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

Houston Computer Museum Warehouse Liquidation

by tsraguso＠gmail.com

I have seen multiple posts over time speculating about flooding in the warehouse. I would like to assure everyone that the warehouse has never flooded, and that any posts to the contrary are inaccurate or greatly exaggerated. I have cleared a significant area inside the warehouse and have not seen any indications at all of floodwaters entering the building. Additionally, the landlord has also confirmed that the building has never flooded. The only moisture-related damage that has occurred at all happened to paper articles in direct contact with the cement floor (The floor is bare cement, and gets moist during heavy rains). Such items have all been discarded. The computers, even those that touched the ground, are undamaged. If I were to find a computer with water damage, it would be clearly labeled as such when being sold. If you have any questions, please email me directly, and I will gladly answer them to the best of my knowledge. Thomas Raguso

6 years, 4 months

5
4
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cctalk Digest, Vol 62, Issue 19

by athornton＠gmail.com

I might have had something to do with https://www.sinenomine.net/products/vm/njeip And as far as I remember, at least some of it was BSD licensed, so if that's what floats your boat...knock yerself out.

6 years, 4 months

2
1
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TRS-80 Model III and IV parts needed (keycaps, keyboard switch, ribbon cable, floppy drive parts)

by rescue＠hawkmountain.net

So, on this Model III I'm working on the following keycaps are missing: 1/! key right shift key Looks like keycaps from a Model III, and possibly a model I would work. Probably a Model IV keycap for 1/! would work, but I think the right shift key would be different between a Model III and Model IV. I also need one of the ALPS switches as the '+' part of the stem is broken off. In addition, on the drive (Texas Peripherals), there is a plastic component that screws onto the aluminum arm with the diskette retaining hub with 2 screws.... it then accepts two plastic pins that connect this piece to the drive door. I am missing on of the plastic pins and the plastic piece is cracking. Anyone have any of these parts kicking around. On a Model III upgraded to a Model IV I have, the ribbon cable to the serial/com board has 'self destructed' as the glue failed, so once removed it could not be reconnected. Interestingly the cable for the floppy controller did not deteriorate ????? Sadly on the upgraded Model III someone converted it to 3 drives, using an original full height drive for the 1st drive (at the bottom), and put 2 HH drives in the top bay. To make room for the eject control on the top drive, the upper case has been notched. It would be nice to find an upper case for a Model III and do away with that notch.... or alternately an empty Model IV case (top and bottom). Thanks to anyone with any TRS-80 'parts vault' that may have these parts available.... It has been a long time since I have touched a Model I/III (last time was probably 1983 :-) ). Looking forward to getting the 3 systems I have up and running (Model I with Expansion, Model III, and a Model III upgraded to a Model IV). Thanks in advance, -- Curt

6 years, 4 months

2
2
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3270 controller simulation

by aek＠bitsavers.org

https://deskthority.net/viewtopic.php?f=55&t=21558&p=442092#p442092 if you look at the pictures from april, they have an arduino talking to a 3278 any ideas who 'ajk' in austin might be?

6 years, 4 months

16
59
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UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

by j_hoppe＠t-online.de

Daniel, >> >> Yes, can (get a kit with SMT work done) > > OK, that?s the answer I needed; > If I want to put one of these in a KS10, can the parity lines be hacked from the software > (the KS10 uses them as two extra data bits) or are they hard-wired to parity? Several people asked to make UniBone PDP-10able, it should be not problem. UNIBUS PA,PB are (like all other signals) just pins on a GPIO multiplier, no interpretation is done in hardware. On software side the PRU must sample 18bit instead of 16bit for DATA, then lots of "uint16_t" must be changed to "uint32_t" in the whole software stack. Not clear what to do with existing device emulators: did DEC construct 18bit mutants for a few PDP-11 peripherals to run them in KS10? UNIBUS on a PDP-10 makes only sense to me if the big pool of PDP-11 peripherals can be used directly. regards, Joerg

6 years, 4 months

2
1
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message from andrew (was 3270 controller simulation)

by aek＠bitsavers.org

-------- Forwarded Message -------- Subject: 3270 controller simulation Date: Mon, 18 Nov 2019 19:43:24 -0600 From: Andrew Kay To: aek at bitsavers.org Hi Al, I'm waiting for approval to join the cctalk mailing list but I heard on IRC you were interested in my project so hope you don't mind me reaching out to you directly. Unfortunately I don't have much in the way of useful documentation other than the code itself right now - I am planning on putting some documentation on the protocol together as well as a basic write-up on what I've discovered. Anyway - everything I've built so far can be found at https://github.com/lowobservable/oec and the linked projects (for the coax interface and TN3270 library). It's still pretty basic at this point but can do enough TN3270 and VT100 emulation to be usable. Here is a more recent photograph showing it connected to the Master the Mainframe server - https://i.redd.it/1kpbe3muvbz31.jpg. For the coax interface I'm using two obsolete ICs from National Semiconductor - the DP8340 and DP8341 and using an Arduino to connect these to a PC. I was really excited to see somebody on the mailing list mention they were working on an FPGA interface - building an interface that didn't depend on obsolete components is my plan for next year but I have to learn some electronics first. Please feel free to copy the above to the mailing list - I definitely want to join (do you know if it is possible to join with a GMail account, the last I heard was I was waiting to be approved), I had no idea there were so many people interested in 3270 things :-) Andrew

6 years, 4 months

2
1
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Question about "Distributed" in the DFT name.

by cctalk＠gtaylor.tnetconsulting.net

On 11/18/19 11:10 AM, Paul Koning wrote: > Open systems may be distributed, distributed systems may be open, but > they are not synonyms. Okay. Fair enough. I don't think the people using "Open Systems" as in Mainframe vs Open Systems vs Wintel were differentiating between "open" vs "distributed". > For example, I'm not sure anyone would call VMS an open system, yet > clearly it's distributed (VAXcluster). What is "open" in this context? Is it open source? Is it open communications protocols? (As in OSI / POSIX.) Is it something else? I suspect that OpenVMS qualifies as the OSI / POSIX meaning of "open". ;-) But OpenVMS is decidedly not open source. OpenMVS (a.k.a. USS) on the mainframe comes to mind too. }:) -- Grant. . . . unix || die

6 years, 4 months

2
1
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Conitec GRIP and GRIP-Color

by holm＠freibergnet.de

Hi all, Some time ago I've got from a friend a defective ECB Bus Card named GRIP-4, that's a ancient Z80 based graphic display controller Card using the MC6845/HD6345 CRT Controller made by the (still existing) german Company Conitec in the 80s. Additional I've got an empty extension PCB called Grip-Color..the for color needed Memory, shift and palette registers. I've phoned the CEO from Conitec in the meantime and he will send the paperwork regarding the GRIP-4 that he still could find to me for scanning, unfortunately he couldn't find anything for the Grip-Color card. I have a running ECB bus system with an REH-CPU280, an Z280 based System that could run CP/M-3 and UZI280, has an FDC on board and an IDE Interface with an 128MB Flash disk, I whish to extend that with the GRIP Cards.. Is here someone that could please provide some Information related to the Grip-Color Card? I think I've repaired the GRIP-4 in the meantime (still have to connect an CRT, just replaced the FBT [different Model and Make] in the Monitor that I want to connect), but the oscillograms are looking good. I whish complete the Grip-Color card, any helpful information is welcome, even a picture where I can see which ICs are soldered in. https://www.z80cpu.eu/mirrors/oldcomputers.dyndns.org/public/pub/rechner/co… Thanks in Advance, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 info at tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741

6 years, 4 months

1
0
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RD54 jumper settings and cable settings

by cz＠alembic.crystel.com

Finally got my xxdp+ floppy in the mail. The RX50 is flakey (probably needs a head cleaning, 95% isopropyl safe on these heads?) but I have it booted. Problem is in the RQDX3 formatter the drive shows up as drive 0, but generates an FCT write error. Questions: 1) I assume all cables in the BA23 chassis should have pin 1 to the left (away from fans), correct? 2) On the RD54 should it be jumpered as drive 1, or drive 4, or something in-between? 3) On the BA23 panel I assume the ready light should be on, the ready buttom for the RD54 should not be pressed, and the write protect light should be off with the write protect button not pressed, correct? One step at a time, as they say.... C

6 years, 4 months

1
0
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FPGA based 3174 replacement

by cw＠cfsimmons.com

I have made the module available at https://github.com/cwsimmons/raw3270 For now it probably looks like a mess, but I hope to add comments and build the coax circuit later this week. I just wanted to get it out there now since I know there is interest. Chris

6 years, 4 months

1
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3270 controller simulation

by cctalk＠gtaylor.tnetconsulting.net

On 11/18/19 3:14 PM, Ethan Dicks wrote: > I could fill books about the topic... we sold hundreds of Unibus and Qbus > boards (and a few VAXBI boards) for bisync, and dozens of boards for SNA. ~chuckle~ > I have all the hardware and software and documentation from Software > Results, but there is nobody left out there to talk Bisync to. I wonder if some of the people in the mainframe community would be interested in running Bisync. But I don't know what sort of hardware interface would still be usable. :-/ There's work afoot to create a new BITNET. But I think that's using NJE, likely across TCP. -- Grant. . . . unix || die

6 years, 4 months

1
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RX01 wants

by fritzm＠fritzm.org

Hi all, I recently picked up a ?tabletop? RX01 drive for cheaps. So now I?m in the market for: - RK11 controller - cables - rack ears, rails (how was this done?) - formatted media If anybody here might have any of this and like to work out a deal, feel free to let me know off-list! thanks much, ?FritzM.

6 years, 4 months

7
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Houston Computer Museum Warehouse Liquidation

by tsraguso＠gmail.com

I have located the Cray Y-MP EL, in addition to other other interesting items, including an Intergraph 6400 workstation with tablet, a PDP-11/23, an IBM System/34 with 5251 terminal and keyboard, a Unisys A-Series mainframe, and a Symbolics 3640 Lisp machine (includes console, but there is no keyboard). Pictures can be found here: https://photos.app.goo.gl/rgkBddeuosjnJ3TC6 I am taking offers on all of the above listed items. Thomas Raguso

6 years, 4 months

3
2
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Rechargeable Gum Stick Batteries

by cctalk＠ibm51xx.net

I am just wondering if anyone out there has a source for cheap but reliable Rechargeable "gum stick" batteries. I am trying to replace some old batteries and the only source I could find are these: www.amazon.com/dp/B0047ZW46C/. Not sure on quality of the generic green batteries, especially since they are going to be in a computer on an ISA card and not easily visible. TIA! -Ali

6 years, 4 months

1
0
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Question about "Distributed" in the DFT name.

by cctalk＠gtaylor.tnetconsulting.net

On 11/18/19 9:47 AM, Jay Jaeger via cctalk wrote: -- Grant. . . . unix || die

6 years, 4 months

3
5
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FPGA based 3174 replacement

by cw＠cfsimmons.com

As it happens I wrote a Verilog module last week for serializing and deserializing 3270 coax frames, without realizing someone had already done this with an arduino. What I?ve written is intended for a zynq device but is general enough to be used in other designs. At the moment I have petalinux installed and can send frames with a small test program and see them on my scope. A loop back configuration also seems to work. I haven?t build the coax driver circuit yet so I can?t be sure of it?s correct operation. I?d be willing to make this code available tonight. Although I?m not sure how many people have the right hardware lying around. Chris

6 years, 4 months

4
4
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old PDP/DEC PSU hardware question

by iain＠csp-partnership.co.uk

I have a query out on VCFed, but I am not gettin gany interest. Neither did my 2015 request on a similar topic - must be the wrong forum. Advice please: where is the best place to get some troubleshooting tips on debugging a DIGITAL H7202B power supply? I have 2 supplies that are giving me trouble. I am competent at digital work, much less so on switch-mode and analogue (555 is an analogue in my books!). I have variacs scopes, logic analysers, voltmeters but no skill ;-( Any advice?

6 years, 4 months

3
2
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UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

by j_hoppe＠t-online.de

Its been a long time since last public post about UniBone, time for a bragging broadcast. *What it is:* In case you forgot: UniBone is a plugin board to DEC PDP-11 UNIBUS systems containing a BeagleBone Black. See http://retrocmp.com/projects/unibone. This combo can simulate PDP-11 devices embedded in a physical machine. So you can operate and repair incomplete UNIBUS PDP-11s and even VAXes, just by emulating the missing parts. Disk drive emulators accept SimH image files, which can be ftp'd to the emulator (no SDcard changing!). As UniBone can acquire bus mastership, its also UNIBUS diagnostic console, as well as stimulate individual UNIBUS lines. Realtime stuff is implemented on BBB's PRU coprocessors. All programming is done in plain C/C++ under mainstream Debian Linux. *Whats new in 2019:* UniBone started with memory and RL11/RL02 emulation. In 2019 we did a lot of programming and debugging (suppressing endless techno-babble here). Thanks to some gifted supporters, we have now these devices: - DL11 serial port (first concept by David Richards) - 11/20 CPU (Angelo Papenhoff) - RK06 and MSCP disk drives (Josh Dersch) In fact UniBone implements now a complete PDP-11 system... a bit like a SimH with UNIBUS interface. UniBone was tested (at least) against PDP-11/05, '34, '44, '84 and VAX 11/750. Verified OSses include XXDP, Unix V6, 2.11BSD, RT11, RSX11M/M+, VAX 4.3BSD and Ultrixes. Special thanks to Mark Matlock for endless testing. *Available?* Soon. About 25 complete systems were distributed, and the same amount in kits. Not much complaints. User group at https://groups.google.com/forum/#!forum/unibone Just now I'm planing for a 2nd lot. And it will be shown on http://vcfe.ch/doku.php in Zurich on Nov 30th/Dec 1st, probably plugged into a PDP-11/05. best regards, Joerg

6 years, 4 months

9
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UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

by j_hoppe＠t-online.de

The question "FPGA or not?" keeps me still awake at night, so some rambling here! > Is the BBB not fast enough to do Qbus? Meaning, for qbus, would a FPGA be necessary? > Or was this just the op's choice among many possible options? I was considering a FPGA solution first, even had a Xilinx ZYNQ training for that. But switched to BeagleBone PRU soon for several reasons (many non-technical ones). Speed is essential. OK, UniBus/QBus are asynchronuous, so you can delay bus cycles when your emulated devices need processing time. But the emulator has to watch bus activity in realtime for register accesses to emulated devices. Problem here is not ARM processing power (1+ GHz is fast enough), but delays in the GPIO access and random code delays by Linux task switching and RAM refreshes and the like. So you need to have some realtime logic on the bottom of all the C code. UniBone should be "community friendly", a FPGA would mean: - code developers need VHDL/Verilog skills and a special tool chain - kit builders need to program the FPGA and solder these damn fine pitch parts. - Technically, a interface between ARM core and FPGA is time-critical, would not work on RPi FPGA shields. So either you implement EVERYTHING in FPGA, or you are bound to some FPGA SoC demo boards. As the BeagleBone has these realtime PRUs: - all development is done in C/C++, familiar cross platform debugging in Eclipse. - the edit-compile-debug cycle is very fast: 10 seconds for a partial recompile & program start when developing remote from a modern PC. - The whole toolchain (gnu gcc and PRU C commpiler) also runs on the BBB itself, so you can develop new code immediately. - BBB is slim enough to fit in a DEC card slot, is cheap (down to $60 now) and will be available for years. - big Debian/BeagleBone community behind, Drawbacks of the ARM+PRU approach were: - the realtime stuff is done with sequential code, so manual optimization was needed. - the PRU code&RAM space is limited, design can not be scaled up endlessly. - limited pin count available, a GPIO multiplier was needed. UniBone is a success because indeed several contributors accepted it. Despite choosing BBB, I wasn't sure for long wether that ARM+PRU approach wouldn't be a dead end technology. There was not much development on the BeagleBones for 5 years, but with the new BBONE-AI, everything has changed. TI followed the "Linux ARM + coprocessors" road here in a spectacular way. The mandatory move to "multi core, GHz, RAM, WiFi, GBit Ethernet, USB3" has been done too. > It does seem useful to have this thing run linux and ethernet and be able to pass > files (data and programs) back and forth very easily. > the FPGA approach seems more technically challenging but seems less universal (to my limited mind). > It would seem a BBB you could load software, test, and reload as easily as > copying some executable code (I dont know if that is correct or an over simplification). > whereas the FPGA sounds like it needs to be recompiled/re-burned each time? All true, see above. > > I dont know whether an RPi could work or if the BBB is needed for speed etc. RPi's are faster and have more ARM cores than BBB, but thats in fact not needed. "Realtime determinism" is the keyword here, as well as GPIO speed. BBB PRUs can toggle GPIOs with 50+MHz. regards, Joerg

