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

Attend and Participate Information Security and Cyber Forensics (INFOSEC2017)

by radiotest＠juno.com

At 08:42 AM 6/10/2016, Joan Sali wrote: >I'm thinking this is a general discussion. This is a general discussion about classic computers. Will your conference address security needs of , say, CP/M computers of the 1980s, minicomputers of the 1970s, or mainframe computers of the 1960s? I suspect not, and if not the topic does not belong here and is therefore regarded by many of us as spam. Dale H. Cook, Roanoke/Lynchburg, VA Osborne 1 / Kaypro 4-84 / Kaypro 1 / Amstrad PPC-640 http://plymouthcolony.net/starcity/radios/index.html

10 years

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The life of Plastics

by rodsmallwood52＠btinternet.com

I just took my copy of RT11 mini reference (1985) off the shelf and the front cover fell off. Not through wear and tear but brittleness. I wonder what else is going to fall apart in the plastics line. Oh well at least I have the finest book cover repair material known to man to hand. What is it? Green packing tape! Rod

10 years

1
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Interlan DEC Ethernet boards

by billdegnan＠gmail.com

Other threads about DEC and Ethernet got me thinking....I have a couple of QBUS LSI Internal BD-NI2010A Ethernet boards. Anyone using these to connect to an Ethernet network on their system? It appears the ethernet address # is burned/hard wired into the card. Mine come from the University of Delaware. Bill -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

10 years

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vintage computers in active use

by hilpert＠cs.ubc.ca

A friend notice this in the news, I heard it mentioned on the radio this morning too: http://www.bbc.com/news/world-us-canada-36385839 extract: The report said that the Department of Defence systems that co-ordinated intercontinental ballistic missiles, nuclear bombers and tanker support aircraft "runs on an IBM Series-1 Computer - a 1970s computing system - and uses eight-inch floppy disks".

10 years

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TK50 and xxdp+

by rodsmallwood52＠btinternet.com

Hi I'm renovating a TK50 . Its on my 11/83 and if use the PDP-11 format disk the Identify function finds and lists it. There should be a TK50 exerciser among the xxdp functions somewhere anybody know which one? Rod

10 years

2
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Big announcement tomorrow night

by cctalk＠snarc.net

There's a big announcement happening from the Vintage Computer Federation tomorrow night. :) Stay tuned...

10 years

7
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IBM 3511

by wdonzelli＠gmail.com

So today I picked up something I had never seen before - an IBM 3511. This is a large tower expansion chassis for the PS/2 line. It looks very straightforward - but can any of you PS/2 fans comment on this? Was it an unsuccessful product? Low demand item? -- Will

10 years

4
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VAX-11/780 Board Set on eBait

by jnc＠mercury.lcs.mit.edu

> From: Devin Davison > well there goes my plan of trying to keep it under the radar. Sorry, I didn't mean to upset your plan (and you); I just didn't know if anyone was watching for VAX-11/780 parts, they come by so rarely. We have discussed this topic before, but let me recapitulate one point about pricing and valuations: if we want to stop this stuff being scrapped, we need to make sure the prices realized are well above scrap. This will have several consequences: i) If people only get low (scrap-region) prices, why go to all the bother/hassle of listing things on auction sites; just proceeed directly to 'Go'. ii) Hopefully, if values are non-trivial, the word will get around, and people who have this stuff will go to the effort to list it, instead of leaving it to moulder, etc. Yes, I understand that will make this a more expensive hobby, but TANSTAAFL. YMMV. Noel

10 years

4
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Trying to repair a Smith-Corona letter quality "printer"

by fozztexx＠fozztexx.com

I picked up a Smith-Corona Memory Correct 400 Messenger typewriter at Goodwill last week. It has the daisy wheel but no ribbon. I debated getting it since I already have enough retro stuff around the house, but every single time I?m at a Goodwill I look at all the typewriters to see if they have some kind of serial or parallel port. This one has a DE9 connector on the back which can be connected to a computer using an external box called a Messenger Module, which I also have. I plugged it in at the store and the typewriter didn't power up. They gave me 10 bucks off so I couldn?t resist and bought it. I?m hoping it?s an easy fix, but I can?t figure out how to get the thing apart at all! The four screws in the bottom just hold the plastic case to the metal frame, and removing them didn?t allow the case to come apart. I can?t figure out how to get the two plastic halves separated. There's no screws in the top and no other screws in the bottom. The plastic halves aren't welded together around the outside, I can wedge a screwdriver between them all the way around. There seems to be something holding the halves together near the four corners. Does anyone have any idea of how to get this thing open (without breaking the plastic)? I?ve searched all over the internet but I can?t find any scanned service manuals. The typewriter is from 1984 and was sold for $600 new so it doesn't seem to me like it would be a "disposable" item so there has to be a way to open it and service it. From what I can tell the 200/300/400 all use the same case, and the Memory Correct II/III use a very similar case, so info for any of those may help. I posted an album here: http://imgur.com/a/SxfTE and a YouTube video here: http://youtu.be/ryDl0Qvl7Gk Any assistance in opening the case without breaking it will be greatly appreciated! :-) -- Follow me on twitter: @FozzTexx Check out my blog: http://insentricity.com

