- test-drb@ccmp.vtda.org - classiccmp.org

by cc＠informatik.uni-stuttgart.de

Hi, I have another frontpanel, this one is from Plessey Peripheral Systems and must come from a 16 bit system. It's only the board with LEDs and switches. Does anyone know the system this panel comes from? http://computermuseum.informatik.uni-stuttgart.de/pics/temp/plessey_fp.jpg Christian

9 years, 2 months

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VCF East pictures

by cctalk＠snarc.net

VCF East XII was held March 31-April 2. Around 500 people were there. Adam Michlin's pictures: http://ceos.io/vcf/east/ Dave Riley's pictures: http://oscar.the-rileys.net/VCF%20East%20XII%20Photos/ Dan Roganti's pictures: http://www.rogtronics.net/blog/?page_id=730 Mike Loewen's pictures: http://q7.neurotica.com/Oldtech/VCF-East2017/ Herb Johnson's pictures: http://www.retrotechnology.com/vcfe12/vcf_east_2017.html ________________________________ Evan Koblentz, director Vintage Computer Federation a 501(c)3 educational non-profit evan at vcfed.org (646) 546-9999 www.vcfed.org facebook.com/vcfederation twitter.com/vcfederation

9 years, 2 months

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DEC wall plates, cables

by w9gb＠icloud.com

Paul, Are these the "offset clip" RJ-12 6p6c modular jacks? https://www.showmecables.com/dec-rj12-6p6c-modular-plug-flat-cable greg chicago Sent from iPad Air

9 years, 2 months

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DOS-11/BATCH-11 manuals on Ebay

by mattislind＠gmail.com

http://www.ebay.com/itm/361940854169 One of them does not seems to be at bitsavers. The shipping is way to high to have them shipped to Sweden and scanned. Maybe someone in the US would care to buy and scan it? /Mattis

9 years, 2 months

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RIP: Daniel Bobrow

by sieler＠allegro.com

Re: > From: Tony Aiuto <tony.aiuto at gmail.com> > Subject: RIP: Daniel Bobrow > > http://www.legacy.com/obituaries/nytimes/obituary. > aspx?n=daniel-bobrow&pid=184794881 I worked with Danny for about a year, around 1974, sometime after UCSD put its B6700 onto the ARPAnet (we were something like the 35th computer). The AI community needed a BBNLISP with more addressing space than a DEC-10 could provide, so they came to the king of virtual addressing: the Burroughs. We got the contract to implement BBNLISP, and Danny came to oversee. I remember him typing on a terminal, linking UCSD to about 10 other computers on the ARPANET, finally linked back to us ... sending a message to himself. He was demonstrating the lag time each computer added :) IIRC, sometime during the project, BBNLISP was renamed INTERLISP. I still have the wonderful manual, with the great artwork on the cover. Warren Teitelman (the author) doesn't have his name on the cover. But, the bottom portion has a guy is operating a meat grinder, with the input being the letters of "reference manual" in random order, and the output being "reference manual". Danny explained that Warren Teitelman hadn't gotten the joke :) Danny was funny, quick witted, friendly ... RIP. Oh, UCSD LISP? About a week before we released it, DEC (or BBN?) had a breakthrough and increased the addressability of their virtual memory, obviating the need for our version :( Stan Sieler > >

9 years, 2 months

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DEC wall plates, cables

by useddec＠gmail.com

Your chance to use real DEC wall plates!!! While going through boxes of stuff in the basement, I found a few cases of DEC wall plates and Adirondack Wire and Cable AWC8100-14-W cables, both sealed in factory bags. There is no H # on the wall plates,but I recall seeing them in DEC sales catalog The cables look like RJ11 and I'll try to open one and measure it tomorrow. Contact me off list if you are interested in making an offer. Shipping from 61853, and as many as you want $10 S&H in US.

9 years, 2 months

2
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IBM System/32 and System/3 Manuals available

by curiousmarc3＠gmail.com

Jay Herde, a viewer of my YouTube channel, contacted me to say that he has the following available that he would like to get rid of: IBM System/3 Disk Concepts and Planning Guide. IBM System/3 RPG II Disk File Processing Programmer's Guide. IBM System/3 Models 8 and 10 Disk System Control Programming Reference Manual. IBM System/32 Operator Training Student Text. IBM System/32 Displayed Messages Guide. He should be cc'ed above but I am not sure if his email we will make it through. Contact me off list if you are interested and I'll put you in touch with him. Marc

9 years, 2 months

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New Jonathan Coulton text adventure/classic terminal music video

by tshoppa＠wmata.com

Yes, I know the video was made by using ?retro-terminal? software http://www.secretgeometry.com/apps/cathode/?<http://www.secretgeometry.com/apps/cathode/> on modern hardware, but the spirit of the Infocom games is still there : https://www.youtube.com/watch?v=TvVNxqosZ7s The spot halfway through where the screen matches the lyrics is really cool. I seem to recall the Infocom games could ?pace? with realtime delays in the text scrolling but that may be mis-remembering things. Tim.

