody here have experience with Kee Electronics? http://www.keeelectronics.com/ I'd rather buy direct than off eBay, and they look like a good product line. 3) Yes, I know the software's Windows-only. If anybody knows of a sub-$100 programmer with OS X software, I'd be overjoyed to hear about it. Otherwise, BFD; I have to keep a Windows box for work anyhow. Any input is greatly appreciated. Zane, I'm still getting a 554 reject from citrine.aracnet.com Doc

17 years, 9 months

Does anyone have an older copy of Ontrack Disk Manager?

by gstreet＠indy.net

Hello, I'm looking for an older version of Ontrack Disk Manager. I need to perform a bad sector check and low-level format for an MFM HD. I actually have 2 legit copies of the program (from the late 1980's), but, of course, I cannot find them now. Thank you, Robert Greenstreet gstreet at indy.net

17 years, 9 months

Is Needham Electronics Out of Business?

by trag＠io.com

Watching a few of the [E]EPROM programmer threads got me to thinking about my EMP-30, made by Needham Electronics. I have not been able to get their website to come up for months. Anyone know if they have gone out of business? I noticed that prices for their programmer accessories (e.g. family modules) jumped substantially a few years ago which is usually not a good sign. If they are gone, anyone know what the latest version of their software was? I know, it was me asking for support of some older Lattic CPLDs which pushed them over the edge... ;-) Jeff Walther

17 years, 9 months

Interak

by brianjp50＠tiscali.co.uk

Hi Errol just found your post regarding surplus Interak kit. I suppose it has gone long time ago. If not email me bacjk and we can talk. Regards Brian __________________________________________________________ Free games from Tiscali Play - http://www.tiscali.co.uk/play __________________________________________________________

17 years, 9 months

HP Keyboards

by dr.emiel＠xs4all.nl

Does any one knows if the keyboards of the 9000/200 series are interchangeble with the HP-150 keyboards ? Rik

17 years, 9 months

HP 1826-1388 Network interface chip

by ard＠p850ug1.demon.co.uk

I'm currently looking at the HP50962 SRM Coax interface PCB. This is a (custom) netowork card for HP9000/200 copmputers. I can't indentify one the the ICs, which basically links to the Coax netowrk cable. It's made by AMD (big AMD logo on it), and carries the HP house number 1826-1388, which I can't find anywhere. It's a 24 pin ceramic DIL package, and I've identified some of the pins : 1 - to ground trhough a resistor (maybe soemthing like Rx gain set) 3 - ground 4,5 - to a pulse transformer, the other side of which goes to the coax connector. Rx inout? 6,7 - ground 8 - Clock input 11 - Rx Clock output 13 - Rx Data output 15 - Tx Clock (output??) 17 - Tx Enable/ 18 - Tx Data 19,20,21 - +5V 22,23 - To 4,5 via low-value resistors (and thus to the pulse transformer). Tx Out? Looking down lists of ICs, I wonder if it's related to the AM7960 or AM7961, but I can't find data on those anywhere. So : 1) Does anyone have the data sheets on those ICs on-line anywhere? (As ever, please don't send pdfs or other large files to me here, but if you have said data sheet as a pdf, I can tell you how to get it to me). 2) Any other ideas as to what that chip might be. Thanks in advance -tony

17 years, 9 months

Available PDP 11/35

by quapla＠xs4all.nl

Hello All, I have available one PDP 11/35 in a 10.5" BA-11 box. It contains the processor backplane, programmers console, a cpu with the base processor, EIS option, stack limit, MMU and a 256Kb memory card. Next to that is has a 9 slot DD11 expansion backplane, and optionally a complete RK-11D disk controller. Please contact me off list with your offer. Thanks, Ed