10 years

1
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UNIBUS M9312 ROMS

by jnc＠mercury.lcs.mit.edu

> From: Jay West > some (me) are sticklers for original code. Is there possibly a listing of the code in a fiche, somewhere? Noel

10 years

1
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Updates to the Alpha Micro Phun Machine

by spectre＠floodgap.com

For those of you not on vcfed, yes, this is a real, live Alpha Micro Eagle 300 with AlphaTCP serving you information on the unusual Alpha Micro 68K systems and their peculiar DEC-like operating system, AMOS. New in this iteration is a lot of link cleanup, some custodial edits and a number of new downloads, including a tool for browsing ISO 9660 CDs and even a Rogue/Nethack port! http://ampm.floodgap.com/ (And if you don't believe it's an Alpha Micro:) http://ampm.floodgap.com/cgi-bin/systat -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Bowl angry. ----------------------------------------------------------------

10 years

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IO Selectric

by dave.g4ugm＠gmail.com

Folks I have today collect a recent E-Bay purchase. It appears to be an IO Selectric that has been left in a garage for a long period of time and is very gummed up. It will turn over with the manual handle, and it appears to try and type, but the carriage does not advance. All the tapes and chords appear to be in place. I have put some pictures here:- https://onedrive.live.com/redir?resid=277A0739F125010E!119461 <https://onedrive.live.com/redir?resid=277A0739F125010E!119461&authkey=!AGfg RGXKAjqDm7E&ithint=folder%2cJPG> &authkey=!AGfgRGXKAjqDm7E&ithint=folder%2cJPG sorry for the long link. Does anyone have any suggestions as to which manuals are appropriate, and which documentation was followed to allow it to be used as a printer? Dave Wade G4UGM

10 years

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PS/2 luggables I noticed for sale in Denver

by swiftgriggs＠gmail.com

I saw some retro gear on CL today. 20Mhz 386 PS/2 lookin' thing http://denver.craigslist.org/sys/5589047344.html which is this: http://www.computinghistory.org.uk/det/30497/IBM-Model-8573-121/ And this one: http://denver.craigslist.org/sys/5589142407.html which is this: https://en.wikipedia.org/wiki/IBM_PC_Convertible I'm not an IBM nut (sorry, I worked there too long). However, they are cool machines. Someone might be interested. -Swift

10 years

1
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Anyone with a Data General Eclipse S/230 out there?

by derschjo＠gmail.com

I just acquired a DG Eclipse S/230 in semi-decent condition. It's mostly complete with some fun peripherals in a gigantic rack. It'll be fun to get it going, but it's going to be a challenge -- the machine has been scavenged from here and there, I'm missing basic TTY I/O and controllers for the 8" floppy drive (and probably other things, too). Going over the boards, there's an IC on the "CPU 1" board that was somehow forcibly ripped from the PCB -- it looks like someone started clipping it off, then said "screw it" and yanked the thing off with pliers, leaving much of the leads leading up to the IC die. The PCB is undamaged, but I don't know what the IC is supposed to be. I suspect, based on what's surrounding it, that it's an SN74172J. The IC is located at position X3 (approximately, it covers more real estate than that). Anyone have a CPU 1 board from an S/230 they can check for me? There isn't much in the way of schematics for this that I can find... Thanks! Josh

10 years

4
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Restoring an RXV21 and/or an RX02

by rodsmallwood52＠btinternet.com

In my quest for a working RX02 I'm trying to find out the best way of checking out an RXV21 and get it talking to the RX02. I have most of the standard diagnostics including XXDP. The setup is an 11/83 with an RX50 and RD53. (I can boot from either) In the box is MSV11-J PMI KDF11-B RXV21 RQDX3 They are in the order as above. The two dual height modules are in the right hand side of the back plane when viewed from the front. I am unsure as if there is a utility for RXV21 among all the diags I have or should I go in with ODT on a halted system and look at registers. With the setup above I need to get the RXV21 going in order to check out the RX02. The precise syntax of any commands is important because presuming I may have prior knowledge is not a good idea. I may have known this stuff in the past but I cant remember if I did or not!! Rod