9 years, 2 months

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SimH PDP-8 simulator plays music

by kylevowen＠gmail.com

I suspected that I could somehow get some music out of the SimH PDP-8 simulator for a while now, if I could only make it run real time and toggle a GPIO pin fast enough say, on a Raspberry Pi. That may still be doable in the future, but I also had a suspicion that I could generate music not in real time. I finally got around to trying out my idea last night. A few lines were added to pdp8_cpu.c to spit out the elapsed instruction cycles every time a CAF instruction is executed, the default "noise" instruction in the MUSIC.PA program. That's all I did to the simulator. I then ran MUSIC with a given .MU file and watched as many integers are spit out onto the screen. These were copied and pasted into a new text file and saved. The rest of it is in a single C program that I cobbled together. It reads in this new text file and generates a series of pulses as an array of floats. Each interval is about 1.93 microseconds, which I calculated to be the average number of pulses for the music program to be "in tune" with A=440 Hz, plus or minus. This value is subject to change, particularly as the notes get higher in frequency, but only by perhaps 6% or so from my experiments. One detail to note is that per the recommendation of the MUSIC.PA manual, these pulses are extended to roughly 6 microseconds, or three time intervals in my program. This array of floats is then downsampled use libsamplerate to 44.1 kHz (from 1/1.93 microseconds, or roughly 520 kHz) and output to a canonical WAV file, 16-bit single channel. What do you know, it worked! Here's a sample: https://www.youtube.com/watch?v=_urDcyluX9c My code can be found here, for those interested: https://github.com/drovak/music Presumably, this technique could be used to generate music from any given computer simulator. Thanks, Kyle

9 years, 2 months

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DOS-11/BATCH-11 manuals on Ebay

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > One of them does not seems to be at bitsavers. That's on my list of items to get. I have a page-feed scanner, so will easily be able to scan this (although I'll have to get some instruction on exactly what incantation to use to Acrobat to turn the TIFF's into a PDF; apparently "PDF/A", supposedly for archival purposes, is apparently not in fact desirable for that). Noel

9 years, 2 months

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Microcomputer and misc for sale

by lyokoboy0＠gmail.com

Many people have been asking for details on the Hp gear. Here are some pictures of everything. https://postimg.org/gallery/wdgbt8lm/ I have powered up the machine and it boots up to hp basic. I never fired up any of the external drive enclosures or the printer. If someone wants to tell me how to test the external drives, I am more than willing to do so to verify that they are in working order. I have gotten several inquiries on the HP gear. Not sure how to handle many people wanting the same gear, now that i have some pictures up showing the model numbers, ill see if people are still interested and what they are willing to offer. --Devin

9 years, 2 months

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DEC PDP-14 Programmable Controller simulator

by chd＠chdickman.com

I have written a PDP-14 simulator using the simh framework. Paired with a PDP-8 simulator as a front end it passes all the DEC diagnostics. A pointless effort, perhaps, because there isn't much that can be done with it without connecting it to something to control. In the course of research, I saw that there was an option to replace the braided core ROM that was standard, with a R/W core memory. It used a 4k memory module from the PDP-11 (MM11-E) with a special interface module in the PDP-14. I can find no documentation for the interface other than the wire-wrap list for the slot in the PDP-14 that it went into. From the signals available I have not been able to reverse engineer the instructions used to write the core or any detail really on how it might have been used. The option was MM14-A consisting of an interface (M7407), memory (MM11-E), chassis, and power supply. If anybody is still reading, I would be very interested in ANY information about it. -chuck

9 years, 2 months

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TRS-80 file extensions

by trash80＠internode.on.net

I've been trying to put together a list of file extensions (and a one liner about that file extension) used by TRS-80's (including all the XZ-80 machines, CoCo's, the 8" machines, pocket computers, the 100's. MC-10's etc). Google has been my friend but has only turned up a few answers. I was wondering if anyone has seen something more comprehensive or even has something more comprehensive. Thank you!! Kevin Parker P: 0418 815 527

9 years, 2 months

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Univac I memory tank

by jnc＠mercury.lcs.mit.edu

> From: Dwight Kelvey > I need on of those. I think it belongs in a museum, actually. Provided they can make it work, of course! :-) I wonder how many working delay line main memories are left in the world? Noel PS: Sorry about the previous mostly-duplicate message; I hit the 'interrupt' key and it did the wrong thing.

