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101090 discussions

Giant LED Displays - Re: Motion video on an IBM PC/XT - Methodology

by ajp166＠bellatlantic.net

> >Subject: Giant LED Displays - Re: Motion video on an IBM PC/XT - Methodology > From: Grant Stockly <grant at stockly.com> > Date: Mon, 14 May 2007 21:53:37 -0800 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >At 07:40 PM 5/13/2007, you wrote: >>About 3 years ago I announced to the list a little something I'd done with >>an IBM PC/XT with CGA that was unconventional for the platform >>(full-motion video using stock hardware). I recently gave a talk at a >>hacker convention on the complete methodology of how I did it, and the >>video of that talk is now available here: >> >>http://www.archive.org/details/8088CorruptionExplained > >This whole discussion has reminded me of an unfinished project of mine, a >192x99, 19,008 pixel LED display. I have not manufactured the driver >circuits, but they have been designed. > >The display is organized/refreshed as 11x1728. 8x11 characters look very >good to me, so I designed it to handle 24 wide by 9 high characters. > >Here are pictures of it: >Front: http://www.stockly.com/images2/060129-LED_Display_Front_2718.jpg >Back: http://www.stockly.com/images2/060129-LED_Display_Back_2716.jpg >Weight of all the >legs: http://www.stockly.com/images2/060129-Weight_of_39584_Legs_2696.jpg > >As you can see from the pictures it is as big as a couch. : ) > >I built it in the spirit of blinkin lights for my Altair. 19008 LEDs is >2376 bytes, 71280 bytes a second at 30 frames. The altair should be able >to handle this...??? Any ideas? Thats faster than SD 8" FDC data rate! Thats pushing an 8080 hard. >I would really love if it could handle a shade or two of grey. : ) I'm >considering now building a driver out of an FPGA. It would be able to >handle a fast refresh rate and frame rate in order to get grey scales. I >was thinking 4 shades would be enough. The FPGA might even be able to act >as the dual port SRAM for the bitmap display? Any ideas how I should >proceed? : ) You want the CPU doing as little as possible. If at all possible the display is refreshed by DMA from local or other memory and the CPU is there to update/alter the display. >You can find my thread on this on USENET called "Wall of RAM". I have >copied it here: >http://www.stockly.com/forums/showthread.php?t=21 > >Grant ;) if I were to do something on that grand a scale I'd consider a LED billboard of VDM-1 (160x512) (roughly 30"x100"). Of course it would have to use green leds. Allison

19 years, 1 month

Fairchild MB8116E == 4116 ?

by adamg＠pobox.com

MB8116 is a Fujitsu part, not Fairchild. Per the 1982 databook it crosses to AM9016, F4116, HM4716A, 2117, M5K4116, MK4116, MCM4116, MM5290, TMS4116, TMM416. -- Adam

19 years, 1 month

A twist on emulation...

by gtoal＠gtoal.com

> From: Allison <ajp166 at bellatlantic.net> > The links do not works from here. I get an operation timed out > error. > Allison It's my home site on a RoadRunner cable connection, and the cable modem locks up if there is excess traffic. Doesn't happen often, but judging by my web logs I was being overloaded by coincidental spidering from 4 different search engines at once. It's back online now. Had to wait until I got home to reset the cable device. Some time this summer, history.dcs.ed.ac.uk should be relocated to a properly hosted machine in Edinburgh. Oh yes - that reminds me - if there are any Edinburgh people here, we're organising a reunion in late June. Mail me for info. Graham

19 years, 1 month

Color Macintosh boot floppy?

by roger.holmes＠microspot.co.uk

> > Can anyone help me with creating a boot floppy for a Color Macintosh? > I have a machine whose hard disk died and I'm trying to replace it > but I don't have a boot floppy containing DiskTools to format the new > (Apple) hard drive. I *do* have an install CD for System 7.5 but it > doesn't seem to want to boot on the Color Classic even if I hold "C" > down when I start up the Mac. I'd be happy to pay for shipping and > something extra for the effort involved in making the DiskTools boot > disk. I think at one time you had to hold down both the C and D keys to boot from CD on the old Macs. I don't have a floppy drive any more so cannot help there, even though I have just about all the Apple developer CDs ever issued, including floppy images of the various systems.

