Re: ge first transistors

2019-11-14 Thread Jon Elson via cctalk
On 11/14/2019 09:00 AM, Chuck Guzis via cctalk wrote: Julius Edgar Lilienfeld filed a patent in 1925 (US 1745175) My understanding is he got a single transistor to work ONCE for a few hours. Maybe actually he got a couple to work, but they were very fragile and degraded quickly. The Bell

Re: Andromeda disk controller diag/format disk found

2019-11-05 Thread Jon Elson via cctalk
On 11/05/2019 09:24 PM, allison via cctalk wrote: On 11/5/19 10:08 PM, Jon Elson via cctalk wrote: On 11/05/2019 12:11 PM, Al Kossow via cctalk wrote: it would be good to get it archived. I can do it if no one else volunteers OK, you're on. It is a 5.25 " disk in RX50 format, RT-11

Re: Andromeda disk controller diag/format disk found

2019-11-05 Thread Jon Elson via cctalk
On 11/05/2019 12:11 PM, Al Kossow via cctalk wrote: it would be good to get it archived. I can do it if no one else volunteers OK, you're on. It is a 5.25 " disk in RX50 format, RT-11 file structure, and bootable on both PDP-11 and uVAX-II. let me know where to send it. Jon

Andromeda disk controller diag/format disk found

2019-11-05 Thread Jon Elson via cctalk
If anybody has an Andromeda Q-bus MFM hard drive/floppy controller, I have dug up the diags/utilities disk for it. This will boot from the floppy on an LSI-11 or MicroVAX-II and allow you to format drives and run diagnostics. Anybody need this? I have no idea if the floppy is still readable,

Re: Cheap minicomputer (Tracor-Northern 1610) on Facebook Markeplace (Allentown, PA) 18 bit?

2019-11-03 Thread Jon Elson via cctalk
On 11/03/2019 02:33 PM, Brent Hilpert via cctalk wrote: On 2019-Nov-02, at 2:39 PM, Guy Dunphy via cctalk wrote: A rack, a Tektronix XY display, a rack drawer, blanking panels, some neat mysterious instruments, two 8" floppy drives, and a probable PDP-something all for $45? For what little

Re: Cheap minicomputer (Tracor-Northern 1610) on Facebook Markeplace (Allentown, PA) 18 bit?

2019-11-02 Thread Jon Elson via cctalk
On 11/02/2019 03:32 AM, cctalk--- via cctalk wrote: Has anyone seen this? It looks like an 18-bit machine. https://www.facebook.com/marketplace/item/736222363558907/ At least at one time, these things contained PDP-11's. The CPU at the bottom sure looks like a PDP-11, I'm thinking it

Re: And yet another batch of IBM big iron one Ebay Germany..

2019-10-29 Thread Jon Elson via cctalk
On 10/29/2019 09:45 AM, jos via cctalk wrote: an IBM 4331 for 1000 Euro b.i.n. seems OK to me, if I was in that sort of thing ! See https://www.ebay.de/itm/IBM-grosrechner/184010116585 and his other offerings... WOW, this is some amazing stuff he has! Jon

Re: Can't contact Dave McGuire AK4HZ

2019-10-28 Thread Jon Elson via cctalk
On 10/28/2019 05:11 AM, Warner Losh via cctalk wrote: If you didn't want him to get the message, there's always the option of leaving him voicemail. Warner cheers All taken care of, now. I don't know why he wasn't getting my replies. Jon

Can't contact Dave McGuire AK4HZ

2019-10-26 Thread Jon Elson via cctalk
Dave McQuire keeps emailing me about the CAMAC controller boards, but he obviously is not getting my replies. Anybody know how to contact him? Thanks, Jon

Re: plated wire memory

2019-10-20 Thread Jon Elson via cctalk
On 10/20/2019 09:45 AM, Nigel Johnson via cctalk wrote: I remember an IBM engineer talking about this at our ham radio club. The wire was coiled inside a drum and pulses were sent down the wire. The 'read head' was a magnetic pickup at the other end of the coil - and access time was however

Re: IBM MST extender cards

2019-10-11 Thread Jon Elson via cctalk
On 10/11/2019 03:50 AM, jim stephens via cctalk wrote: On 10/10/2019 10:49 AM, Al Kossow via cctalk wrote: https://www.ebay.com/itm/352810055470 are these extender cards for IBM MST modules? Oh, and by the way, that is an UNWRAPPING tool in the picture, not a wire-wrap tool. (I have

Re: Nuke Redmond!

2019-10-07 Thread Jon Elson via cctalk
On 10/07/2019 12:26 PM, Chuck Guzis via cctalk wrote: I hear you--I've been on Linux for day-to-day stuff for quite a few years, but keep a copy of XP on VirtualBox just in case. Some of the older systems that I have legacy peripherals in also require Windows, but it's all old versions. I

Nat Semi MM5262N available

2019-10-02 Thread Jon Elson via cctalk
I have about 240 pieces of the national Semiconductor MM5262N 2K x 1 DRAM chips. They appear to be unused, in aluminum (not plastic) tubes. Chips are plastic packaged. 365 ns access time, 475 ns read cycle. Anybody need them to fix an old computer? Jon

ECL static RAM ( 10144L)

2019-10-02 Thread Jon Elson via cctalk
I have 400 pieces of Signetics 10144L ECL static RAM chips. Anybody need some? These were salvaged from boards by a surplus dealer (Alltronics, I think). They are a 256 X 1 bit RAM, somewhere around 20 ns access time, ceramic package. Jon

Re: SGI Challenge M memory boards

2019-10-02 Thread Jon Elson via cctalk
On 10/02/2019 12:18 PM, Dennis Grevenstein via cctech wrote: Hi, Jon wrote: I have 15 pieces of memory SIMMs for the Challenge M series (funny, seems like there should be an even #). Pics here : http://pico-systems.com/images/SGIChallenge.JPG A Challenge M is basically a server variant of

SGI Challenge M memory boards

2019-10-01 Thread Jon Elson via cctalk
I have 15 pieces of memory SIMMs for the Challenge M series (funny, seems like there should be an even #). Pics here : http://pico-systems.com/images/SGIChallenge.JPG Jon

Re: RAMTEK memory boards FTGH

2019-10-01 Thread Jon Elson via cctalk
On 09/30/2019 08:21 PM, Jon Elson via cctalk wrote: I have 20 RAMTEK memory boards from late '80s frame buffers. They each have 20 TMS4161-20NL video RAM chips on them. The RAMTEK part # is ASSY 510857 Anyone have any interest? Jon Here's a pic : http://pico-systems.com/images/RAMTEK.JPG

Re: Standard Engineering CAMAC crate controller with LSI-11

2019-10-01 Thread Jon Elson via cctalk
On 09/30/2019 09:17 PM, Adrian Stoness via cctalk wrote: just a box of boards or a system missing a memoru module? Here's the LSI11/2 module : http://pico-systems.com/images/CAMACLSI.JPG Here's the CAMAC interface : http://pico-systems.com/images/CAMACintf.JPG Here's the panel label :

Re: Tek 500 pulser modules

2019-10-01 Thread Jon Elson via cctalk
On 10/01/2019 08:02 AM, Al Kossow via cctalk wrote: http://www.pulseinstruments.com/plugins/PI-451A_Users_Manual.pdf 100ns to 100us with MOS outputs Wow, good find! Thanks, Jon

Re: Standard Engineering CAMAC crate controller with LSI-11

2019-09-30 Thread Jon Elson via cctalk
On 09/30/2019 09:17 PM, Adrian Stoness via cctalk wrote: just a box of boards or a system missing a memoru module? OK, if you are not familiar with it, CAMAC is a standard for data acquisition and control, that has 25-slot powered crates. At the right edge, the last 2 slots are dedicated as

Chabin TLC cables

2019-09-30 Thread Jon Elson via cctalk
I have some bundles of Chabin TLC (transmission line cables) from a Memorex 3674 disk control. This is the exact same material used in IBM 360s. It has 18 signal conductors and 36 grounds. They are about 3 feet long, and I have something like 11 of them. Any interest? Jon

Tek 500 pulser modules

2019-09-30 Thread Jon Elson via cctalk
I have 3 units of the Pulse Instruments PI-451A programmable pulse driver. One has a note that it is bad. These seem to be general purpose pulse generators, capable of +/- 25 V into 50 Ohms (but that is just from reading the labels on the panel.) Anybody have a use for them? If I had a

Standard Engineering CAMAC crate controller with LSI-11

2019-09-30 Thread Jon Elson via cctalk
I have a 3-board set, a Standar Engineering MIK-11/2, which is a controller for a CAMAC crate, with an LSI-11/2 (M7270) in it. It also has a serial port in it. I thought there was a memory that went with it, but I can't seem to find that. Anybody have any use for this? Jon

RAMTEK memory boards FTGH

2019-09-30 Thread Jon Elson via cctalk
I have 20 RAMTEK memory boards from late '80s frame buffers. They each have 20 TMS4161-20NL video RAM chips on them. The RAMTEK part # is ASSY 510857 Anyone have any interest? Jon

Re: Tandem Minicomputers

2019-09-30 Thread Jon Elson via cctalk
On 09/29/2019 11:46 PM, Jason T via cctalk wrote: Well I said no more computers I can't lift, but exotic systems keep finding me. So today we pulled a Tandem CLX out of a basement, along with a few boxes of docs, 9-track tapes and random odd and ends:

Re: PBXes at home

2019-09-24 Thread Jon Elson via cctalk
On 09/20/2019 11:12 AM, Jon Elson via cctalk wrote: On 9/19/19 7:27 PM, Ethan O'Toole via cctalk wrote: Where does one find a working 5ESS for home? 5ESS? Hmmm, you must have a pretty BIG home, no? I've had a tour of a 5ESS and it was QUITE big, like 50K square feet at least

Tek logic analyzer probes available

2019-09-24 Thread Jon Elson via cctalk
I have 6 Tek logic analyzer probes available. I have one P6464 pattern generator probe with a message about some bad channels (could have been the cable or pat gen board, too). There are 3 X P6452 analysis probes, and 2 X P6451. Anybody need any of these? Thanks, Jon

Re: PBXes at home

2019-09-20 Thread Jon Elson via cctalk
On 9/19/19 7:27 PM, Ethan O'Toole via cctalk wrote: Where does one find a working 5ESS for home? 5ESS? Hmmm, you must have a pretty BIG home, no? I've had a tour of a 5ESS and it was QUITE big, like 50K square feet at least, not counting the battery room and the cross connect frames, or

Re: PBXes at home

2019-09-19 Thread Jon Elson via cctalk
On 09/19/2019 09:27 PM, Ethan O'Toole via cctalk wrote: A number of years ago I picked up a Lucent Merlin Legend system. It was around 1999, and Lucent wouldn't certify the system for "y2k" so this business switched over to a Nortel in a giant middle finger to lucent. About 30 years ago, I

Re: phone systems, old and less-old

2019-09-18 Thread Jon Elson via cctalk
On 09/18/2019 09:23 PM, Fred Cisin via cctalk wrote: Please don't let anybody call the 25 pair 50-pin miniature ribbon connector (RJ21), "Centronics"! On Wed, 18 Sep 2019, Chuck Guzis via cctalk wrote: We used to call them "blue ribbon" connectors. I'm sure that that's also a misnomer.

Re: phone systems, old and less-old

2019-09-18 Thread Jon Elson via cctalk
On 09/18/2019 08:27 PM, Fred Cisin via cctalk wrote: On Wed, 18 Sep 2019, Jon Elson via cctalk wrote: Oh, my Gosh! the first 3 pics are of a KTU phone system. If you are OLD enough, remember the phones with 5 line select buttons and a red hold button below the rotary dial? That is what

Re: phone systems, old and less-old

2019-09-18 Thread Jon Elson via cctalk
On 09/18/2019 01:32 PM, jwest--- via cctalk wrote: I know some peeps here are phone pholks…..See www.ezwind.net/phonestuff Oh, my Gosh! the first 3 pics are of a KTU phone system. If you are OLD enough, remember the phones with 5 line select buttons

Re: Fwd: VAX + Spectre

2019-09-17 Thread Jon Elson via cctalk
On 09/17/2019 08:55 AM, Paul Koning via cctalk wrote: "Spectre" is one of two notorious bugs of modern CPUs involving speculative execution. I rather doubt that VAX is affected by this but I suspect others here have a lot more knowledge. You need an extremely high resolution timer to detect

Re: Mohawk Data Sciences 6401 Schematic?

2019-09-07 Thread Jon Elson via cctalk
On 09/07/2019 08:11 PM, Cory Heisterkamp via cctalk wrote: Hey Guys, I recently picked up an MDS 6401 Key-To-Tape unit in NCR guise to park next to my keypunches. It's been in storage for a couple decades and is in pretty decent shape. Even has a tape on it from when the university that had

Re: Shipping from Europe to USA

2019-08-24 Thread Jon Elson via cctalk
On 08/24/2019 04:06 PM, Peter Coghlan via cctalk wrote: What use is insurance? If the unique machine that you have been searching for for so long it destroyed in shipping, the insurance company pays you less than it's value It seems shippers have some label or something that identifies

Re: bit-slice and microcode discussion list

2019-08-23 Thread Jon Elson via cctalk
On 08/23/2019 12:47 PM, Noel Chiappa via cctalk wrote: > From: Jon Elson >> On 08/22/2019 12:47 PM, Tom Uban via cctalk wrote: >> On a possible related note, I am looking for information on converting >> CISC instructions to VLIW RISC. > I think it might end up

Re: bit-slice and microcode discussion list

2019-08-23 Thread Jon Elson via cctalk
On 08/22/2019 12:47 PM, Tom Uban via cctalk wrote: On 8/22/19 12:16 PM, Eric Smith via cctalk wrote: On another mailing list, someone asked if there was any list specifically about bit-slice design and microcoding. I don't know of one, so I've created a new mailing list specifically for those

Re: Shipping from Europe to USA

2019-08-22 Thread Jon Elson via cctalk
On 08/22/2019 02:09 PM, Paul Koning via cctalk wrote: Many ages ago, I worked for a company that made 12-bit computers for radiation treatment planning. they palleted a computer and shipped it to Holland for a trade show. At the arrival airport, somebody pushed it out of the cargo bay with

Re: S/23 machine update card

2019-08-18 Thread Jon Elson via cctalk
On 08/18/2019 06:38 PM, Dennis Boone via cctalk wrote: Folks, I've determined that the piece of my S/23 that's causing the power supply to blow its 12V fuse is the machine update card. The manual says this provides additional R/W storage for microprogram updates. That sounds like something

Re: Grid 1537 ”Tempest” schematics

2019-08-17 Thread Jon Elson via cctalk
On 08/16/2019 02:20 PM, Torfinn Ingolfsen via cctalk wrote: On Fri, Aug 16, 2019 at 1:16 AM Curt Vendel via cctalk wrote: The owner tried them... Grid told him the design is owned by the US Govt and only they have the technicals on it... I was just hoping someone Aha. Perhaps your friend

Re: GW-DEC-1: A New DEC Prototyping Board

2019-08-16 Thread Jon Elson via cctalk
On 08/16/2019 05:59 PM, Noel Chiappa via cctalk wrote: > From: Brent Hilpert > I've seen pieces of HP high-end lab equipment from thru the 60s that > used tin plating on the PCB edge fingers, mating into gold-plated edge > connectors on the backplane. ISTR that DEC used

Re: GW-DEC-1: A New DEC Prototyping Board

2019-08-16 Thread Jon Elson via cctalk
On 08/16/2019 08:59 AM, systems_glitch via cctalk wrote: Paul, I've got a board house I usually use, but if I can find a shop in the USA that will do hard gold plating and provide a comparable cost-per-board, I'd certainly switch! There are few board houses in the US anymore, and they are

Re: Archiving information, was Re: ADM-3A question

2019-08-16 Thread Jon Elson via cctalk
On 08/16/2019 02:50 AM, Christian Corti via cctalk wrote: On Thu, 15 Aug 2019, Noel Chiappa wrote: An additional issue, I think, is that Google is deprecating sites that use HTTP, versus HTTPS. I can't comment more, lest I start ranting at the utter Not true, in contrary, Google even crawls

Re: Pertec Interface Cable Length

2019-08-13 Thread Jon Elson via cctalk
On 08/11/2019 08:00 PM, Douglas Taylor via cctech wrote: This is where the electrical engineer could help. How do you determine how long a cable the 74LS240 can drive? Well, there are several considerations. First, it takes some current to charge up the cable capacitance. More current

Re: Pertec Interface Cable Length

2019-08-12 Thread Jon Elson via cctalk
On 08/11/2019 11:11 AM, W2HX via cctech wrote: I seem to remember they were ribbon cables with each odd/even pair twisted which probably meant one active and one ground twisted together. Or differential pairs. No, both Pertec unformatted and Pertec formatted interfaces were TTL single-ended.

Re: Pertec Interface Cable Length

2019-08-11 Thread Jon Elson via cctalk
On 08/11/2019 10:40 AM, Nigel Johnson via cctalk wrote: It's funny how licensing bodies do not recognise computer engineers. I am a member if the IEEE, but since I first wrote to the local body in 1974 they have never recognised computer engineering as a discipline. After twenty years of

Re: Pertec Interface Cable Length

2019-08-11 Thread Jon Elson via cctalk
On 08/10/2019 01:29 PM, Dave Wade via cctalk wrote: -Original Message- From: cctech On Behalf Of Mark J. Blair What term is used there for an engineer who works in fields of general electronics? An electronics engineer... This war was settled in 1963 when the American Institute of

Re: Pertec Interface Cable Length

2019-08-11 Thread Jon Elson via cctalk
On 08/09/2019 11:05 PM, Douglas Taylor via cctech wrote: I have a question about cable length - any electrical engineers in the house? Connected a Qualstar 1260 tape drive to an Emulex TC02 qbus tape controller in a pdp-11/53. The interface is pertec with 2 50 pin cables. When I use a

Re: Alphaservers for free in Athabasca, Alberta

2019-08-06 Thread Jon Elson via cctalk
On 08/06/2019 03:42 AM, Dave Wade via cctalk wrote: -Original Message- From: cctalk On Behalf Of Grant Taylor via cctalk Sent: 06 August 2019 04:25 To: cctalk@classiccmp.org Subject: Re: Alphaservers for free in Athabasca, Alberta On 8/5/19 8:40 PM, ben via cctalk wrote: Now why could

Re: MULTIPROCESSING FOR THE IMPOVERISHED Part 1: a 6809 Uniprocessor

2019-08-03 Thread Jon Elson via cctalk
On 08/03/2019 02:06 PM, ben via cctalk wrote: Many were not published. A friend built a TTL computer based on the PDP-8 but no details were published. A field service tech at a company I once worked for built a 16-bit computer that was a whole generation better than the 12-bit machines that

Re: IBM Series/1

2019-08-03 Thread Jon Elson via cctalk
On 08/02/2019 10:04 PM, ED SHARPE via cctalk wrote: Was IBM Series/1 for process control?Ed# I don't think it was necessarily DESIGNED for process control, it was a decent 16-bit mini. But, it did get USED a lot for that application. They were also used as interfaces from the IBM channel

Re: IBM Series/1

2019-08-03 Thread Jon Elson via cctalk
On 08/02/2019 09:32 PM, William Donzelli via cctalk wrote: I have a pair, plus parts. The hardware is excellent. They have fairly fast processors, and the I/O capacity is great. Reliability is typical IBM. The OS sucks balls. All the balls. Commercially, they were not a success, despite being

Re: IBM Series/1

2019-08-02 Thread Jon Elson via cctalk
On 08/02/2019 02:40 PM, Kevin Bowling via cctalk wrote: Anyone have one of these? I'd like to find a system, but images of the OS media would be interesting. I have some bits of several Series/1 systems, but no complete system at all. Jon

Re: keycaps / switches for Tek 4006

2019-07-25 Thread Jon Elson via cctalk
On 07/25/2019 07:40 PM, Fritz Mueller via cctalk wrote: On Jul 25, 2019, at 10:29 AM, Fritz Mueller wrote: I recently obtained a Tek 4006 from eBay as a repair/restoration project. It is missing a few keycaps (both SHIFT keycaps, COPY, LINE FEED, and :/*). In addition, one of the key

Re: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-21 Thread Jon Elson via cctalk
On 07/21/2019 04:48 PM, ben via cctalk wrote: It is not the DPI that is problem on some scans, but they used a LOSSY format to store the data. JPEG IS NO! Yes, ABSOLUTELY! JPEG is designed for things that have smooth tones, like people and outdoor photographs. It is horrible with anything

Re: Scanning question (Is destruction of old tech docs a moral crime?)

2019-07-21 Thread Jon Elson via cctalk
On 07/21/2019 05:16 AM, Joseph S. Barrera III via cctalk wrote: What dpi qualifies as not "crappy"? 300dpi? 400? 600? Most of the text of these documents don't need super high resolution. But, some contain hand-drawn schematics where an 11 x 17 original has been shrunk to 8.5 x 11" and

Re: Recovering the ROM of an IBM 5100 using OCR (among other things)

2019-06-27 Thread Jon Elson via cctalk
On 06/27/2019 10:30 AM, Mark J. Blair via cctalk wrote: I don't recall seeing one of those in either of the computer rooms I worked in as a student back in the late 1980s. I would love to get my hands on one (or make one?) now. One brand of a liquid you put on the tape is MagnaSee. If you

Re: Recovering the ROM of an IBM 5100 using OCR (among other things)

2019-06-27 Thread Jon Elson via cctalk
On 06/27/2019 10:21 AM, Warner Losh via cctalk wrote: Back when I got to school and I was hanging around the computer room on campus (back when it was THE room on campus with computers), I saw this half-dollar sized plastic fob on the desk and asked what it was for. The on-staff operator took a

Re: OT: the end of Dyn DNS

2019-06-27 Thread Jon Elson via cctalk
On 06/26/2019 08:36 PM, Charles Dickman via cctalk wrote: Now that Dyn has been absorbed by Oracle I need a new DNS service for my vanity domain. I welcome suggestions for a replacement provider. -chuck I use Network Solutions, they are a bit expensive, though. Godaddy also provides that

Re: unix developed on 11/20 with 20 on panel or machine that just said pdp/11?

2019-06-20 Thread Jon Elson via cctalk
On 06/20/2019 08:50 AM, Bill Gunshannon via cctalk wrote: V6 will run on an LSI-11/02 with 28KW of memory. 28 KW is 56 KBytes, which is the max on most non-MMU CPUs. Jon

Re: unix developed on 11/20 with 20 on panel or machine that just said pdp/11?

2019-06-19 Thread Jon Elson via cctalk
On 06/19/2019 08:23 PM, Bob Smith via cctalk wrote: My recollection, Unix on the 11 started with the 20 but because of the limited capabilties, it really was done on the /45. The three rings or 3 execution levels were not supported on the original machine. MMU and expanded memory would be a

Re: VAX ODT console fault

2019-06-12 Thread Jon Elson via cctalk
On 06/12/2019 03:41 AM, r.stricklin via cctalk wrote: If I install a spare KA630-A and 8 MB memory board, I get a similar fault where chevrons repeat to infinity. There are a couple possibilities. If the baud rate is set wrong, the VAX could be replying to some gibberish at wrong baud rate,

Re: What Makes a PDP-11/35 or 40 Tick?

2019-06-11 Thread Jon Elson via cctalk
On 06/11/2019 06:33 AM, Paul Birkel via cctalk wrote: I wonder what the unlisted 20 ICs are for, and what they are? I think the 23B are microcode ROMS, and the 441 seems to be clerical error. Jon

Re: M7264 Troubleshooting

2019-06-07 Thread Jon Elson via cctalk
On 06/07/2019 06:19 PM, Mister PDP via cctalk wrote: Wow, I wasn't aware that the ODT console needed memory to run. Checking on my board, it looks like the 4kw was disabled. I plugged in my 32kw module with my M8017-AA, and it fired right up to ODT without a hassle. Seems that was the issue all

Re: tape seals?

2019-06-07 Thread Jon Elson via cctalk
On 06/07/2019 01:06 PM, Chuck Guzis via cctalk wrote: On 6/7/19 8:25 AM, Jon Elson via cctalk wrote: My experience with them is that the seal bands are quite long-lasting, but the black ends that snap in tend to crack after a while. These small parts could likely be reverse engineered

Re: tape seals?

2019-06-07 Thread Jon Elson via cctalk
On 06/05/2019 06:05 PM, Stan Sieler via cctalk wrote: Hi, I think someone was looking for tape seals for 9 track tapes, a few weeks ago. If they can contact me offline, I have about 20 of varying sizes for shipping cost or local pickup. My experience with them is that the seal bands are quite

Re: DEC R80 HDA details

2019-05-31 Thread Jon Elson via cctalk
On 05/30/2019 10:56 PM, Tony Duell via cctalk wrote: [1] I feel DEC got one thing wrong here. The preamplifier ICs are inside the HDA and thus can't be replaced. This was pretty common practice in a number of drives from that period. Now, it is common for the read amps to be on the individual

Re: DEC R80 HDA details

2019-05-31 Thread Jon Elson via cctalk
On 05/30/2019 02:20 PM, shad via cctalk wrote: Hello, I'm in the process of cleaning and hopefully restore to operation of a DEC R80. The unit has some minor sign of corrosion, however it's VERY dirty, even inside the hood. The filters are obviously to be removed and replaced, as they are

Re: Process accounting - did anyone ever use it?

2019-05-31 Thread Jon Elson via cctalk
From: "Grant Taylor via cctalk" To: "cctalk mailing list" Sent: Thursday, May 30, 2019 1:30:51 PM Subject: Process accounting - did anyone ever use it? >(Credit the Quotas thread for prompting this.) >Did anyone ever use process accounting? Did they actually bill departments >(funny money)?

Re: M7264 Troubleshooting

2019-05-26 Thread Jon Elson via cctalk
On 05/26/2019 10:44 AM, Jon Elson via cctalk wrote: On 05/26/2019 12:13 AM, Mister PDP via cctalk wrote: Ok, small update. My M8043 (DLV11-J) just arrived today. It seemed in good condition so I confirmed it was set up correctly (9.6k baud and console on J3), built a serial cable from

Re: M7264 Troubleshooting

2019-05-26 Thread Jon Elson via cctalk
On 05/26/2019 12:13 AM, Mister PDP via cctalk wrote: Ok, small update. My M8043 (DLV11-J) just arrived today. It seemed in good condition so I confirmed it was set up correctly (9.6k baud and console on J3), built a serial cable from the information provided on gunkies, and put it into my

Re: IBM 1620 manuals

2019-05-25 Thread Jon Elson via cctalk
On 05/13/2019 10:57 PM, Jon Elson via cctalk wrote: I just discovered a binder with 2 IBM 1620 manuals. A quick check shows bitsavers has these and newer editions of them. So, does anybody want : IBM 1620 Central Processing Unit, Model 2 (Form A26-5781-1) and IBM 1620 Monitor II System

Re: M7264 Troubleshooting

2019-05-22 Thread Jon Elson via cctalk
On 05/22/2019 05:04 PM, Noel Chiappa via cctalk wrote: > On the LSI-11/2, with the machine stopped, 'run' was off, and the > output on AF1/AH1 was always high (i.e. not asserted). > I don't have any guesses as to what the behaviour of yours is about. Hah! Eureka! I had a

Re: Pleas ID this IBM system....

2019-05-21 Thread Jon Elson via cctalk
On 05/21/2019 04:33 PM, Chuck Guzis via cctalk wrote: How well sealed were the raised floors? Not at all. They were 2 foot squares sitting on adjustable pillars. Each pillar supported 4 tiles where they all met at the corners. You could easily slip a punch card (or credit card) between

Re: apollo psa test point adaptor

2019-05-21 Thread Jon Elson via cctalk
On 05/20/2019 05:38 PM, Carl Claunch via cctalk wrote: On 05/19/2019 09:46 AM, Jon Elson via cctalk wrote: There's a switch labeled "IRIG" which stands for Inter Range Instrumentation Group, and refers to a standard for telemetry encoding. There is a standard for time code, a

Re: apollo psa test point adaptor

2019-05-19 Thread Jon Elson via cctalk
On 05/18/2019 10:08 PM, Adrian Stoness via cctalk wrote: anyone know where i could find manual or drawings on this im up in northern manitoba canada picked it up at a rr auction to experiment with as a audio interface not sure if the jacks on the side are the weird pins nasa had or another

IBM 1620 manuals

2019-05-13 Thread Jon Elson via cctalk
I just discovered a binder with 2 IBM 1620 manuals. A quick check shows bitsavers has these and newer editions of them. So, does anybody want : IBM 1620 Central Processing Unit, Model 2 (Form A26-5781-1) and IBM 1620 Monitor II System Reference Manual (Form C26-5774-0) Jon

Re: How were 32-bit minis built in the 70s/80?