9 years, 2 months

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KDJ11-B PDP 11/73 getting stuck in Exit standalone mode diag #56

by Mark＠Misty.com

Hi, I picked up an empty 4x8 Q-bus chassis at VCF-East this year. It's labelled "USDC CSS-823 Processor System" on the outside. It's not a DEC backplane, but the chassis is light aluminum, smaller and in some ways nicer than my pile of BA23s. It includes a switching power supply, LTC and q-bus termination, and I confirmed it's wired for Q22. I was hoping to transplant an 11/83 into it, since it will fit more comfortably in my work area. It has lit DCON/RUN/LTC/HALT buttons on the front pane. The etching on the backplane says something like "MDB Systems, Inc. East Orange, CA 92665" Unfortunately, I discovered slots are all wired Q22/Q22, no top ABCD (Q22/CD) PMI slots like a BA23. So, not good for an 11/83 CPU wired for PMI on slots C-D. So, I was hoping I could get my KDJ11-B (quad-wide 11/73) running in it. Upon power up or reset I get "Testing in progress. Please wait" on the serial console, and the LEDs get stuck on test 56. CTRL-C doesn't do anything yet, and my only options seem to be to hit reset, or if I hit the run/stop toggle, I can reset to the ODT prompt. This is with either just the KDJ11-B in the top slot, or with the addition of a suitably configured MSV11-QA in the next slot. If I turn off the LTC on the front panel, I get the expected Error 61 M8190 clock error, PC and register values, and options to re-run once or loop on test, so I know the LTC is working. I confirmed the KDJ11-B works fine in a BA23, getting past test 56. I also tried an 11/53 CPU here in the ABAB backplane and that gets past the self tests into dialog mode, but I really would like to get the KDJ11-B working in this chassis. I do see that a couple traces to the KDJ11-B C-D slots besides the Grant Continuity connections. I assume since the KDJ11-B has those Grant Continuity connections on slots C-D, it can run in a qbus/qbus Q22/Q22 quad Q-bus slot. I noticed the FP "RUN" lamp never comes on (and is not burned out), but maybe that's normal -- monitoring something on the bus that doesn't happen during power on self test. Does anyone here have suggestions about next steps in diagnosing this? https://archive.org/stream/bitsavers_decpdp1111aintNov86_5833755/EK-1184A-M… ----------------------------------------------------------------------------- 4.10.18 Exit Standalone Mode (Test 56) In the 22-bit mode, the exit standalone mode is checked by using the guaranteed timeout address of 17 760 000 to verify that the timeout logic works without hanging up the CPU. ----------------------------------------------------------------------------- -- Mark G. Thomas (Mark at Misty.com), KC3DRE

9 years, 2 months

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Info Needed: DATARAM DR-111 PDP-11 Unibus 16KW Core Memory

by jnc＠mercury.lcs.mit.edu

> From: Steven Malikoff > I've scanned the full version of this manual that comprises the > installation guide, description, system specifications, theory of > operation, timing chart, full schematic and manifest. Oh, wow! You get the Documentation Preservation Gold Star! A needed, and useful, manual. Thanks very much for doing this. Noel

9 years, 2 months

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Info Needed: DATARAM DR-111 PDP-11 Unibus 16KW Core Memory

by steven＠malikoff.com

Systems Glitch said > Looking for any information and/or documentation on DATARAM DR-111 (assembly > 61101) 16Kx16 core memory boards for the Unibus. I've got four in unknown > condition, one with a clearly destroyed 8T37. > I have a large format scanner with ADF and can digitize print sets if necessary. > Thanks, > Jonathan For anyone else that may be interested, I've scanned the full version of this manual that comprises the installation guide, description, system specifications, theory of operation, timing chart, full schematic and manifest. I believe there is a DR-111 document floating around that is the installation guide only, hence the reason for this new scan. You can find it at http://web.aanet.com.au/~malikoff/pdp11/DATARAM_DR-111_core_memory_board.pdf It's about 6Mb. I have a stack of other docs to be done from my road trip to recover the FOX 2/10 last year, including the PDP-11/15 print set. Steve.