19 years, 1 month

Motion video on an IBM PC/XT - Methodology

by trixter＠oldskool.org

About 3 years ago I announced to the list a little something I'd done with an IBM PC/XT with CGA that was unconventional for the platform (full-motion video using stock hardware). I recently gave a talk at a hacker convention on the complete methodology of how I did it, and the video of that talk is now available here: http://www.archive.org/details/8088CorruptionExplained Just thought some people here would be curious to see how it was accomplished. While there are several versions of the video to choose from, if you have the bandwidth you should grab the MPEG-2 version (big) because it's DVD quality and best preserves some of the detail necessary to properly appreciate the piece. (In fact, it looks best burnt to a DVD and watched on a television proper.) -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Help our electronic games project: http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/ A child borne of the home computer wars: http://trixter.wordpress.com/

19 years, 1 month

The Last of The Line

by RodSmallwood＠mail.ediconsulting.co.uk

Hi When preserving something you go for the best example you can find. Even so in this case there was no choice involved. I want to keep as original as I can a a PDP-11 from the era when I was working with them. Speed is not an issue and a slower (but working)DEC KDJ11 board would satisfy my criteria for originality. All of your points are well made. One is very important the KDJ11-EB has its memory on the CPU board. Are you saying some models of the KDJ11 do not have their memory on the CPU board? Is it a case of unpopulated sockets and add memory or is it no sockets and no memory? Reading from the factory label the 11/94 was confgured thus Slot 1 M8981 (Now sadly empty) Slot 2 M7914 Slot 3 Empty Slot 4 M8191 KTJ11-B Slot 5 M7547 TUK50-BB Slot 6 Empty Slot 7 Empty Slot 8 Empty Slot 9 M9302 & M9713 So excluding the expensive options can anybody say exactly which board I need. Full module and DEC code to me please. For example only say M8980-AA KDJ11-BB I must get a list of the KDJ11 boards. Iv'e seen one somewhere. Rod -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Jerome H. Fine Sent: 14 May 2007 03:16 To: On-Topic and Off-Topic Posts Subject: Re: The Last of The Line >Patrick Finnegan wrote: >>On Sunday 13 May 2007 06:28, Rod Smallwood wrote: > > >>Hi All >>Now for my dilemma. Before checking the cost of a KDJ11-EB you are >>advised to make sure pacemaker batteries are fully charged and any >>blood pressue medication has been taken. Take it from me the prices >>are so high they need to join the astronaut corps! >> >..which is probably why your systems were missing the CPU boards when >yo got them... > >>I would like to get at least one of these historic systems running >>again. Suggestions please!! >> >It'd be a lot less expensive to turn it into an 11/84, the CPU for that >(some models of KDJ11-B) should be much less expensive, then just add >memory. :) > Jerome Fine replies: Your suggestion might not be possible. I once had the box and boards for an 11/94. I really can't remember, but there might not have been any slots for the memory. In any case, I am extremely curious. What goal(s) will you achieve? Do you want to run software faster? Is your only goal to have the fastest PDP-11 that DEC ever produced? Note that a number of other companies produced much faster PDP-11 CPU boards. Note that I very much appreciate that from a hardware point of view your goal is extremely gratifying - probably even more than my software goals. I am just curious what your goals are. One of my goals when I run using PDP-11 software is to run as fast as possible. At present I run at about 15 times a PDP-11/93. Very shortly, I hope to be upgrading my hardware and be able to run at 100 times a PDP-11/93 along with the availability of having an extra GigaByte of spare memory for data that may also allow a co-processor to perform CPU intensive calculations. About 20 years ago, I was using a PDP-11/23+ on a system with 4 MB of memory which included a co-processor that used the same memory as the PDP-11/23+. Any finally, although my experience is with an 11/93 on the Qbus, I found that there is very little difference between an 11/93 and an 11/83 as far as CPU speed is concerned. That would also be likely to apply to the difference between an 11/94 and an 11/84. Basically, I suggest that the only difference in speed is due to the clock rate of 20 MHz on the 11/93 board and the 18 MHz clock rate (or crystal if you prefer) on the 11/83 board. Otherwise, the PMI memory on the 11/83 is probably about as fast as the on board memory on the 11/93. As for the actual CPU, almost all M8190 quad CPU boards or KDJ11-Bx (maybe all) allow the use of PMI memory which is the primary reason the 11/83 is faster than the 11/73. The other reason is the 18 MHz clock rate on the 11/83 as opposed to the 15 MHz clock rate on the 11/73. So if anyone has a M8190 CPU with non-PMI memory and can find some PMI memory, then as long as there are ABCD slots available for all of the memory and CPU boards, the system will run much faster with PMI memory. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