10 years

2
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Heathkit ETA-3400 vs. ETW-3400 confusion?

by tsw-cc＠johana.com

In following this thread, and taking in my "vast" Heathkit knowledge, I can only assume that the addition of a 'W' in the model number is to indicate a WIRED (at the factory) Heathkit. This may mean that the ETW-3400(a) is a wired version of the ET-3400(a). The difference that shows between the 'a' and non 'a' version is the space for four ram chips in the upper left visible corner of the PC board. The non-a version can have up to 4 ram chips (for a total of 512 bytes), but the a version has two 1024x4 chips, but only 512 bytes are available. Hope this answers some questions. (I have an ET3400-a version).

10 years

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11/[9]4 latest

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood > I discovered the RX211 needed to be in CDEF and not ABCD. Is _that_ what it was? I'd have never figured that out in a million years! I'm utterly amazed you didn't fry it - I forget whether the slot you plugged it into was a MUD (hex) slot, or one of the SPC slots (I know the 11/84 backplane has some MUD and some SPC, but I don't know about the /94, and I'm too lazy to look) - but there are some odd voltages on various pins. > If you try to boot the RX02 in 11/84 mode you get > ... > Unexpected trap to location 114 Well, 0114 is the 'memory system error' vector - i.e. parity, or un-recoverable ECC error. I'm a bit surprised you're getting that, as I'd have assumed the boot ROMs test all the memory. I'm too lazy to read the 11/94 and J-11 manuals to see what the 11/94 has in the way of registers that record memory issues (the 11/73 has, for instance, a Memory System Error Register at 17777744), but that's the next step. > R6 = 172276 That seems a bit odd - the stack pointer is pointing into I/0 space? 772276 is the last Supervisor mode Data space PAR - maybe it's using those registers as a temporary stack? Noel

10 years

6
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RXV21 and 11/94

by rodsmallwood52＠btinternet.com

Hi Having decided that the best way to get the 11/94 going was to sort out the RX02 and make sure I could boot from it. So back to the 11/83 make sure it boots of the RD53 - Yup RT11 Try the RX50 - Yup boots xxdp. Now then 11/83 - QBUS so an RXV21 to drive the RX02. But where to put it. Next to the RQDX3? After it? In front? Better ask: Knights of the most excellent order of Digital Techno Mages. Where does put ones RXV21 Next to the RQDX3? After it? In front? Rod Smallwood

10 years

3
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Fully working Woz-signed straight Apple 2 + Lee F.-signed Sol-20 for auction

by cctalk＠snarc.net

Vintage Computer Federation is doing some fundraising. We're auctioning a fully working and Woz-autographed straight Apple II * and * a fully working and Felsenstein-autographed Processor Tech Sol-20. Both computers are SUPER-CLEAN. Apple II: http://www.ebay.com/itm/191890608380 Sol-20: http://www.ebay.com/itm/191890605553 We're using eBay to maximize the value since we're a non-profit. Have fun!

10 years

1
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VAX-11/780 Board Set on eBait

by jnc＠mercury.lcs.mit.edu

Here: http://www.ebay.com/itm/282059544477 Low starting price. Noel

10 years

4
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Set of mystery DEC boards: who can help me identifying these?

by jnc＠mercury.lcs.mit.edu

> From: Pierre Gebhardt > I uploaded some Well, I don't know what they are, but a couple of things about that first board (the one that has the 3 blue Berg headers on it): It has jumpers for UNIBUS grants (both interrupt, and DMA). Which doesn't necessarily mean much, the various MK11/etc memory cards (M7984, M8728, M8750) have them too, and they _definitely_ don't plug into a UNIBUS. But this card has nothing connected to the CDEF connector pins, but it does to the AB, suggesting that whatever it is, it might go in a MUD slot? Someplace I have the pinout for the M9014/etc UNIBUS extenders (cards that plug into a UNIBUS in/out slot, and convert it to 3 40-pin flat cables), but I can't find it at the moment (I remember discussing it here, so maybe it's in the list archives). It would be interesting to see if this card has the same pinout. Noel