9 years, 2 months

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Old manuals (Univac, IBM, Burroughs, Teletype)

by dave＠babcock-family.org

Hello Todd, I am a volunteer at the Computer History Museum. I led the museum's full restoration of an IBM 1620 several years ago (http://s3data.computerhistory.org/core/core-2001-03.pdf). I am currently leading a new effort, the /IBM 1620 Jr./, to create an operational, hands-on exhibit using a real IBM 1620 front panel driven by a Raspberry Pi. As part of that effort, I'm writing a new, cycle-level simulator. The existing simulators, like SimH, are instruction-level and cannot drive the front panel. The simulator work could greatly benefit from the IBM 1620 & 1622 manuals and system diagrams that you have. I'd be happy to pay for any shipping costs. When this project is complete, the manuals will be donated to the museum to add to their collection of IBM 1620 documents. Thanks, Dave Babcock

9 years, 2 months

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Microcomputer and misc for sale

by lyokoboy0＠gmail.com

Looking to make some space so i can work on some of the bigger gear i have sitting around here. All this stuff was stored in a climate controlled environment. I pick up interesting things whenever i can, be it at the scrapyard, flea markets, etc, that is where most of this came from. I worked in a computer shop for a while, a lot came from customers too, You would be supersized what people would drag in.Fix it up... interest fades, and then it starts looking like a museum. 3-4 commodore 64's. many 1541 disk drives, documentation, software. Datassete in tattered box. trs 80 coco - bent corner, works Vic20 1525 graphics plotter / printer. apple IIc - works - keyboard sticks sometimes commodore 64 1702 monitor zenith portable / luggable, complete, second drive sticks/ jams. Boots to dos. Boxed copy of ms dos 6.22 upgrade boxed borland C++ boxed masm like new in box tandy 1400 FD computer. excellent shape. Will not power on >from wall jack, tapped into the 6v battery lead and it works fine, some kind of power jack issue. charging jack works intermittantly. Atari portfolio commmodore amiga 500 with keyboard. Never bothered with it. Has scsi controller, no hard drive. Ordered a floppy to boot it to workbench, it did so. God knows where that floppy is now though... Hp 9000 desktop with related peripherals. boots to hp basic. External enclosure, hard drive and floppy drive External enclosure, dual floppy drive. keyboard Tiny inkjet printer (all the above gear is uses HPIB connection. Plan was to get this all wired into my logic analyzer and other bench instruments, never bothered) This list may be updated in the next week or so as i find more, feel free to ask questions or inquire on pricing. Not looking to strike it rich, but not just giving it away either. Im shifting my focus to mainly DEC and SGI gear. I love picking up the microcomputer stuff, but i just do not need that many machines. I have a nice commodore 64, that should be enough for now. That all being said, if anyone has a vax 780 for sale in florida..... --Devin

9 years, 2 months

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KDJ11-B PDP 11/73 getting stuck in Exit standalone mode diag #56

by jnc＠mercury.lcs.mit.edu

> From: Glen Slick > the Q22/Q22 backplane is not good for an 11/83 CPU ... M8190 boards and > both have PMI signals on the CD half of the CPU board. So I seem to recall hearing tales of PMI cards emitting smoke when plugged into a Q/Q/ backplane. That doesn't seem to have happened here: >> I confirmed the KDJ11-B works fine in a BA23, getting past test 56. So I wondered if his off-brand backplane didn't have +12V or -12V wired up - whatever it is that causes the damage. So I compared a list of PMI pins with a QBUS pinout, trying to see if it was the +12V or 12V that would be the problem. However, I don't see any PMI pins that conflict? (Well, some of them are ground, or +5V, but will that harm bus driver TTL?) Here's my list of PMI pins: CB1 PSSEL CD1 PUBMEM CE1 PBCYC CF1 PUBSYS CH1 PHBPAR CJ1 PSBFUL CK1 PLBPAR CM1 PRDSTB CP1 PBLKM CR1 PBSY CV1 PUBTMO DB1 PWTSTB DC1 PBYT DD1 PMAPE Anyone have any idea which pin(s) is the issue, when plugging a PMI card into a Q/Q slot? Noel

9 years, 2 months

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Bernie Appel, ‘Mr. RadioShack, ’ Dies ushered in TRS 80

by COURYHOUSE＠aol.com

Bernie Appel, ?Mr. RadioShack,? Dies http://www.twice.com/news/people/bernie-appel-mr-radioshack-dies-85/64710 Ed# _www.smecc.org_ (http://www.smecc.org)

9 years, 2 months

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Need help with a rescue need Chico / Paradise, California (can someone pick-up and hold?)

by ian.finder＠gmail.com

If anyone would be willing to rescue and hold a small-ish (large desktop) machine near there for later pickup by me this summer, it would be much appreciated. I can pay you a small fee either in beer or American currency. Please let me know if you're willing to help coordinate a rescue. -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

9 years, 2 months

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Fwd: from reddit

by pete＠petelancashire.com

https://www.reddit.com/r/retrobattlestations/comments/63b8bm/so_i_bought_an… No association etc with the person -pete