19 years, 1 month

Manuals being scanned

by adamg＠pobox.com

Since no one seems to have said this yet: Thanks for making an effort to preserve these documents. -- Adam

19 years, 1 month

looking for System III/PC-UX for NEC APC III

by chrism3667＠yahoo.com

If you don't have a clue what I'm talking about, I guess you wouldn't have it then, huh? ____________________________________________________________________________________Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. http://mobile.yahoo.com/go?refer=1GNXIC

19 years, 1 month

Subject: Old electrolytic capacitors (IME-86s calculator)

by ed＠ed-thelen.org

Message: 12 Date: Mon, 14 May 2007 09:32:35 -0500 From: Jules Richardson <julesrichardsonuk at yahoo.co.uk> Subject: Old electrolytic capacitors (IME-86s calculator) To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Message-ID: <46487303.8040805 at yahoo.co.uk> Content-Type: text/plain; charset=ISO-8859-15; format=flowed ... > They're in the power supply of an IME-86s calculator and > are decidedly past their best :-) (At least four of the ten > in the PSU are showing signs of major leakage) I'm the power supply guy in a large restoration effort. http://www.ed-thelen.org/1401Project/1401RestorationPage.html http://www.ed-thelen.org/1401Project/TricksForCapacitors.html Fortunately, there were only linear supplies, (suitable switching devices not yet available for switching power supplies - another interesting game :-)) The machines (and currents) were large and most electrolytics were the screw connector types. After considerable experience, and using an ESR (Effective Series Resistance) unit to verify performance of the re-formed electrolytics, I went to replacing only those capacitors with "major" leakage, and testing ripple for "excessive" and that everything was "cool enough" when power supply running rated voltage and current. > The rest of the machine *looks* healthy enough; once > I've replaced the electrolytics is there any good reason > not to slowly run the system up on a variac > (rather than giving it full AC from the start)? A vital thing to watch out for in this business is motors. Most types of motors depend on sufficient source voltage to get started and generating "back EMF (voltage)" to limit current. I was using the variac technique on an old key punch when we began to hear a loud hummmm - the capacitor start motor was not moving and getting warm :-((( Interestingly, we have not had to "re-form" any capacitors on capacitor start motors!! ?? I have no clue why. One would reasonably expect some effort there. Enjoy :-))

19 years, 1 month

RM Nimbs

by chrism3667＠yahoo.com

I didn't know the 'bus took cartridges. How many different kinds were there? Besides the Peanut, the only other PC I'm aware of that used them was the Mindset. Currently I'm missing a huge mega box of docs and stuph for the 'set, and I'm about ready to burst out in tears. ____________________________________________________________________________________ We won't tell. Get more on shows you hate to love (and love to hate): Yahoo! TV's Guilty Pleasures list. http://tv.yahoo.com/collections/265

19 years, 1 month

A twist on emulation...

by ajp166＠bellatlantic.net

The links do not works from here. I get an operation timed out error. Allison > >Subject: A twist on emulation... > From: "Graham Toal" <gtoal at gtoal.com> > Date: Mon, 14 May 2007 14:18:26 -0500 > To: cctech at classiccmp.org > >I took a pdp15 compiler and a pdp15 emulator this weekend and >hacked them together in a way such that the compiler outputs >what looks like a windows executable that you can simply run >like a normal DOS (x86 DOS, not the other one) command-line >program. The emulator is embedded in the .EXE along with the >pdp15 code. > >It lets you have the experience of writing in an early 1970's >language for the PDP15 much as if you'd been on the machine >itself, but without the hassle of managing an emulator. > >The language is an early version of Imp, which predates the >more common Imp77 or Imp80 versions; in fact it is actually >much closer to the original Atlas Autocode than it is to the >final versions of Imp. A significant feature of the language is >that it allows embedded PDP15 assembly language. > >Unfortunately I don't have a document describing the early language, >though I do have a few example programs you could look at to >pick it up from. > >The windows-ported binary of the compiler is here: > > http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/windows_port/ > >see the readme.txt for manual installation instructions. > >I'll put up the source of the system and some working example imp15 >source files in a day or two. > >meanwhile related files are: > >http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/EMULATOR.txt >http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/CompilerOutput.htm > >http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/hdcomp-emul.i15.html >http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/takeon.i15.html >http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/gram.txt > >http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/IMP15SYS.TXT > >a trivial hello world program looks like this: > >%begin > %print %text 'Welcome to the 1970''s!' >%end %of %programme > >save it as hello.i15 and then execute these commands: > >imp15 hello >link15 hello >hello > >Here are some more example programs; they're not likely to compile >or run, they're just for looking at to learn the language: > >http://history.dcs.ed.ac.uk/archive/languages/hal/7502/hal7502.i15 >http://history.dcs.ed.ac.uk/archive/languages/hal/interdata/hal70.i15 >http://history.dcs.ed.ac.uk/archive/os/pdp915/edit15.txt >http://history.dcs.ed.ac.uk/archive/os/pdp915/decode.txt > >The original pdp15 operating system (not needed for this compiler) >is here: >http://history.dcs.ed.ac.uk/archive/os/pdp915/ > >The operating system was basically a run-time environment for >the Imp compiler. > >Graham