10 years

1
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Model M Key Cap Replacement

by earl＠baugh.org

> my real IBM clicky keyboard does not have usb so I tried various usb > adapters and they could be flaky,... > you would have to start computer then have to unplug and reinsert > keyboard connection etc... > > anyone have a solve for this? thanks Ed# Yes, if you look on ebay, there is at least one person who makes cables that snap into the IBM Model M plug with USB, I believe it has some sort of in-line electronics near the plug. It's worked flawlessly with the various Model M's I've used it with (and bought some more, all work great). I used it on '86, '89, '91 ones. BTW, I can confirm that Unicomp did buy the molds, etc. from IBM/Lexmark. (spoke to the owner during a call a while ago...) The "innerds" they make are form identical to ones that came from IBM. I can confirm this in that here at work I bought the "guts" and some Mac keycaps (guts with the USB cable hard-wired... that's the only difference) And found an old Model F (which was a UK version of a model M, not sure what else was difference) and the guts dropped in. I did cut off the tabs to allow for the additional keys next to the space bar. This works out because the mold had a cross-beam where the tabs connected to the bottom edge, so you can get a smooth even edge without much cutting, etc. That's the only shortcoming I've found from Unicomp, the "enclosures" are light weight, and definitely not the same plastic as IBM (in composition or weight). So a case from a donator model M fixes that problem. (usually run the case thru the dish washer before to get it squeaky clean... yes, my wife lets me do that, as long as I'm not running dishes too... she's a keeper :-) ) Earl p.s. If you do ever order the "guts" (not sure if they still do that or not, make sure you indicate what you want on the keycaps... I didn't mention and got completely BLANK keycaps... works for me since I'm a touch typist, but had me laughing.... and I did have plenty of spare caps, so put normal ones on and have the blanks in the parts bin)

10 years

1
0
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KY11-LB drawing error

by jnc＠mercury.lcs.mit.edu

> it turns out there's an error in the KY11-LB drawings. > ... > I have 'fixed' a copy of that page from the print set, and will (soon) > issue an updated PDF. OK, I finally got a round tuit; new version here: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/MP00015_KY11-LB_Jan78.pdf (same place as the old version, now deprecated). Noel

10 years

1
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11/[9]4 latest

by jnc＠mercury.lcs.mit.edu

>> Unexpected trap to location 114 > Well, 0114 is the 'memory system error' vector - i.e. parity, or > un-recoverable ECC error. > ... > I'm too lazy to read the 11/94 and J-11 manuals to see what the 11/94 > has in the way of registers that record memory issues Finally found a moment to take a gander at that: The KDJ11-E memory seems to be parity only, not ECC. There's a Parity CSR at 17772100, which will tell us if a parity error was detected in the main (on-board) memory. There's also a Memory System Error Register at 17777744, but that's only there for backward compatability, and I'm not sure it will tell us much. It might also be good to look at the system CSR at 17777526, which will tell us if the firmware has set the memory size to how much memory is actually on the machine. There does not appear, alas, to be a register that indicates _where_ the parity error happened. However, if it's happening regularly (and still, as in 'problem disappeared in the process of diagnosis') we should be able to work out where it is. Although I'm still somewhat astonished that a persistent parity error wasn't picked up by the self-test on power-on. > From: Rod Smallwood > If we look at what an 11/94 is then its a single board CPU ... in a > three slot back plane. There after its UNIBUS So is there any thing we > can put in the spare QBUS slot without doing any damage? In theory, you should be able to plug most QBUS boards into those slots (although if there are QBUS cards that barf in a Q/CD slot, one couldn't use them - I can't recall if any such exist, though), but... no device board is going to work properly since the two QBUS bus grant lines (BDMG and BIAK) will be wired past those slots, directly from the CPU to the KTJ11. On the 11/84 backplane, there are a couple of jumpers that _can_ send the bus grants through the 'QBUS' slots on the 11/84 backplane (so _in theory_ one should be able to plus QBUS devices into those slots, and have them function correctly, when those jumpers are set appropriately, but we have yet to confirm that), but I don't know if the /94 backplane has anything similar. Alas, there are no 11/94 prints online (that I know of) to confirm that. > I found not one but two RXV21 RX02 controllers. So I'll give them a try > in the 11/83 and see what happens. I'll soon know if the RX02 is good > or not. Excellent! The more known good, working components we have to play with, the better! Noel

10 years

1
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CAPLIN CYBERNETICS HXIQ and HXIDL

by rodsmallwood52＠btinternet.com

Hi Whilst sorting through my board collection I found a pair of dual height DEC style modules. CAPLIN CYBERNETICS HXIQ It looks like a ST interface (data and control connectors). But here's the kicker. Its got a transputer chip on it. The two connectors are wired to the second board (CAPLIN CYBERNETICS HXIDL) that has what looks like a flat cable SCSI connector as output. It looks like it was made in the UK (some RS Components parts) about 1992 by the date codes. Any ideas on this one guys. Rod

10 years

2
3
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USB Keyboard Adapter (Was: Model M Key Cap Replacement)

by COURYHOUSE＠aol.com

will check it out! Thanks ed# In a message dated 6/6/2016 10:30:03 P.M. US Mountain Standard Time, halarewich at gmail.com writes: this one also works really well https://sewelldirect.com/active-usb-to-ps2-adapter $6.95 us<div id="DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2"> href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_c ampaign=sig-email&utm_content=webmail" target="_blank"><img src="https://ipmcdn.avast.com/images/2016/icons/icon-envelope-tick-round-ora nge_184x116-v1.png" height="29px" /> Virus-free. href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…" target="_blank" style="color: #4453ea;">www.avast.com _height="1">_ (mip://0c080b80/default.html#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2) </div> On 6/6/16, Todd George <todd.george at gmail.com> wrote: > Ed: > > I've used Soarer's Mod which is built around the excellent Teensy 2.0 or > Teensy++ 2.0. I've had great success on quite a few Model M keyboards with > this mod. You can do a very clean internal mount as well on certain Model > M keyboards. > > https://geekhack.org/index.php?topic=17458.0 > > Hope this helps! > -Todd > > -----Original Message----- > Date: Sun, 5 Jun 2016 12:51:17 -0400 > From: COURYHOUSE at aol.com > Subject: Re: Model M Key Cap Replacement > >> my real IBM clicky keyboard does not have usb so I tried various usb >> adapters and they could be flaky,... >> you would have to start computer then have to unplug and reinsert >> keyboard connection etc... >> >> anyone have a solve for this? thanks Ed# > -- Chris Halarewich

10 years

1
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USB Keyboard Adapter (Was: Model M Key Cap Replacement)

by COURYHOUSE＠aol.com

thanks I will look at this thanks!' Ed# In a message dated 6/6/2016 9:57:48 P.M. US Mountain Standard Time, todd.george at gmail.com writes: Ed: I've used Soarer's Mod which is built around the excellent Teensy 2.0 or Teensy++ 2.0. I've had great success on quite a few Model M keyboards with this mod. You can do a very clean internal mount as well on certain Model M keyboards. https://geekhack.org/index.php?topic=17458.0 Hope this helps! -Todd -----Original Message----- Date: Sun, 5 Jun 2016 12:51:17 -0400 From: COURYHOUSE at aol.com Subject: Re: Model M Key Cap Replacement > my real IBM clicky keyboard does not have usb so I tried various usb > adapters and they could be flaky,... > you would have to start computer then have to unplug and reinsert > keyboard connection etc... > > anyone have a solve for this? thanks Ed#

10 years

1
0
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USB Keyboard Adapter (Was: Model M Key Cap Replacement)

by todd.george＠gmail.com

Ed: I've used Soarer's Mod which is built around the excellent Teensy 2.0 or Teensy++ 2.0. I've had great success on quite a few Model M keyboards with this mod. You can do a very clean internal mount as well on certain Model M keyboards. https://geekhack.org/index.php?topic=17458.0 Hope this helps! -Todd -----Original Message----- Date: Sun, 5 Jun 2016 12:51:17 -0400 From: COURYHOUSE at aol.com Subject: Re: Model M Key Cap Replacement > my real IBM clicky keyboard does not have usb so I tried various usb > adapters and they could be flaky,... > you would have to start computer then have to unplug and reinsert > keyboard connection etc... > > anyone have a solve for this? thanks Ed#

10 years

2
1
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AT&T

by sales＠elecplus.com

Who was it has the AT&T, wanted the books and disks? I just found the 5.25" floppies for AT&T for the C compiler, Pascal, etc. Maybe it was Seth? Cindy Croxton Electronics Plus 500 Pershing Ave. Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com AOL IM elcpls

10 years

3
2
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Not able to post to the list

by pdaguytom＠gmail.com

Checking to see if I am now able to post to the list. Tom

10 years

2
1
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Xerox Star Software Images Available

by g-wright＠att.net

I have put up my Xerox Star Disk Images here. Now,? does anyone have the service manualsthat? are complete. seems what I have in missing most of the latter part.? Will be up for a few days. Jerry https://dl.dropboxusercontent.com/u/104392233/XEROX_Star_SW.zip

10 years

3
4
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Need Rec: Book to teach about computers and BASIC at an eight year old level

by cctalk＠ibm51xx.net

So somewhat OT - I've setup an 8 year old w/ an IBM PC XT w/ CGA. To say he is less than impressed is understating things :). However, I am determined that he will learn basic computer terminology, architecture, history (i.e. how we got here) and at least get his feet wet with programming by learning BASIC this summer. Apparently teaching is not my strong suite - while I can talk about a larger number of the above topics, especially at his level, organizing them in a way to make sense is the problem. I was wondering if anyone could recommend a good book that gets the basic stuff out of the way (what is the CPU, memory, storage, etc. what are different the parts called, etc.) and maybe another one that teaches an intro to BASIC written for a very young reader? It would be nice if the book is in the PD or at least available as a PDF that way he can read it on his Kindle. However, I am not averse to buying a physical new (or used book) either. Thanks. -Ali

10 years

16
31
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Deth Specula and SCO

by dave＠661.org

Once upon a time there was a band made up mostly of SCO employees called "Deth Specula". Their heyday was in the early to mid 1990s. Does anyone remember 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?