9 years, 2 months

2
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Old manuals (Univac, IBM, Burroughs, Teletype)

by tpisek＠pobox.com

Spring cleaning has unearthed manuals I no longer need (not clear if I ever needed them ... ). Here's the list: Univac an/uyk-7 theory & diagrams Univac federal systems Technical Bulletins (1973) IBM 1620&1622 CE manuals & complete system diagrams (vol 1,2, & 3) IBM 3031 theory of ops diagrams (vol 1-5) IBM 129 card punch CE & ald diagrams IBM 3275 ald diagrams (2 vols) Burroughs Global Memory schematics & flow diagrams Teletype 33 teletypewriter (ksr & asr) technical manuals and parts list --- Todd

9 years, 2 months

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interesting... hp-9000 in the news! - russian-hackers-used-backdoor-two-decades

by COURYHOUSE＠aol.com

interesting... hp-9000 in the news! - russian-hackers-used-backdoor-two-decades https://www.wired.com/2017/04/russian-hackers-used-backdoor-two-decades/?mbi d=nl_4317_p3&CNDID=42833909 enjoy! Ed#

9 years, 2 months

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More tapes - This time all Tektronix 405x series

by pete＠petelancashire.com

https://goo.gl/photos/m91e3UPSvN6tHUaS7

9 years, 2 months

2
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Supercomputers, fishing for information

by iamcamiel＠gmail.com

I'm making arrangements to have four (mini-)supercomputers from the 1980's shipped to me. In the mean time, I'm trying to find out what I can about these systems, so this is a fishing expedition. The systems are: * Convex C1-XP * Convex C1-XL * Intel iPSC/860 * Ardent Titan Pictures of these can be found on my website, at http://www.vaxbarn.com/index.php/collection/27-odd/76-four-supercomputers (click on the thumbnails to see a larger version) I'd like to get in touch with anyone who knows anything about these machines, as well as anyone who may have documentation, but I also have two specific questions: - Can anyone identify the tape drives shown in the pictures? I believe the one in the Intel iPSC/860 is an Exabyte 8mm one, but the ones used on the Convex and the Ardent are a mystery to me. - Does anyone know what the SRM (System Resource Manager) for the iPSC/860 physically looks like? Does it look like a PC, and does it say Intel on the front? Reason I'm asking is that I'm getting these out of an estate, and I need to tell them what to look for. Thanks, Camiel.

9 years, 2 months

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interesting... hp-9000 in the news! - russian-hackers-used-backdoor-two-d...

by COURYHOUSE＠aol.com

Awesome David! now I know what to look for! I like things with a story for our museum displays... the original one always best but next to it is 'one like it' example We do not have Tim Berners-Lee's NeXT cube... but we have one like it! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 4/3/2017 8:20:04 P.M. US Mountain Standard Time, davidkcollins2 at gmail.com writes: It's an HP9000 E55. The HP Computer Museum even has one in our collection! David Collins Curator www.hpmusuem.net David Collins Client Engagement Manager Dimension Data Tel: +61 3 9626 0593 Mob: +61 424 785 131 e-mail: david.collins at dimensiondata.com (Sent from out of office) On 4 Apr 2017, at 9:23 am, Cameron Kaiser via cctalk <cctalk at classiccmp.org> wrote: >> interesting... hp-9000 in the news! - >> russian-hackers-used-backdoor-two-decades > > I'm trying to identify the specific unit. It looks like an early PA-RISC, > but even the enlargement doesn't show the model number clearly. > >> https://www.wired.com/2017/04/russian-hackers-used-backdoor-two-decades/ > > -- > ------------------------------------ personal: http://www.cameronkaiser.com/ -- > Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com > -- Please dispose of this message in the usual manner. -- Mission: Impossible -

9 years, 2 months

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RIP Dr. Kan Yabumoto

by cctalk＠ibm51xx.net

Hello All: I am not sure if this is "vintage" enough. However, Dr Kan Yabumoto (1948-2017) passed away after a long illness on 03-31-17. He was involved in the computer industry for many years after being a chemical engineer. He designed and programmed "Mad Planets", one of the "1001 Video Games You Must Play Before You Die". However, in this group though he may be better known for his work at his company Pixelab. Pixelab produced DatMan, XXCopy, and XXClone. I had the good fortune to become friends with Kan while seeking support for XXCopy. He was an intelligent and caring man and he will be missed. -Ali

9 years, 2 months

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interesting... hp-9000 in the news! - russian-hackers-used-backdoor-two-decades

by jfehlinger＠comcast.net

Ed Sharpe wrote: > I'm trying to identify the specific unit. It looks like an early PA-RISC, > but even the enlargement doesn't show the model number clearly. The case matches HP-9000 Series 800 (F-class server) -- one of the lower-end models (807, F10; 817, F20; 837, F30). All based on PA-7000 32-bit CPU (PA-RISC version 1.1a, introduced 1991). http://muuseum.at.mt.ut.ee/kogu/077.html http://www.openpa.net/systems/hp-9000_series-800_nova.html http://www.openpa.net/pa-risc_processor_pa-7000.html PDFs of "Owner?s Guide to the HP 9000 8x7S Family" (1991) and "CE Handbook Series 9x7 and Model 8x7S Family" (1992) are downloadable via links at http://www.openpa.net/systems/hp-9000_series-800_nova.html .