19 years, 1 month

The Last of The Line

by RodSmallwood＠mail.ediconsulting.co.uk

Ah Ha ... Thanks and the memory card would be a ???? Rod -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Roger Ivie Sent: 14 May 2007 21:02 To: General Discussion: On-Topic Posts Only Subject: RE: The Last of The Line On Mon, 14 May 2007, Rod Smallwood wrote: > When preserving something you go for the best example you can find. > Even so in this case there was no choice involved. I want to keep as > original as I can a a PDP-11 from the era when I was working with them. > Speed is not an issue and a slower (but working)DEC KDJ11 board would > satisfy my criteria for originality. I've never met an 11/94, so I'm no expert. My understanding of the situation was the 11/94 was built when it became possible to put all of the memory on the CPU board. The 11/84 used a CPU board without memory. The memory was in the slots between the CPU board and the UNIBUS adapter, communicating with the CPU board using a private memory interconnect protocol. I don't recall whether there was an additional ribbon cable across the top, like the MicroVAX II. I'm pretty certain (but, have been wrong before) that the KDJ11-BB would be the 11/83 or 11/84 CPU; they used the same CPU board, differing in the backplane and whether the UNIBUS adapter was present. -- roger ivie rivie at ridgenet.net

19 years, 1 month

Lonely Mac..

by robert＠irrelevant.com

I'm mainly a BBC Micro person, but thanks to the local freecycle list, i'm now up to two Apple Macintosh II base units - latest is a IIsi. Unfortunately those are all I've got .. no monitors, no keyboards, no mice. nothing.. These are ADB mouse/kb, so not something I have already.. I've never used a Mac before .. so... has anybody, preferably in the UK, got any spare peripherals going cheep/free so I can at least test them, see what all the fuss was about :-) Cheers, Rob

19 years, 1 month

A local computer history group for my area . . .

by dgreelish＠mac.com

>From: "Ethan Dicks" <ethan.dicks at gmail.com> >Yeah... the definition of "old" tends to be quite subjective, as in >"prior to what was current when _I_ got started with foo." > >I tend to think of "old" as 100% TTL designs, i.e. - >pre-microprocessor, but that's because I got my start with the 6502 >and 1802, then later came upon M-series DEC logic-based machines (like >the PDP-8/L). Well, what I'm trying to do is essentially create a mini VCF that meets each month, so at least for now, the rules are pretty loose. I'll see how many show up this Saturday, then in a month and so on. There is a much smaller potential pool of members on a local level, but I have hopes! Go north-east Florida, we can do it. I'll just mostly stick to the ten year rule for now. I just hope to have a lot of fun and see and "play" with some cool machines I haven't seen that much, or at all. Perhaps a swap meet twice a year would be great too. Best, David David Greelish classiccomputing.com The Classic Computing Podcast Home of Computer History Nostalgia Stan Veit's History of the Personal Computer Audio Book Podcast

19 years, 1 month

A twist on emulation...