17 years, 9 months

Apple Lisa 1 - restoration project

by cclist＠sydex.com

Vinegar! Vinegar! Vinegar! The common household type! >From a US cook's standpoint, if "vinegar" is specified with no qualifiers, the type is determined by the application. If I'm making a salad, a flavored vinegar, such as wine or malt or even apple cider vinegar is used. Balsamic vinegar has lots of gunk in it and is used for a more complex, somewhat sweet flavor in marinades and salad dressings. I'd never think of using it to clean a PCB. Rice wine vinegar is often used in oriental cooking--somewhat sticky when the water evaporates. If I'm pickling (e.g. dill pickles or making sauerkraut), I'll use distilled white vinegar (usually about a 5% solution) as it's the least expensive (commonly sold in gallon jugs). The same vinegar is used for removing lime deposits from a steam iron or coffee maker and for washing windows (if lime stains are present). Just plain old dilute acetic acid, source not important. Brass musical instrument players soak their instrument's valves and tubing in white vinegar to remove deposits left from saliva. Doesn't hurt the brass at all and leaves little smell behind. Sulfamic acid (dry crystals obtained from a paint store) is often used when cleaning masonry indoors where the fumes of muriatic acid would be objectionable. It's stronger-acting than vinegar, but less than muriatic acid and conveniently mixed from the crystals and water as needed. Cheers, Chuck

17 years, 9 months

Serial Keyboards on eBay...

by lbickley＠bickleywest.com

I recently restored a system that required a TTL serial keyboard. I initially "hacked" a setup using a VT520 (RS-232) with a "SchmartBoard" RS-232 to TTL converter. Then I found several Keytronic RS-232 serial keyboards on eBay from a single vendor. After reading the specs, I found the keyboard supports both RS-422 and RS-423 by jumper settings. The default setting is RS-422 - which means that one can use "one-side" of the differential output as TTL serial. It also defaults to 300BPS - which is what I needed. (The specs say it can do 9600BPS as well). For those who care, the keyboard is "driven" by an 8048 8-bit microcontroller. I bought four of these keyboards in a previous auction from the same vendor and they are in excellent condition. He now has them listed again as item #300237350802. Starting bid is $9.95... Regards, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

17 years, 9 months

Heathkit ETA-3400 Modifications

by dfinell＠satx.rr.com

Paul, While trying to find a Heathkit ETA-3400 I ran across your message authored in 2004 requesting a copy of interface/ops manual for this part. I believe I have the info you are looking for. Please let me know if you still need the info. 73's David Finell N7LRY

17 years, 9 months

Colorado Memory Systems Jumperless Tape Controller 026-328 Info?

by glen.slick＠gmail.com

Anyone have any info on a Colorado Memory Systems Jumperless Tape Controller 026-328? It's an 8-bit ISA card with an Intel 82077AA floppy controller. I have no intention of using this as a tape controller, but wondering if it would be useful as a floppy controller? Anyone have on programming info for this card? In addition to the 82077AA and 24MHz crystal there are 3 PAL16L8 and 2 PAL20L8. That's probably more logic and what would be needed for I/O address, IRQ, and DMA routing alone, but maybe not.

17 years, 9 months

Replacement "pick" roller for card reader

by phil＠ultimate.com

I picked up an HP7260A table top card reader, with the aim of restoring it to working condition. The major problem has been that the "pick" roller that moves the card out of the input hopper and through the first gate had melted into a pile of goo, ending up in a puddle in the output hopper. I only had to sacrifice four blank cards (hand fed) before getting one to pass thru the rest of the transport almost entirely unblemished(*). So far the control/sequencing circuitry seems to be working, but I haven't checked yet if any data is comming out the serial port. Thanks to the HP Computer Museum (www.hpmuseum.org), I found the maintenace manual, and an image of what the roller looked like (#48 in the image below): http://www.ultimate.com/phil/roller.jpg I used one of these readers when I was in High School c. 1978. Before finding the maintenance manual I had no memory of what the roller looked like, but it must have been something soft, with a lot of gripping power. Any suggestions (short of attempting to cast a replacemnt out of melted gumi candy)? The axle is a quarter inch or close, and roller needs to be at least a quarter inch thick. I'm tempted to drop in on a local rubber products company (Greene Rubber, in Woburn Ma), but knowing what to ask for would help! Thanks in advance for any suggestions. Phil (*) One pinch roller inside was slightly gooey, and still gives off blackness, no matter how many times I clean it. The pinch rollers all have a flat spot from having sat for many years, and I might try to replace them with O-rings, but it's not the top priority.

17 years, 9 months

1000sqft of raised flooring for $500

by aek＠bitsavers.org

Just spotted this on eBay http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220250708938

17 years, 9 months

Rockwell 6501 SBC Available

by technobug＠comcast.net

Cleaning house since movement therein has become difficult and while trashing out an old piece of equipment came across a SBC consisting of a Rockwell 6501 that ran a credit card reader. It has RS232 and what looks like room for a peripheral chip of some ilk. Viewing at <http://elipsoid.home.comcast.net/IMG_5640.JPG >. If there is any interest, first respondent takes it for postage. CRC

17 years, 9 months

Apple 1 on eBay

by us21090＠yahoo.com

Sellam, [Top answering, since inline is getting a bit long]. My fix to the array of dots the monitor was to build the Obtronix Apple-1 correctly! The problem was I accidentally swapped two resistors. On board location D1 (upper left near video connection) R1 should be 1500ohm and the 6 resistors at C2 should be 7500ohm. I had swapped R1 with one of the 6 resistors at location C2 (I don't think the location C2 resistors will cause dots since these are pull-down resistors). I had mixed up a brown with violet, swapping a 1500 ohm resister (brown-green-red) with a 7500 (violet-green-red). Not being a circuit guy (be nice, y'all) my mistake kinda made sense. If I remember my research correctly, pulses from the character generator and the sync signal generator are "combined" through R1, 1500ohm (for char gen) and R2, 3000ohm (for sync), meeting at the base of the video drive transistor. R1 and R2 *should* have a 1:2 ratio. My mistake (ie wrong R1) made it backwards and 2.5:1. The char gen pulses amplitude was less than it was supposed to be. Crank up the contrast to see the characters better and you start seeing sync residuals aka dots. Mind you, my analysis may be off. Do you have a way to contact Yumoto Hirohisa? I'd still like to pass on this information. BTW regarding Apple-1 photos, I was hoping someone would have copies of those at http://homepage2.nifty.com/56thWAREHOUSE/HAJIME.html Thanks, Scott ----- Original Message ---- From: Sellam Ismail <sellam at vintagetech.com> To: Scott Austin <us21090 at yahoo.com> Cc: cctalk at classiccmp.org Sent: Friday, June 27, 2008 5:32:10 PM Subject: Re: Apple 1 on eBay On Fri, 27 Jun 2008, Scott Austin wrote: > Why? In the photos of the monitor attached to the Apple 1, I recognized > a video problem that I ran into when I built my Repro Apple 1. It's an > array of small dots across the entire monitor screen. I wanted to > contact the owner to provide my bit of insight on the problem. Interesting! I too saw this issue on an Apple-1 I brokered a couple years back. If you turn down the contrast or something it seems to go away. What is your fix? > Does anyone know the Japanese owner(s) of Apple 1('s)? I have one in my registry. He bought the first Apple-1 I brokered in 2000 (at VCF 4.0). > At one time I only had the last name of an owner who had two Apple 1's. > Could it be him? This particular Japanese owner has two, so maybe/probably. His name is Yumoto Hirohisa. This is public knowledge, by the way, his story having been written about in Christine Finn's book, _Artifacts: An Archaeologist's Year in Silicon Valley_. > Does anyone have photos of a Japanese owner with his Apple 1? In fact, there's one in the book :) I have extra copies available for sale or trade (I think they cost me $20 or so). -- 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 ]

17 years, 10 months

FFS: Tecmar books

by silent700＠gmail.com

>From a big lot of stuff I picked up recently, free for cost of shipping (or local pickup of course) from 60074 USA: - Tecmar Treasure Chest Technical Reference - Tecmar Treasure Chest Users Guide - Tecmar Catalog 104 (memory/tape/hard disk/gfx/video/comms) - Tecmar Companion Software User's Guide Would prefer they all went out at once! Thanks -j

17 years, 10 months

Last call on MassPar, HP3000, etc.

by 9546924251＠mymetropcs.com

17 years, 10 months

Eclipse S/140 prom images

by chris＠mainecoon.com

Does anyone have Eclipse S/140 prom images (or a S/140 whose proms might be copied)? I'm long Nova 4s and toying with the idea of teaching one to be an S/140. -- Chris Kennedy chris at mainecoon.com AF6AP/AFA6KY http://www.mainecoon.com PGP KeyID 108DAB97 PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97 "Mr. McKittrick, after careful consideration..."

17 years, 10 months

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