9 years, 2 months

1
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Stuffing boards with pulled QFP chips

by dave＠661.org

I'm down to the last few P112 boards for sale and am pondering another run of them because demand is steady. One of the biggest challenges for the last run was getting the QFP-packaged 100-pin chips[1] in a state such that the pick-and-place robot wouldn't throw a fit about slight differences in lead position. The stuffing house insisted that I send them new chips. Pulls, though they looked perfectly okay to me, were not acceptable. Does anyone here know anything about pick-and-place robots using pulled 100-pin QFPs, particularly a stuffing house that can work with such chips and not screw up? [1] The now-obsolete super-io chips -- 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, 2 months

9
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interesting... hp-9000 in the news! - russian-hackers-used-backdoor-two-d...

by COURYHOUSE＠aol.com

due to it's infamy....I think we need one like it for the museums's collection! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 4/3/2017 4:23:47 P.M. US Mountain Standard Time, spectre at floodgap.com writes: > interesting... hp-9000 in the news! - > russian-hackers-used-backdoor-two-decades I'm trying to identify the specific unit. It looks like an early PA-RISC, but even the enlargement doesn't show the model number clearly. > https://www.wired.com/2017/04/russian-hackers-used-backdoor-two-decades/ -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Please dispose of this message in the usual manner. -- Mission: Impossible -

9 years, 2 months

1
0
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Intellivision reset switch

by Richard.Sheppard＠telus.com

> I'm guessing it was a blob of foam, which has deteriorated, but maybe it > was a metal spring, or a piece of u-shaped plastic etc. May depend on the model, but mine has a spring under the plastic reset button in the top of the case and one of those metal domed tactile switches on the PCB. Richard Sheppard

9 years, 2 months

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HISTORY OF COMPUTER DESIGN: THE MOST INNOVATIVE AND UNCONVENTIONAL PCS EVER MADE

by lproven＠gmail.com

This series of articles focuses mainly on physical design, of cases and so on, but there are some technical details in the articles too. Note that this is the landing page -- at the bottom of the page are links to other articles in the Inexhibit series, such as the Holborn 9100 and Olivetti Programma 101. https://www.inexhibit.com/specials/history-of-computer-design-the-most-inno… -- Liam Proven ? Profile: https://about.me/liamproven Email: lproven at cix.co.uk ? Google Mail/Talk/Plus: lproven at gmail.com Twitter/Facebook/Flickr: lproven ? Skype/LinkedIn/AIM/Yahoo: liamproven UK: +44 7939-087884 ? ?R/WhatsApp/Telegram/Signal: +420 702 829 053

9 years, 2 months

4
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Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)

by jnc＠mercury.lcs.mit.edu

> From: Klemens Krause > We clean our RK05 disks in a very robust way: with cheap burning spirit > and paper towels. ... We rubbed away thick black traces from occasional > head crashes and we never removed the oxide coating with this torture. I am about to get a large batch of RK05 packs, so I am interested in the details of this. First, what is 'burning spirit'? (I assume this is a straight translation into English of some German term, but not knowing German... :-) After poking around with Google for a while (hampered no little by the fact that it's the name of a band, and also a term in World of Warcraft :-), it seems like it might be acetone? Noel

9 years, 2 months

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Got a Sun 2/120, ISO Sun 2/3 monitor, Sun 2 keyboard, Sun 2 mouse

by ian.finder＠gmail.com

Hi folks! I recently acquired a functional Sun 2/120. The framebuffer I have is switchable between TTL and ECL, so I can use either an Sun 2 or Sun 3 monitor, which I am looking for. I am also looking for a keyboard and mouse. If anyone on list has any of these items and would be willing to sell them to me, please contact me. I plan to completely restore the system. Thanks, - Ian -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

9 years, 2 months

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Reparando um Vectrex

by alexandre.tabajara＠gmail.com

Oba, post novo no blog! / New post on blog http://tabajara-labs.blogspot.com.br/2017/03/consertando-um-vectrex-com-um-… ---

9 years, 2 months

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Test message - what happened NOW to the mail system?