by gtoal＠gtoal.com

I took a pdp15 compiler and a pdp15 emulator this weekend and hacked them together in a way such that the compiler outputs what looks like a windows executable that you can simply run like a normal DOS (x86 DOS, not the other one) command-line program. The emulator is embedded in the .EXE along with the pdp15 code. It lets you have the experience of writing in an early 1970's language for the PDP15 much as if you'd been on the machine itself, but without the hassle of managing an emulator. The language is an early version of Imp, which predates the more common Imp77 or Imp80 versions; in fact it is actually much closer to the original Atlas Autocode than it is to the final versions of Imp. A significant feature of the language is that it allows embedded PDP15 assembly language. Unfortunately I don't have a document describing the early language, though I do have a few example programs you could look at to pick it up from. The windows-ported binary of the compiler is here: http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/windows_port/ see the readme.txt for manual installation instructions. I'll put up the source of the system and some working example imp15 source files in a day or two. meanwhile related files are: http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/EMULATOR.txt http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/CompilerOutput.htm http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/hdcomp-emul.i15.html http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/takeon.i15.html http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/gram.txt http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/IMP15SYS.TXT a trivial hello world program looks like this: %begin %print %text 'Welcome to the 1970''s!' %end %of %programme save it as hello.i15 and then execute these commands: imp15 hello link15 hello hello Here are some more example programs; they're not likely to compile or run, they're just for looking at to learn the language: http://history.dcs.ed.ac.uk/archive/languages/hal/7502/hal7502.i15 http://history.dcs.ed.ac.uk/archive/languages/hal/interdata/hal70.i15 http://history.dcs.ed.ac.uk/archive/os/pdp915/edit15.txt http://history.dcs.ed.ac.uk/archive/os/pdp915/decode.txt The original pdp15 operating system (not needed for this compiler) is here: http://history.dcs.ed.ac.uk/archive/os/pdp915/ The operating system was basically a run-time environment for the Imp compiler. Graham

19 years, 1 month

A local computer history group for my area . . .

by RodSmallwood＠mail.ediconsulting.co.uk

Well now let me see now I left School for College in 1964. My major subjects were Industrial Electronics and Computing. We were taken to Harwell Research centre to see 'The' Computer. It was an ICL 1900 series system. It took up three floors of a substantial building. Input on the top floor (80col Cards and papertape). Processing and storage on the middle floor and output on the ground floor. Had to be that way or the vibration from the line printers would have shaken the building to pieces. I remember it was called Atlas and even had an operating system called George III. So that's just over 40 years ago. In computer terms certainly vintage if not veteran. Rod Smallwood -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Ethan Dicks Sent: 14 May 2007 16:39 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: A local computer history group for my area . . . On 5/14/07, Gordon JC Pearce <gordon at gjcp.net> wrote: > Funny, I don't think my PDP-11 is *that* old. It seems to date from > around 1986. I can't call a computer that was built while I was doing > my 'O' grades "old", I just can't... Yeah... the definition of "old" tends to be quite subjective, as in "prior to what was current when _I_ got started with foo." I tend to think of "old" as 100% TTL designs, i.e. - pre-microprocessor, but that's because I got my start with the 6502 and 1802, then later came upon M-series DEC logic-based machines (like the PDP-8/L). -ethan

19 years, 1 month

Subject: Re: Manuals being scanned

by gtoal＠gtoal.com

>> >Google is particularly bad about fetching documents over and over >> >again. >> >> mmm... any evidence they are using OCR to index pdf's? >> >> of all the places I'd *like* them to OCR, it's bitsavers. >> >> in fact, mmmmm, I'd like to connect the two dots. bitsavers >> + google (and, and/all mit, standford, cmu, ... software archives) >> >> something to start mentioning at various fund raising >> cocktail parties :-) > > To be clear - the problem is that Google consumes bandwidth by > repeatedly downloading static documents, verses downloading dynamic > content whose index status might be new or dirty? Guys, if you want bitkeeper OCR'd, have you tried just *asking* Google if they'd do it? They are scanning and OCR'ing huge amounts of paper all the time, working with various libraries. As far as I know, they're doing this for free, because they want all the world's data... It wouldn't hurt to ask... anyone have any contacts at Google? Also, the Internet Archive will accept a DVD by mail of your archives if spidering is too expensive. I gave them a DVD of the Edinburgh Computer History Project last year. (Not sure if the contents are visible online anywhere, but at least they're in the archives and reasonably safe against me trashing my hard drive again...) G