10 years

1
0
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Resurrecting the DB-19

by COURYHOUSE＠aol.com

funny.... we used to end up with cables with these things on them and .... hope they got saved in one of the aux buildings...ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 6/5/2016 9:33:45 P.M. US Mountain Standard Time, nf6x at nf6x.net writes: > On Jun 5, 2016, at 14:02, Alexandre Souza <alexandre.tabajara at gmail.com> wrote: > > http://tabajara-labs.blogspot.com.br/2015/05/fazendo-o-expletiva-cabo-da-du… > > Better than nothing :) Nice hack! Too bad that Noy guy defaced his computer. :D -- Mark J. Blair, NF6X <nf6x at nf6x.net> http://www.nf6x.net/

10 years

1
0
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Heathkit ETA-3400 vs. ETW-3400 confusion?

by drlegendre＠gmail.com

Which is the correct model number for the I/O & memory accessory for the Heath ET-3400(A) trainers? I see ETA-3400 and ETW-3400 used interchangeably. For instance, the d/l manuals refer to the unit as ETA-3400 but many (most?) units, mine included, are screened ETW-3400 on the case. Anyone know what gives with this? Are there actually two different models or revisions, as with the ET-3400 and ET-3400A? Also, is there a way to tell if a Heath piece is factory-built? My recently-acquired ETW/A-3400 has a board which almost +must+ have been wave soldered and washed. It has no traces of home-assembly. Likewise, the rest of the build is top-notch and looks like factory work.. Thoughts? PS Still need a 2x20 header (like 40pin IDE) to complete this project. Anybody got a spare?

10 years

2
4
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Resurrecting the DB-19

by cctalk＠ibm51xx.net

Sweet. No where can I order 10 or so at a reasonable price? There is a guy one ebay selling one with hood at $22 a piece.... -------- Original message -------- From: Liam Proven <lproven at gmail.com> Date: 6/5/2016 1:55 AM (GMT-08:00) To: "Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Resurrecting the DB-19 June 4, 2016 ? 10 comments *DB-19: Resurrecting an Obsolete Connector* Oh man, this is good! You?re looking at the first DB-19 connector to be made in the 21st century... http://www.bigmessowires.com/2016/06/04/db-19-resurrecting-an-obsolete-conn… -- Sent from my phone - please pardon brevity & typos.

10 years

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PDP-12 Restoration at the RICM

by michael.99.thompson＠gmail.com

We fixed the RK05 disk this week. We replaced E3 (LM301A) and E1 (SN7404) on the G938 Servo Preamp module. The COUNT PULSE FWD H and the COUNT PULSE REV H signals from the G938 module are both working now. The drive will now seek correctly using the jumpers described in the Maintenance Manual or using seek-only instructions from the RK8-F controller. We tried the OS/8 and LAPS-DIAL bootstraps, but the processor just halted. The first page of core that was read from the pack contained a repeating sequence of 2525-5252. Either the pack was used as a data-only pack, or diagnostics were run on the pack. During the week I will use SIMH to make a PDP-12 bootable OS/8 RK05 image. Next week we will use dumprest to make an image of the disk pack, and then write OS/8 to the pack. -- Michael Thompson

10 years

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Model M Key Cap Replacement

by COURYHOUSE＠aol.com

my real IBM clicky keyboard does not have usb so I tried various usb adapters and they could be flaky,... you would have to start computer then have to unplug and reinsert keyboard connection etc... anyone have a solve for this? thanks Ed# In a message dated 6/5/2016 9:51:17 A.M. US Mountain Standard Time, COURYHOUSE at aol.com writes: my real IBM clicky keyboard does not have usb so I tried various usb adapters and they could be flaky,... you would have to start computer then have to unplug and reinsert keyboard connection etc... anyone have a solve for this? thanks Ed#

10 years

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Model M Key Cap Replacement

by COURYHOUSE＠aol.com

Chuck! That would be great! Perhaps yours had newer brains in it than my couple as mine have some years on them. if you still have link to vendor that would be good too. My clicky keyboard is off the tower so it has a long cable on it! I love this keyboard! In a message dated 6/5/2016 11:57:36 A.M. US Mountain Standard Time, cclist at sydex.com writes: On 06/05/2016 10:09 AM, COURYHOUSE at aol.com wrote: > > my real IBM clicky keyboard does not have usb so I tried various > usb adapters and they could be flaky,... you would have to start > computer then have to unplug and reinsert keyboard connection > etc... > > anyone have a solve for this? thanks Ed# I use a no-name cheapie keyboar+mouse adapter that looks like a "y" cable more than anything. Works fine on USB for both. I think I paid about $2 shipped from China. I can get the chip ID if you'd like, but that assumes that you can find another like it. --Chuck

10 years

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U320 Drives Show up on Wrong Target ID?

by alexmcwhirter＠triadic.us

So in short i have six identical drives. Same manufacture, model, and firmware. Three of them work fine, the other three also work fine but they always show up as the wrong target. For example i have a Sun D1000 storage array with 12 slots (targets 0-11). It doesn't matter what slot you put them in, these three drives always have the same target number. One is target 8, on target 4, one target 2. I doesn't matter one of the drives is by itself or together with other drives. Take the disk that always shows up as target two for example. If you place this drive in slot zero, then place a normal working drive in slot 2, and finally attempt to write data to target 2 both drives will get the write. The same effect also applies to reads. If you boot an OS with the drives in this configuration you will usually get a panic. I can verify the same behavior on my Sum V210 and Dell PE 2850. This is such a bizarre way for a disk to act / fail. Has anyone ever seen this before?

10 years

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Interesting Material - BOTH on topic and off topic

by jhfinedp3k＠compsys.to

I expect that everyone on this list knows about most of the tools to communicate. Many also use these tools and understand how much easier communication has become as a result. https://uniteyouthdublin.files.wordpress.com/2015/01/here_comes_everybody_p… What is probably not clear is the extent to which these tools have revolutionized how easy it is for groups to be effective. This is the first time I have felt it is useful to draw attention to a book, especially since the PDF can be downloaded so easily for those of you who have the hardware. For myself, I prefer a dead tree version and have been reading the copy I borrowed from the library. Comments on if this book is useful would be appreciated. Jerome Fine

10 years

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Model M Key Cap Replacement

by COURYHOUSE＠aol.com

my real IBM clicky keyboard does not have usb so I tried various usb adapters and they could be flaky,... you would have to start computer then have to unplug and reinsert keyboard connection etc... anyone have a solve for this? thanks Ed# In a message dated 6/5/2016 5:28:10 A.M. US Mountain Standard Time, chris at micromuseum.co.uk writes: I've been using a Unicomp model M alongside an IBM model M for about a year now and I find there is no noticeable difference between them at all. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Liam Proven Sent: 05 June 2016 12:33 To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: Model M Key Cap Replacement On 2 June 2016 at 23:45, Ali <cctalk at ibm51xx.net> wrote: > > Does anyone know if IBM produced any Model M KBs w/ post windows 95 keys (I know I know an abomination!)? You know windows key, right click key, maybe power/sleep buttons that would have interchangeable caps? The "Windows" key is the same as "Super" on Sun keyboards, and there's an equivalent for the right-click or "application" key as well. So they weren't MS innovations; actually they were MS /replacing/ keys that IBM's design omitted. As such, my "anti" stance on them has softened considerably. :?) Yes, I believe there are Model-M clones with them. However, one friend bought a Unicomp type clone "Model M" clicky keyboard and both he and I were very disappointed with its build quality. Me, I stick to genuine retro parts. I have a small stock of them -- half a dozen -- which is probably enough for the rest of my life! :-/ The power/sleep key you mention is /not/ a standard key, AFAIK, and no I don't think most clicky keyboards have one. -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R) --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

10 years

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11/04 latest

by rodsmallwood52＠btinternet.com

Hi Well lots fun with the 11/94 project. In fact its become an 11/84 and 11/94 project. After following Sherlock Holmes advice "when you have eliminated everything else.Whats left however unlikely is the answer" I discovered the RX211 needed to be in CDEF and not ABCD. Why did I not know that? Well I can only put it down to the fact all of the UNIBUS options I ever worked with were hex modules. Next fascinating fact. You can switch between being an 11/84 and an 11/94. Although one box has three Qbus slots and the other (11/84) has four. If you put an 11/84 CPU in slot 1 and a MSV11-J (PMI) in 2 or 3 it does its startup tests and goes into the monitor screen. If you try to boot the RX02 in 11/84 mode you get (the drive does get accessed - there's a nice healthy clonk) Trying DY0 Error 101 Unexpected trap to location 114 See troubleshooting documentation Updated PC 173260 PCR Page = 62 Program listing address = 062260 R0 = 000000 R1 = 177170 R2 = 042131 R3 = 000000 R4 = 024000 R5 = 000000 R6 = 172276 R7 = 001600 In 11/94 mode it stops at the same point but does not give the error message. Comments gentlemen please Rod Smallwood