by hachti＠hachti.de

Hi, I just saw that mails from some people now arrive as desired (real sender, reply-to list), but some (e.g. myself) are still mangled with "xxx via cctalk" - did I miss a setting? Confused... Philipp

9 years, 2 months

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Intellivision reset switch

by jules.richardson99＠gmail.com

Can anyone who's been inside an Intellivision confirm that there's supposed to be a little foam disc beneath the reset switch plate? I picked a system with a box of cartridges up earlier, half expecting the machine to be dead (I was figuring it was going to be a blob of easily-dead-after-so-many-years custom logic inside, but it's more like a "real computer" in nature). It *was* dead, but the [initial, at least] issue seems to be that the reset switch consists of a metal plate which is supposed to make contact with the PCB when pressed - and presumably is held away from the PCB by something when at rest. Except that there's no "something" in this machine - with the machine the right way up, the plate is free to contact the PCB, holding it in permanent reset. I'm guessing it was a blob of foam, which has deteriorated, but maybe it was a metal spring, or a piece of u-shaped plastic etc. cheers Jules

9 years, 2 months

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IBM RT PC card.

by mattislind＠gmail.com

This card is sitting in a IBM RT PC. http://i.imgur.com/Adqnxr3.jpg?1 What kind of card is it? The WD1935 seems to be a SDLC chip. I cannot find any reference to the numbers P/N 6247874 (bottom layer etch) or the number on the sticker on the backside: 6247871G001 It is connected to an IBM marked dongle which has 4 BNC connectors. Is it a 3278-3279 emulation board? /Mattis

9 years, 2 months

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New HP42s clone almost available

by COURYHOUSE＠aol.com

Good hear it stood the test of time! As an HP PC dealer in the 80s into early 90s we ha a calculator contract with HP also and... we sold the heck out of them! Is it the only one of the 10 series calcs that stayed in production? I have a set of the special demo versions that were mounted on a descriptive plaque that had been in the PHX HP Corp demo center... when they redid that they knew I Hoarded stuff and sent them over. For some of the 10 series that were still being used we had them on the display floor the others went into the the suites next to the business in the historical display. Ed# In a message dated 4/2/2017 8:50:16 P.M. US Mountain Standard Time, cctalk at classiccmp.org writes: On Sun, 2 Apr 2017, Ed via cctalk wrote: > That is an undertaking indeed! I had not seen this.... Ed# > Someone said the 12c was still being made? The 12c never went out of production. It has been continuously updated. A lot of bankers, insurance people, etc still rely on them. -- 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, 2 months

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New HP42s clone almost available

by COURYHOUSE＠aol.com

That is an undertaking indeed! I had not seen this.... Ed# Someone said the 12c was still being made? In a message dated 4/2/2017 9:00:53 A.M. US Mountain Standard Time, cctalk at classiccmp.org writes: A few months ago I had a prototype of this 42S clone in my hands. It looked and felt very promising! I?ll will buy one when it will be available. For those of you who are interested, please follow the discussions on hpmuseum.org <http://hpmuseum.org/> forum. Jurgen > Am 10.03.2017 um 16:34 schrieb David Griffith via cctalk <cctalk at classiccmp.org>: > > > There's a Swiss guy who's made a name for himself by producing working replicas of classic HP calculators. See https://www.swissmicros.com/. I recently discovered his post on Youtube a video showing off an enhanced replica of my favorite HP calculator, the HP42s. This one is called the DM42. Here's the video: https://www.youtube.com/watch?v=0LK7JotR728 > > -- > 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, 2 months

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RIP: Daniel Bobrow

by tony.aiuto＠gmail.com

http://www.legacy.com/obituaries/nytimes/obituary.aspx?n=daniel-bobrow&pid=… I think Ken Thompson paid him the greatest tribute in his Turing Award paper. *"I suspect that Daniel Bobrow would be here instead of me if he could not afford a PDP-10 and had had to "settle" for a PDP-11. * https://www.ece.cmu.edu/~ganger/712.fall02/papers/p761-thompson.pdf

9 years, 2 months

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New HP42s clone almost available

by dave＠661.org

There's a Swiss guy who's made a name for himself by producing working replicas of classic HP calculators. See https://www.swissmicros.com/. I recently discovered his post on Youtube a video showing off an enhanced replica of my favorite HP calculator, the HP42s. This one is called the DM42. Here's the video: https://www.youtube.com/watch?v=0LK7JotR728 -- 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, 2 months

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OT: PCI Ethernet or USB 2.0 ethernet?

by w2hx＠w2hx.com

Friends, I have an instrument that has an intel motherboard with 400 MHz FSB PCI (not PCI-e). It has a 100 mbps Ethernet card and it would be very useful to get faster networking. The chassis of this instrument is such that I cannot fit a traditional PCI 1GB Ethernet card (I've tried). So I will have to go wifi (which I can make fit because I can remotely locate the wifi antenna). I have 802.11ac both 2.4 and 5 GHz available. While it certainly won't get as good a throughput as a dedicate GB Ethernet card, this is my only option. The question is, whether you think I would be better off using PCI wifi card or a USB-wifi adapter. I should mention the USB on this instrument is USB 2.0, the spec for which claims up to 480 Mbps. Anyone have an opinion which might get me better results? The wifi infrastructure is one constant in this scenario, just looking to see pci- or usb-based wifi card. Since this is wildly off topic, please respond to me directly so as not to bother everyone else :) W2hx at w2hx.com<mailto:W2hx at w2hx.com> Thanks Eugene

9 years, 2 months

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Trip to CHM - Hotel/Restaurant Advice

by barythrin＠gmail.com

I thought the Vintage Computer festival west link might have recommended hotels but I couldn't find anything for you. I did a similar trip but needed to be quite a few hours south for my actual destination. I didn't find a very cheap hotel either, and the under $100 one I did find near long Beach was quite underwhelming. The type my wife wouldn't have let us stay at. What I did find more useful was a super small rental car for $98 that did give me much more freedom to get around a few sites (and Weird Stuff). ?It was highly recommended not to sleep in the car though so best luck. I explored airbnb but it seems to mirror closely to hotel prices and a surprisingly large amount want a 2 day stay. But CHM is definitely a fun trip. I have a quite large collection for home computing so I wasn't sure how long I'd stay occupied but between the demos and tours and just perusing I definitely could have enjoyed more than the afternoon I spent. Best recommendations were ubering or rental car then get a hotel in your price range but don't worry as much about location. Or get one near the train.

9 years, 2 months

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Apple 1, Commodore 65, Enigma Machine, Inventor of C++

by barythrin＠gmail.com

-------- Original message --------From: Christian Corti via cctalk <cctalk at classiccmp.org> Date: 3/29/17 3:29 AM (GMT-06:00) To: Evan Koblentz <cctalk at snarc.net> >On Tue, 28 Mar 2017, Evan Koblentz wrote: >> "What do an Apple 1, Commodore 65, >>Enigma Machine, and the inventor of C++ >> all have in common?" >They're just overestimated pieces of junk ;-)?>(and C++, not its inventor) >[duck...] Said to most of us about our hobby and collections? We're supposed to be challenging that battle, mate. Not feeding it ;-)

9 years, 2 months

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Trip to CHM - Hotel/Restaurant Advice

by rickb＠bensene.com

Hello, all, In mid-June, I am planning a trip to Mountain View for two days to visit the Computer History Museum. I plan on flying out of Portland early AM on June 14, checking into hotel, then heading straight to the museum for the day. I will go back to the hotel for the evening, and return to the museum on the 15th, and stay into early afternoon, and then check out of the hotel and head to the airport to return home. I haven't been to CHM before, and am looking forward to spending an extended period of time there. What I'm asking for is help/recommendations in terms of a good hotel to stay at that is relatively close to the museum. I don't want to be in a luxury hotel, nor do I want to be in a dive. I'd also like to be in a place that has a restaurant relatively close by (preferably within walking distance) that I could get some decent meals (breakfast/dinner) while I'm there. Unless this is a topic of general interest to the group, it'd probably be best to reply to me directly rather than post responses to the list. Many thanks, -Rick -- Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com

9 years, 2 months

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WTB: DEC VR241 or HP 6000 670H (or 670XP)

by spectre＠floodgap.com

I'm looking for two items: A VR241 to use with my DEC 380 as a colour head (even better if you have the cable and a spare LK201, since I'm down to my last working keyboard). The VR201 isn't cutting it anymore and I don't think I can use my VR260 with this. An HP 6000 670H hard disk (the big one for the 300 series). XP even better, but I've done just fine with an H. Please include what price you're asking. Thanks! -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Communism doesn't work because people like to own stuff. -- Frank Zappa ----

9 years, 2 months

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Cross-talk square-wave?

by jnc＠mercury.lcs.mit.edu

> From: Brent Hilpert > I don't have a full enough picture of the circuit and circumstances to > provide a definitive suggestion but, some principles: > ... > It's not clear C-coupling is what's going on here (the wave shape looks > pretty sharp for what I understand of the circuit/layout). Thanks for taking the time for that detailed message. I suspect, however, that Jon Elson has nailed it (thanks Jon :-); if that's what's happening, it explains why we couldn't understand what the devil was going on! > (You've mentioned both 470K and 270K for the R, could make a difference > to the analysis). Yeah, that was just a typo; going from memory. Noel

9 years, 2 months

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