19 years, 1 month

hp 9153c

by mikep＠triadcomputer.com

Hi Phillip, My company TRIAD sells HP legacy and other IT hardware. I came across your name going through some old User Group threads. Do you still require legacy HP or other IT hardware quotes? TRIAD offers expert techs in HP, Cisco, IBM and Liebert and we'd like to be a vendor for you if appropriate. Cheers, Mike Mike Pisciotta Hardware Sales TRIAD Computer Connection Office: 425-402-1700 Cell: 831-566-9270 Fax: 425-402-1777 mikep at triadcomputer.com

19 years, 1 month

Wanted: National Semi VS100 (phoneme generator?) info

by wh.sudbrink＠verizon.net

I went ahead and reverse engineered the TTL on the NETRONICS ELECTRIC MOUTH, so I have a good idea of the addresses, etc. that it uses. The main component on the board is the above mentioned VS100, a 40-pin chip that seems to be (along with 4 ROMs) the heart of the board. Anybody have any info on this guy? Thanks, Bill No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/803 - Release Date: 5/13/2007 12:17 PM

19 years, 1 month

The Plato system

by silent700＠gmail.com

When contemplating spending some fairly serious coin on that IBM system earlier this week, a friend asked "which systems/machines out there would you pay 'real' money for?" Since I'm not a Big Iron collector, and I'm used to spending no more than $10-20 on any given piece, that's a fair question for me. Maybe a Symbolics Lisp machine. Maybe an original Sun machine, or even a 2-series. A Xerox Alto. Historical stuff like that. Then I remembered when my high school class took a trip down to the U of I at Champaign-Urbana for "Engineering Open House" and I was sat in front of this monstrous wooden terminal with beguiling orange vector graphics. Only many years later did I learn what it was, and where it fit in the timeline of computing (thanks in part to Ted Nelson's "Computer Lib/Dream Machines" books.) So...who has one? What's become of the remaining infrastructure? I recently used a Windows Plato client to connect to some descendant of the system, but I asssume even the back end was running on modern hardware then, and not old Data General equipment. -j -- Retrocomputing and collecting in the Chicago area: http://chiclassiccomp.org

19 years, 1 month

looking for TU56

by jack.rubin＠ameritech.net

I'll never know unless I ask - does anyone have a TU56 for sale or trade? Ideally in the $10/lb range, or trade for an Altair 8800. I'm in the Chicago area, will be driving to VCF East and Midwest in the next few months, happy to drive a couple hundred extra miles to retrieve said tape drive. Shipping is a bit frightening, but will certainly be considered. The drive will be interfaced to my 8/E, most likely with a TD8E interface, but a good or restorable unit in any configuration will do! TIA, Jack No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/801 - Release Date: 5/12/2007 6:40 PM

19 years, 1 month

The Last of The Line

by RodSmallwood＠mail.ediconsulting.co.uk

Hi All For reasons that I will not go into here I have most of four PDP-11/94's. The 94 was the last of the PDP11 line. Thats about as classic as it gets. Notice I said 'most'. What's missing is the cpu cards in this case a KDJ11-EB. The DEC orientated amongst us will know that the CPU is a QBus J11 chip based board on quad module (M8981). Ah but the 11/94 is a unibus system you say. Thats right. The board talks to the unibus through a KT11-B that does the conversion. Now for my dilemma. Before checking the cost of a KDJ11-EB you are advised to make sure pacemaker batteries are fully charged and any blood pressue medication has been taken. Take it from me the prices are so high they need to join the astronaut corps! I would like to get at least one of these historic systems running again. Suggestions please!! Rod Smallwood

19 years, 1 month

IBM floppy termination

by rcini＠optonline.net

All: I have a few IBM-labeled YE-Data YE-580 (320k/360k) half-height floppy drives. I can?t seem to locate a manual for these on-line so I wondered if they use the standard 150 ohm terminator or something else (the Teac uses 330 ohm for example). Any info appreciated. Thanks. Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.altair32.com http://highgate.comm.sfu.ca/~rcini/classiccmp

19 years, 1 month

Subject: Re: Manuals being scanned

by aek＠bitsavers.org

> they never find stuff on > bitsavers when you search for text. Very early on, I disabled all search engines from .pdf files on bitsavers' in the robots.txt file. Google is particularly bad about fetching documents over and over again.

19 years, 1 month

Tek 4051 on craigs list here in Seattle

by g-wright＠att.net

Listed with a Wang and others under computer and search vintage http://seattle.craigslist.org/see/sys/325631116.html - Jerry Jerry Wright JLC inc g-wright at attnet

19 years, 1 month

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2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb