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101090 discussions

Using a DEC RM80 as a Massbus -> SMD interface

by ian.finder＠gmail.com

Hi folks, I recently picked up a DIGITAL RM80 drive. >From what I've read, this is a SMD drive based around the R80 HDA, with a massbus to SMD bridge. I have identified this component and the outputs indeed look like SMD. Is there a way to use this as a SMD controller with 3rd party drives? How would you format or set geometries? Does anyone have more information about the RM80? Thanks, - Ian -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

9 years, 8 months

Tek 4405/4406

by aek＠bitsavers.org

Things went well reading the floppies. Everything should be uploaded by noon PDT. There were bits of the system and smalltalk for the 4405/6, so it would be nice if someone might have one of these to dump the firmware, though there probably isn't enought to boot one. checked with http://www.chiark.greenend.org.uk/~pmaydell/hardware/ramoth/ about the 4406 he had, but it's long gone. maybe someone on the list here got it. few interesting links FTR http://ana-3.lcs.mit.edu/~jnc/cctalk/1998-January/0399.html archived from here mentions a 441x line that ran uTek, that I never heard of and http://www.wirfs-brock.com/allen/things/smalltalk-things/tektronix-smalltal… the history of the machines

9 years, 8 months

Commodore C2N datasette belts (was Re: Classics long overdue a Boot.)

by ethan.dicks＠gmail.com

On Thu, May 19, 2016 at 7:11 PM, Adrian Graham <witchy at binarydinosaurs.co.uk> wrote: > Last ones?! EVAR?!1one. Horrors. Don't tell Modern-Radio-Bolton otherwise > the belts I bought recently for my Commodore C2N/1530s etc might evaporate > in a puff of logic Do you have the dimensions on that belt handy? All of my Commodore tape drives are erratic due to aged belts. I can't get good reads and I have some PET Rabbit-format tapes to read (long ago, I digitized my standard CBM tapes). I'll likely order from this side of the pond, but I just need to know what size(s) work(s). -ethan

9 years, 8 months

Finally! Opened my TeleVideo TPC-1

by isking＠uw.edu

Hi all, A while back I asked if anyone knew how to open the case of this early luggable, and there were crickets. Well, I pulled it out today with the intention of poking and prodding, and I magically got it to open! There's a top piece that is fastened to the front bezel with two apparent screws. But it is also snapped in to the rear cover in a manner that is not readily apparent or discernable. If one removes two screws at either end of the rear cover, the rear piece will cantilever back ever so slightly, and the latching of the plastic pieces will separate without damage. The power supply assembly is fastened to the bottom of the case with a couple of screws that come up from below/outside, so I'd already removed those. It should be relatively simple to rotate the assembly so that I can remove the screws holding the PCB to a backpiece, providing access to the PCB so I can replace the 30+ year old electrolytics. Given the symptoms, this seems like the most likely root casuse.... -- Ian -- Ian S. King, MSIS, MSCS, Ph.D. Candidate The Information School <http://ischool.uw.edu> Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical Narrative Through a Design Lens Archivist, Voices From the Rwanda Tribunal <http://tribunalvoices.org> Value Sensitive Design Research Lab <http://vsdesign.org> University of Washington There is an old Vulcan saying: "Only Nixon could go to China."

9 years, 8 months

Fwd: [GreenKeys] Digital Decwriter III (DEC LA120) - Complete - FTAGH

by couryhouse＠aol.com

Someone needs to grab this ?.... heads are hard to get...? Sent from my Verizon Wireless 4G LTE smartphone -------- Original message -------- From: "Mark J. Blair" <nf6x at nf6x.net> Date: 5/30/2016 1:42 PM (GMT-07:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Fwd: [GreenKeys] Digital Decwriter III (DEC LA120) - Complete - FTAGH Forwarded with permission of the author: > Begin forwarded message: > > From: David Tumey via GreenKeys <greenkeys at mailman.qth.net> > Subject: [GreenKeys] Digital Decwriter III (DEC LA120) - Complete - FTAGH > Date: May 30, 2016 at 13:18:30 PDT > To: GREENKEYS BULLETIN BOARD <greenkeys at mailman.qth.net> > Reply-To: David Tumey <davetumey at yahoo.com> > > Free to a good home: > > Digital Decwriter III - LA120 - Complete.? The machine is located in a storage unit in Beavercreek, OH (Near Dayton/Fairborn/Huber Heights). > > The machine is 100% complete and I saw it actually working in 1994 when it was taken out of service - it has been in storage since. > > Excellent source of hard-to-find parts:? Power supplies, print head, keyboard, PCBs, cover parts, motors, pulleys, bearings, etc.? Possibly even restoration. > > Let me know if you are interested off-list and I will put you in touch with my son to make the arrangements for pickup. > > thanks. > --dave > W5DT -- Mark J. Blair, NF6X <nf6x at nf6x.net <mailto:nf6x at nf6x.net>> http://www.nf6x.net/ <http://www.nf6x.net/>

9 years, 8 months

Fwd: [GreenKeys] Digital Decwriter III (DEC LA120) - Complete - FTAGH

by nf6x＠nf6x.net

Forwarded with permission of the author: > Begin forwarded message: > > From: David Tumey via GreenKeys <greenkeys at mailman.qth.net> > Subject: [GreenKeys] Digital Decwriter III (DEC LA120) - Complete - FTAGH > Date: May 30, 2016 at 13:18:30 PDT > To: GREENKEYS BULLETIN BOARD <greenkeys at mailman.qth.net> > Reply-To: David Tumey <davetumey at yahoo.com> > > Free to a good home: > > Digital Decwriter III - LA120 - Complete. The machine is located in a storage unit in Beavercreek, OH (Near Dayton/Fairborn/Huber Heights). > > The machine is 100% complete and I saw it actually working in 1994 when it was taken out of service - it has been in storage since. > > Excellent source of hard-to-find parts: Power supplies, print head, keyboard, PCBs, cover parts, motors, pulleys, bearings, etc. Possibly even restoration. > > Let me know if you are interested off-list and I will put you in touch with my son to make the arrangements for pickup. > > thanks. > --dave > W5DT -- Mark J. Blair, NF6X <nf6x at nf6x.net <mailto:nf6x at nf6x.net>> http://www.nf6x.net/ <http://www.nf6x.net/>

9 years, 8 months

Xerox Star install floppies

by dave＠661.org

Over the past six months or so, I've been selling install floppies for the Xerox 8010 Star. I had no idea if I had a full set or not. I'd just put together a set of as many unique floppies that I could find from my stash. Then last week I was asked if I had a full set. This person then stated that Al Kossow might or might not have a full set. In any case, it's not on Bitsavers. Al expressed interest in a set that I offered a couple months ago, but he never followed up on that. So, would someone please confirm the existance of a full set of install floppy images for the Xerox 8010 Star somewhere? The floppies I have left are these: ViewPoint 1.1 (file check) ViewPoint 1.1 (essential applications) ViewPoint 1.1.6 Common Software ViewPoint 1.1.2 Local RS232C Communications Access -- David Griffith dave at 661.org 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?

9 years, 8 months

Monster 6502

by tmfdmike＠gmail.com

On May 29, 2016 2:44 PM, "Noel Chiappa" <jnc at mercury.lcs.mit.edu> wrote: > > > From: drlegendre > > > Gawd, what a lovely piece of work that man hath wrought! > > I love the term he invented for it: "dis-integrated circuit"! :-) > > > Good FAQ page here: > > http://www.monster6502.com/ > > My favourite entry: > > "Q: Are you nuts? > A: Probably." > > Clearly a person after our own hearts! :-) > > Noel I'm sure I read of someone who was implementing an entire CPU as discrete components on an even larger size... there were racks of the thing; it took up most of a room. But I can't find the link.... Mike

9 years, 8 months

Tektronix 4404 servcie manuals needed

by g-wright＠att.net

I would like to get a Tek 4404 computer going but lack any service manuals. The system turns on but has no curser on the screen. Has good power from the Power supply and heater is on in the CRT. Has a row of LEDs on the mother board. Does anyone know how to read these. - Thanks, Jerry

9 years, 8 months

http://hackaday.com/2016/05/29/dragging-teletypes-into-the-21st-century

by COURYHOUSE＠aol.com

it converts codes send and recv... 5 to 8 8 to 5? can preprogram messages in stand alone mode and more... when I see things like this and giant 6502 my faith in things is renewed.... ed In a message dated 5/29/2016 6:52:04 P.M. US Mountain Standard Time, jws at jwsss.com writes: This is from what I see attempting to run a TTY from a system. As to the second, the tangent the author puts in is wrong, I don't know if an ASR33 can run 5 level easily, but all I've ever used are ascii 8 bit machines. thanks Jim

9 years, 8 months

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