Re: seeking Motorola M68MM01A2 documentation

On 19.01.22 13:15, Jonathan Chapman via cctalk wrote: That's a neat board! Where can I/we order one? With me... 20 Eur for the set of 2 + shipping. If you are in the US it is probably cheaper to order new ones locally. Note that I never completed the documentation or wrote the code for the

Re: TU58 / DECtape II: Capstan goo

which Innoflex filament? There are several different hardness variants. I used Ninjaflex 3DNF0517505, but that is because it is the only TPU type filament I have at hand. I would rather use a somewhat harder variant. Jos

Re: TU58 / DECtape II: Capstan goo

Also, when the tapes arrive, are there recommendations in case their drive belts are gone? You can 3D-print replacements. Use Innoflex filament, 100% fill-in and the following OpenScad formula : module ring(d1,d2,w) { difference() { cylinder( w, d1/2, d1/2, $fn=230); cylinder(

Re: Micropolis 1525 stuck heads

On 22.09.21 13:46, Jules Richardson via cctalk wrote: On 9/20/21 1:13 AM, Chris Zach via cctalk wrote: Running it through the MFM tool got all but 200 or so sectors on the first pass, most errors were on head 3 but tapered off after cyl 500. Seems like a normal copy of Accent, no special

Re: head alignment tape

On 30.03.21 21:13, Curious Marc wrote: Can’t see the web page, it’s blocked. But yes, I could definitely use an alignment taoe. Marc Sorry all, Did not realize that site was geoblocked, it is some sort of local (i.e. Swiss) Craigslist. I will not copy the whole advert, but this is

head alignment tape

Does this head alignment tape need saving ? https://www.tutti.ch/de/vi/zuerich/computer-zubehoer/komponenten-zubehoer/5-stk-vintage-computer-tapes-memorex-pericomp-etc/43582741 I'd be inclined to think that the alignment tape would suffer to same issues as all old tapes, but then this is

Re: Help with PCB ID

On 13.03.21 20:43, Cory Heisterkamp via cctalk wrote: I’m wondering if anyone recognizes this PCB. Double-sided, 74xx vintage, measuring 14”x15”. There’s a “B.I.” logo in one corner, but no google match. IC date codes are ’77/’78 vintage. There’s a pair of DB-25’s, a BCD encoder, and for

Re: Wagner WAC40

On 13.03.21 09:17, Joshua Rice via cctalk wrote: Hi, I recently bought a core rope memory unit from a Wagner WAC40, mainly because it’s very aesthetically pleasing and looks good on display: https://i.redd.it/h9sb550uhnm61.jpg However, i can fine very little about Wagner Computer, the WAC40

Stride computers, was Re: Rod Coleman's personal history of founding, building & running SAGE

On 03.01.21 01:11, Liam Proven via cctalk wrote: This may be old news -- it was new to me, though. https://suddendisruption.blogspot.com/search/label/Booting%20Sage%20Computer The story is around for several years already, but yes : interesting read indeed. Speaking of which : I am

Re: Unknown 1970 Tapedrive

On 29.04.19 22:28, Chuck Guzis via cctalk wrote: On 4/29/19 12:56 PM, Jos Dreesen via cctalk wrote: 1970, also all TTL is dated 1969 or 1970. Jos That would fit right in with a key-tape scheme. Can you tell if the capstan motor is a stepper? --Chuck I put up some more pics (Tapehead

Re: Unknown 1970 Tapedrive

What's the date on the paddle board? Could almost be a key-to-tape drive. --Chuck 1970, also all TTL is dated 1969 or 1970. Jos

Re: Unknown CDC unit , looks like a drum memory ?

On 16.05.2018 20:00, Al Kossow via cctalk wrote: Honeywell Level 66 CP http://ana-3.lcs.mit.edu/~jnc/tech/multics/jpg/L66CPUL.jpg That seems to be spot on... What a beast this machine was.. Jos

Re: Unknown CDC unit , looks like a drum memory ?

On 16.05.2018 19:13, Ed Sharpe via cctalk wrote: OK  I  see there is a  mix  of  photos in this  directory! some  tape  reader  some  drum  2  separate  topics. My mistake, sorry, that papertape reader was of course obvious. Removed that pic. Added 4 more, that are from some frontpanel

Univac 9400 panel ( Was:Re: Will be up for sale in this calendar year 360 Front Panel)

On 22.02.2018 18:56, Pete Lancashire via cctalk wrote: I thought I would post a heads for https://photos.app.goo.gl/36CxlZQJDssj5uLh1 I have the IBM 360 aluminum plate that goes on top, it is scratched. More detailed and better pictures as I dig deeper. ...and if someone needs a nice Univac

Re: Can you run Apple Lisa Workshop and LIsa OS on the same Hard-drive?

On 28.01.2018 16:25, Adrian Graham via cctalk wrote: On 28 Jan 2018, at 11:09, corey cohen via cctalk wrote: Or do I need an external profile for my 2/10 if I want to still use LOS. One alternative is to go for an IdeFile : my Lisa has a 260MB IDE harddisk, seven

Re: Tek 40xx computer users

On 07.01.2018 07:01, Randy Dawson via cctalk wrote: This was for Mike Hass, he was not in the email chain, and I do not have his address. But it' s a general shout out to the other Tek 40xx users out there... There are a number of us over and the vcfed forum, someone just brought his

Re: To the 2901 bit slicers out there

On 28.12.2017 05:35, Randy Dawson via cctalk wrote: Since I know there's tons of PDP/11 geniuses here, and other gurus with a NOVA 4, and a Tektronix 4052 guy (I have the 4051): What have you done, with microprogramming this part? In your architecture, have you changed the microcode,

Re: That Tek 405x QIC Tape.

On 03.10.2017 16:59, Al Kossow via cctalk wrote: On 10/3/17 2:50 AM, Jos Dreesen via cctalk wrote: That "famous" QIC tape unit Tektronix 405x tapes aren't QIC They are 3M DC series cartridges, but the encoding is not a QIC standard. The problems, alas, are the same.

That Tek 405x QIC Tape.

That "famous" QIC tape unit ...has been talked about a lot, still some things are still not clear to me. Baking : is this a last-resort means of reading some valuable tape, or a means to restore them for a further few years of usage ? I intend to bake mine before usage, although a few

Re: Flex Disc options for the HP 9825

On 13.08.2016 11:37, Rik Bos wrote: For what it's worth a small warning about the HP 9825 series computers. The power supply doesn't have a crowbar(over voltage protection), so a transistor failure in the Psu can be catastrophic. On the other hand the two 9835's I have, which uses the same form

Re: classics I threw away or sold ... foolishly

- Gave away a PDP 8/F for free - Sold a Tektronix 31 which I now regret. - Did not take a free Apollo DN1 and an also free PDP11/44, both because of space constraints. - Had to leave around 7 Philips P856/P857 minis in the trash, only kept one and the core memories of the others But then

Raised flooring available ( Switzerland / Europe )

A local reseller has a good supply of secondhand raised flooring available, for 7 USD per square meter, which I believe is a very good price. Not affiliated etc etc, just giving a heads up on stuff that is not easy to find. Look for it on Ricardo.ch Jos

Re: DEC RK05 Emergency Retract Batteries

On 16.03.2016 09:12, Christian Corti wrote: On Tue, 15 Mar 2016, Paul Koning wrote: From the various comments, it sounds like NiMH is a useable substitute. On the other hand, NiCd batteries are still readily available. Yes, but NiCd cells really don't like being charged only and never

Re: Looking to buy a Tektronix 405x computer.

On 22.02.2016 00:35, Ian Finder wrote: I've been looking for one of these for ages- I have a lead on a TeK storage tube terminal and will make a trip for it as soon as I can, but I'd love to find one of the computers. I'll pay for one in any condition and shipping from anywhere I can find one.

Re: Diser/ETH Lilith - was Re: pdp11/04 : the pics....

Diser/ETH Lilith modula 2 machine. Boring exterior, very interesting inside & software wise. That is a real gem. I've only ever seen the chassis inside a glass case at ETH. Want to tell us more about yours? Does it run? It used to run, until I broke it during VCFe in 2014.. They were

Re: pdp11/04 : the pics....

- Impressive collection of great machines! A mere token effort, compared to yours ! My apologies for not recognizing the "pride_of_collection". Tell about it. Diser/ETH Lilith modula 2 machine. Boring exterior, very interesting inside & software wise. but never found the "4

Re: The PDP11/04 has landed..

On 07.02.2016 22:49, Jay West wrote: Jos wrote... -- restoration is to start next winter, after a house move which will nearly double working area for the hobby. -- Bhahahahaha From experience... it will never be enough space. Double it again. Still won't be enough. These

The PDP11/04 has landed..

Yesterday I picked up the PDP11/04 that Jay mentioned a few days ago. Less than 15 miles from home ! The machine spend its early days as a processor in chemical analysis apparatus, and was subsequently bought by the employee using it. Before he could make use of it better, more powerful,

Re: Oberon and the OberonStation (retro-style FPGA computing)

On 02.12.2015 15:04, Liam Proven wrote: On 24 November 2015 at 08:45, Mark Wickens wrote: Thanks for letting us know about this William - I'm sure there is still plenty of interest in Oberon, Modula-2, Modula-3 and other derivatives. Was there ever an ARM version?

Re: 8" hard disk storage for unibus 11?

On 26.11.2015 10:08, Mike Ross wrote: Many moons ago I had a small fleet of pdp-11/04s, pulled out of a research synchrotron. (well, not *literally* out of the synchrotron, they probably wouldn't work if they had been...) They all had disk subsystems made by a company called Baydel; a 19" rack

Re: WD9000 Pascal microengine schematics available

On 09.11.2015 15:11, Al Kossow wrote: On 11/9/15 6:04 AM, Brad Parker wrote: I was wondering about software. Is anyone planning to turn those schematics into verilog? Help would be nice reverse-engineering the chipset. I also picked up some of the Russian versions of the instruction

Re: WD9000 Pascal microengine schematics available

On 09.11.2015 20:15, Eric Smith wrote: On Mon, Nov 9, 2015 at 7:04 AM, Brad Parker wrote: I was wondering about software. Is anyone planning to turn those schematics into verilog? I'm working on dumping the microcode. Your post overlapped with mine... The WD9000

Re: WD9000 Pascal microengine schematics available

Eric Smith and I have been looking for these for a long time. They are BASF floppies, though. As are mine... ( some 3M and CDC disk also part of the haul ) Does that mean they will need baking ? Jos

Re: VT52s, VT61s lots of DEC and DG keyboards- return trip through Maine, MA, NY, PA, OH, IN to IL

please. Has anyone ever seen one? I had an idea it used a silvered-paper and burned it off? or am I mis-remembering. I'm seeing one right now, as my VT52 has such an unit. Never seen one in action though. I can put up some pics if desired, let me know what you need. Jos Dreesen

Codex 6000 intelligent network processor ?

Is this something a classicmp'er should be interested in ? What is it anyhow ( since it seems to predate ethernet ) Jos

Codex 6000 intelligent network processor ?

Is this something a classicmp'er should be interested in ? What is it anyhow ( since it seems to predate ethernet ) Jos