2019-05-12 Thread Jon Elson via cctalk
On 05/12/2019 10:34 AM, Tony Aiuto via cctalk wrote: Perdue also had Gorge Goble. https://en.wikipedia.org/wiki/George_H._Goble, who was a character. INDEED! I sold him a scrap refrigeration compressor which he used to prove that his proprietary mix of refrigerants would return the oil to

Re: How were 32-bit minis built in the 70s/80?

2019-05-11 Thread Jon Elson via cctalk
On 05/11/2019 06:14 PM, Warren Toomey via cctalk wrote: I'm building my own 8-bit CPU from TTL chips, and this caused me to think: how were 32-bit minis built in the late 70s and early 80s? In particular, how was the ALU built? I know about the 74181 4-bit ALU, and I know (from reading A Soul of

Re: Looking for DEC M7264-CB Troubleshooting Documentation

2019-05-09 Thread Jon Elson via cctalk
On 05/09/2019 11:57 AM, Mister PDP via cctalk wrote: Hello, As part of my H11A project, I am trying to debug my M7264-CB LSI-11 CPU module. When powered on, the CPU does not respond to the Run/Halt switch either on the front panel or via the console. I found engineering schematics for the M7264

Re: VMS versions

2019-05-06 Thread Jon Elson via cctalk
On 05/06/2019 10:55 AM, Ray Jewhurst via cctalk wrote: Does anyone know if there is a comprehensive list of changes from version to version for VMS? Wikipedia's list only shows the models that were introduced and I am more interested in the evolution of features. If anyone knows a website that

Re: Service for converting CD-ROMs into ISO files?

2019-05-04 Thread Jon Elson via cctalk
On 05/04/2019 01:38 PM, ben via cctalk wrote: On 5/4/2019 8:15 AM, Paul Koning via cctalk wrote: thought a CD-ROM (data CD) *is* an ISO image. So I would expect all you need to do is make an image copy of the disk. On Unix systems that's trivial, just use the "dd" command to copy

Re: Old CE manuals

2019-05-04 Thread Jon Elson via cctalk
On 05/04/2019 01:21 PM, Donald via cctalk wrote: Still cleaning out for Nevada move. http://www.myimagecollection.com/cemanuals/ Last 2 are interesting. 2075 Processing Unit and some Russian machine EC4001. Number sounds familiar from my eBay sojourns. Available for cost of

Re: Unknown 1970 Tapedrive

2019-04-29 Thread Jon Elson via cctalk
On 04/29/2019 02:25 PM, jos via cctalk wrote: Was given a tapedrive in rather bad condition, but it has no manufacturers name on it. Pics on ftp://ftp.dreesen.ch/Tapedrive Anyone recognizes this ? The paddle PCB says "paddle board, 7/9 level tape handler." Not even sure if it is a

Re: Nat Semi 16032 info discovered

2019-04-29 Thread Jon Elson via cctalk
On 04/29/2019 02:23 PM, Al Kossow via cctalk wrote: On 4/29/19 9:30 AM, Jon Elson via cctalk wrote: Back in 1984 I had cloned a Logical Microcomputer Co. Genix system based on the Nat. Semi. 16032 chip set. I had a dd dump of the distribution on floppies, but that was unreadable. I just

Re: Excessive amount of time in interrupt stack mode

2019-04-29 Thread Jon Elson via cctalk
On 04/29/2019 12:11 PM, Carlos E Murillo-Sanchez via cctalk wrote: Dear ccmp'ers: For a while now, I noticed that my vaxstation 4000/60 with OpenVMS 7.2 had become sluggish, but I had not had the time to investigate the problem. The system is mostly idle, RAM is mostly free (there's

Re: Nat Semi 16032 info discovered

2019-04-29 Thread Jon Elson via cctalk
On 04/29/2019 12:07 PM, Steven M Jones via cctalk wrote: PS - If anybody's got ns32k hardware, I'm interested... ;) I have a complete, wire-wrapped clone of the Logical Microcomputer Co. 16032 system, except for memory and the MFM disk. So, that's the CPU on Multibus-I, a Taisho disk

Re: Greetings

2019-04-29 Thread Jon Elson via cctalk
On 04/29/2019 06:47 AM, allison via cctech wrote: On 04/28/2019 09:28 PM, Grant Taylor via cctech wrote: On 4/28/19 6:27 PM, Ray Jewhurst wrote: I already have a Hobbyist License. I am just interested in experimenting with different OSes and different versions of OSes. ACK I don't know what

Nat Semi 16032 info discovered

2019-04-29 Thread Jon Elson via cctalk
Back in 1984 I had cloned a Logical Microcomputer Co. Genix system based on the Nat. Semi. 16032 chip set. I had a dd dump of the distribution on floppies, but that was unreadable. I just found a binder with about an inch of fanfold printouts of all the device drivers, low-level system

Re: Televideo 925 character rom dump

2019-04-23 Thread Jon Elson via cctalk
On 04/23/2019 02:23 AM, Josh Dersch via cctalk wrote: Hi all -- I'm working on a Televideo 925 terminal with a few problems, one of which is a bad character generator ROM, (a MOS 2332). Does anyone have a dump of this already, or have a working 925 they'd be able to dump the ROM from? Is the

Re: Plane of core memory

2019-04-18 Thread Jon Elson via cctalk
On 04/18/2019 03:15 PM, Noel Chiappa via cctalk wrote: > From: Jon Elson > As soon as somebody figured out that you could combine the sense and > inhibit wires, everybody immediately went to 3-wire planes. I"m suprised the idea wasn't patented. Or maybe it was, and they made the

Re: Plane of core memory

2019-04-18 Thread Jon Elson via cctalk
On 04/18/2019 04:49 AM, Brent Hilpert via cctalk wrote: It's a 4-wire 3D planar array. By topology and construction I would guess it date it from the 60s. Make that EARLY '60s. As soon as somebody figured out that you could combine the sense and inhibit wires, everybody immediately went to

Re: Pleas ID this IBM system....

2019-04-17 Thread Jon Elson via cctalk
On 04/17/2019 02:30 AM, Christian Corti via cctalk wrote: On Tue, 16 Apr 2019, William Donzelli wrote: The 3125 would likely be near impossible to get running without a full set of docs. I think I could have access to the 3125 docs (MLM, CTM, ALD etc.). At least I know where they are.

Re: ATEX PDP-11 For Sale in Houston

2019-04-16 Thread Jon Elson via cctalk
On 04/15/2019 12:08 PM, Thomas Raguso via cctalk wrote: I am selling an Atex PDP-11/34. The computer has: J11 CPU, 11 MB RAM, 2 BA11-LE expansion chassis, a second backplane, an SMD disk controller and LAN hardware. 11 MB ram on a PDP-11? Is that possible? Also, was the J11 used in the

Re: Interesting article in Spectrum about IBM's System/360

2019-04-13 Thread Jon Elson via cctalk
On 04/13/2019 09:11 AM, Jay Jaeger via cctalk wrote: For example, the IBM 7010 was an IBM 1410 done up in 7000 series technology (and was a compatible super-set of the 1410 and, via a toggle switch, the 1401). It had no architectural relationship with the 7090/7094, nor did the 7070 or 7080,

Re: Interesting article in Spectrum about IBM's System/360

2019-04-12 Thread Jon Elson via cctalk
On 04/12/2019 04:14 PM, Chuck Guzis via cctalk wrote: On 4/12/19 11:15 AM, Eric Smith via cctalk wrote: The article says: Poughkeepsie’s engineers were close to completing work on a set of four computers known as the 8000s that were compatible with the 7000s. My tendency has been to consider

Re: Interesting article in Spectrum about IBM's System/360

2019-04-12 Thread Jon Elson via cctalk
On 04/12/2019 12:41 PM, Carlos E Murillo-Sanchez via cctalk wrote: Building the System/360 Mainframe Nearly Destroyed IBM https://spectrum.ieee.org/tech-history/silicon-revolution/building-the-system360-mainframe-nearly-destroyed-ibm Yup, they bet the company on a new product. it was a

Re: Daisywhell typewriter emulating a TTY

2019-04-10 Thread Jon Elson via cctalk
On 04/10/2019 03:38 AM, GerardCJAT via cctalk wrote: I would like to emulate a TTY, using a daisywheel typewriter. Well, there are Qume and Diablo. Diablo was bought by Xerox, so some of them carry that label. Most of the stand-alone versions had serial (RS-232) ASCII interface. Jon

Re: Tape Storage Rack WAS: RE: 1/2" tape storage.

2019-04-09 Thread Jon Elson via cctalk
On 04/08/2019 11:34 PM, Ali via cctalk wrote: While on the subject of tape storage anyone know if it is still possible to get desktop/table top wire bins to hold tapes in canisters and/or reels? Not that I have that many tapes or anything like that. This would be more for display purposes

Re: %20Storage%20for%201/2"%20open%20reel%20tape

2019-04-09 Thread Jon Elson via cctalk
On 04/08/2019 10:26 PM, Adrian Stoness via cctalk wrote: whats with the weird tag on this thread? %20 is an escaped form of the space character. Some mail programs escape all control characters, or even anything like {} ~. Jon

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