10 years

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VR241 Service Manual?

by robert.jarratt＠ntlworld.com

Does anyone have a VR241 Service Manual? I have looked on Manx and BitSavers, but there doesn't seem to be one available in those places, and a more general search has failed to turn up anything either. Thanks Rob

10 years

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Re: thinking of the "ultimate" retro x86 PCs - what bits to seek/keep ?

by barythrin＠gmail.com

I'm a bit surprised at the recommendation of Dell but maybe they weren't playing all their proprietary games yet. I've seen where they rewired a nonstandard power connector so you'd fry it replacing it with a standard power supply or fry your other system using one of their power supplies but can't remember if that was at or atx. Seen where they did something stupid and notched their ram so it had to be registered memory. So long ago i don't remember the details though. Not to mention weird custom firmware on parts they didn't build which caused driver and functionality nightmares for 3 sound blaster cards i bought (at a bargain) but had to return all 3 for various odd reasons.? Either way. They quickly became a vendor i lost trust in but maybe lots of vendors also did that and i just ended up working on their problems the most.? Mca and vlb cards are harder to come by and fetch a higher price range vs isa/Eisa or pci.? Definitely stay away from Cyrix processors. Most computer stores i knew in the 486 era wouldn't even sell them or take them as trade ins. Comparability issues and overheating seemed to be common features.? Interesting comments on parallel drives. They're nice for compatability on multiple systems but much slower than their scsi sisters. I did both but didn't realize the huge transfer speed difference until i had traded away my scsi version for a box o' gear then later traded some of that to get a parallel zip drive again. But on the bright side most of my systems could use it or share it over null modem.?

10 years

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Resurrecting the DB-19

by lproven＠gmail.com

June 4, 2016 ? 10 comments *DB-19: Resurrecting an Obsolete Connector* Oh man, this is good! You?re looking at the first DB-19 connector to be made in the 21st century... http://www.bigmessowires.com/2016/06/04/db-19-resurrecting-an-obsolete-conn… -- Sent from my phone - please pardon brevity & typos.

10 years

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Macintosh Quadra 840AV

by lists＠sysop.ca

I managed to pick up a Mac Quadra 840AV yesterday with an apple VGA monitor and Laser Writer II printer for $60 CAD (approximately $5 USD :-) off the local classifieds site. The pram battery had leaked pretty badly but seemed to only drip onto the internal RF shielding. After I cleaned everything up with isopropanol it booted fine off a startup floppy although the hard disk appears to be bad. Like most macs of this vintage it does seem to have leaking surface mount caps so I am going to order the standard tantalum replacements from digikey and recap the mainboard. What is everyone doing for replacement 50 pin SCSI drives in their 90's hardware? Is there a reasonably priced flash based replacement yet? I remember looking into it a few years ago for my Sun IPX and the only solutions I could find seemed to be priced for industrial applications. Also, has anyone had experience with the apple power supplies of this vintage? I'm wondering if it's something I should recap as well? Also, any comments as to which classic mac OS version is best for this era of hardware? I haven't played around with classic macs much, I went right from the Apple IIe to PC's in the early 90's.

10 years

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Correction

by rodsmallwood52＠btinternet.com

Previous email for 11/04 read 11/94 Rod

10 years

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Seeking Deth Specula's stuff

by dave＠661.org

Does anyone know where and how one can obtain copies of Deth Specula's work? It seems that all that's available is what I find at bandcamp.com and some weird hiphop website, about six songs in all. -- 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?

10 years

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AT&T 3b2 vs SCSI2SD drive replacement

by other＠oryx.us

We have recently had activity on the list discussing AT&T 3b2 related stuff, then earlier today we have had discussions concerning the SCSI2SD drive replacement hardware. I was reviewing the online documentation for SCSI2SD, specifically here: <http://www.codesrc.com/mediawiki/index.php?title=SCSI2SD> and I specifically see that the AT&T 3B2/600 is supported. Many years ago, when I was administering 3b2's, I had always remembered those 327 Mb drives were a PITA getting those replaced thru my supply system. ...... Wondering if anyone here is using SCSI2SD on their 3b2's, and if so, what are your experiences? Hopefully working well? Jerry

10 years

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