6 years, 4 months

1
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Some SCSI drives for sell at ShopGoodWill.com

by bob099＠centurytel.net

Watch out for shipping charges https://www.shopgoodwill.com/Item/80102424 https://www.shopgoodwill.com/Item/80112091

6 years, 4 months

1
0
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Quantum 2080 and 540 service manuals

by aek＠bitsavers.org

These showed up on eBay, I'd been looking for them for over twenty years http://bitsavers.org/pdf/quantum/Q500/81-50466A_Q500_Technical_Reference_Ma… http://bitsavers.org/pdf/qunatum/Q2000/81-49218A_Q2080_Technical_Reference_…

6 years, 4 months

4
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ge first transistors

by couryhouse＠aol.com

We would love tunnel diodes in packaging for our semiconductor? display ay smecc ed# On Friday, November 15, 2019 charlesmorris800--- via cctalk <charlesmorris800 at centurytel.net; cctalk at classiccmp.org> wrote: >I've got a bunch of tunnel diodes; never found a practical use for them for me. You must not own any older Tektronix scopes then. At one time I had fourteen and there were several tunnel diodes in almost every one (trigger circuits mostly). And their characteristics do drift with age, sometimes out of the range of adjustment :) -Charles

6 years, 4 months

1
0
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Question about modems

by brain＠jbrain.com

I am the author of tcpser, a UNIX/Windows program that emulates a Hayes modem. Some time ago, Chris Osborn (FozzTexx) forked a copy of my project to fix some bugs and he also added in some parity code, which looks to strip parity from the incoming serial connection (in the case that the serial port is set as 8N1 and the computer attached to it sends in 7E1 or similar. I am working to merge in all of his changes into the mainline codebase, but I am unclear on prpper Hayes behavior.? His Readme says: https://github.com/FozzTexx/tcpser/commit/5f0e28bb837463e597a1daf9b3c07e56a… "I also made the modem routines automatically detect parity and ignore it in AT commands and print out modem responses in matching parity. Parity is *not* stripped when sending data over the connection, which is how a real modem behaves. This may or may not be what you want. Some servers will expect an 8 bit connection and may not work." Did Hayes modem really do that?? I thought most later modems self detected parity and speed and thus would have switched both the comm on the serial port and the data sent to the other side in the same parity (if the terminal was 7E1, the modem would configure as 7E1 and send 7 bit data to the other side. But, maybe real modems did as Chris notes. Anyone have guidance on this?? The goal of tcpser is to emulate a Hayes modem as much as possible, but I never really thought about mismatched parity on the RS232 line and how to deal with it. Jim -- Jim Brain brain at jbrain.com www.jbrain.com

6 years, 4 months

17
53
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ge first transistors

by charlesmorris800＠centurytel.net

>I've got a bunch of tunnel diodes; never found a practical use for them for me. You must not own any older Tektronix scopes then. At one time I had fourteen and there were several tunnel diodes in almost every one (trigger circuits mostly). And their characteristics do drift with age, sometimes out of the range of adjustment :) -Charles

6 years, 4 months

1
0
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TI994/A Power Supply

by trash80＠internode.on.net

I may be stating the obvious here but looking for a little advice and reassurance from anyone on the list who may have had experience with these machines. I have a couple of TI99/4A's that I was given quite a long time ago along with about 50 software cartridges (if I understand things correctly the cartridges on their own a quite a bonus). What I am missing are power supplies. On my research the inputs are 12 and/or 5 volt depending on the number of power pins on the back (mine have 2). These voltages appear to neatly align with most PC power supplies so I should be able to tap into an old AT power supply of which I have quite a few. Thank you. Kevin Parker

6 years, 4 months

7
12
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Quantum 2080 and 540 service manuals

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > These showed up on eBay, I'd been looking for them for over twenty years As in, 'you all shouln't bid on those so I can grab them'? Or do you want someone here to get them, and send you scans? If the latter, people should co-coordinate so they aren't bidding against each other. Noel

6 years, 4 months

2
1
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Teletype BRPE 8-level punch blocks

by aek＠bitsavers.org

https://www.ebay.com/itm/174096548679 in case anyone saw these and wondered what they're for

6 years, 4 months

2
5
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Connecting LK250 to VAXmate

by robert.jarratt＠ntlworld.com

I recently acquired a VAXmate with an LK250 keyboard. The problem is the keyboard came without the cable. It uses an 8-pin SDL connector and the usual tiny MMJ-like connector at the keyboard end. I don't know the pinout and I don't have the necessary crimping tools, is there any source for such a cable? Thanks Rob

6 years, 4 months

3
5
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Xerox 820 PC

by jim＠photojim.ca

With permission, I?m forwarding this email about a Xerox 820-II that?s available in Regina, Saskatchewan, Canada. (I live in Regina, and know Steven.) Feel free to contact him directly. He?s also available by IRC; email me directly for server details. Jim From: Steven Brown [mailto:tuxsteve at gmail.com] Sent: Wednesday, November 13, 2019 10:01 PM To: buysell at losurs.org; Q&A LOSURS <q&a at losurs.org> Subject: [LOSURS: buysell] Xerox 820 PC My dad worked at Xerox for over 20 years here in Regina. A former co-worker of his called him to see if he knew anyone who might be interested in taking ownership of a Xerox 820 he has. Still works apparently. Specs can be found here: https://oldcomputers.net/xerox-820.html He sent along the following information: " This is a xerox 820 II antique, black & white screen, 8? HD and a dual 8? floppy unit, has the 8 and 16 bit intel processors. If one was interested in playing with the old stuff. Tried to give it to Western Development museum but they only want stuff that relates to Saskatchewan. Oh yes it is a com base operating system " He mentioned it comes with a pile of software as well. Picture sent isn't very good but here it is: https://imgur.com/a/CzH5FHz If anyone is interested please let me know. If anybody knows of a person or institution who may be interested, please let me know. Regards, Steven Brown

6 years, 5 months

3
3
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WANTED: iSBC-202 microcode image

by fulivi＠tiscali.it

Hi everyone, I'm planning to expand my MAME-based emulation of Intel MDS-II systems with the support for double-density floppy disks. In particular, I'm thinking of emulating the isbc202 floppy controller because its architecture looks very interesting. This board was based on Intel's own 3000-series bit-slices. A necessary step for this work is finding the image of the 4 microprogram PROMs on the controller board. Has anyone on this list ever dumped these memories, please? Can you share the binary images with me? Of course, I'm going to properly credit you in the emulator sources. AFAIK this would be the first emulation of a Intel 3000 system. A side question: do you happen to know if the Intel CROMIS assembler for 3000 series has ever been preserved somewhere on the Net? The manual says it was provided to user as a set of FORTRAN IV sources. Thanks in advance for your help. --F.Ulivi

6 years, 5 months

4
3
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ge first transistors

by couryhouse＠aol.com

g11? for ana log? and g11a? for? digital and pulse we have a G11A? new in box unused? with cellophane surround available? respond off list

6 years, 5 months

8
15
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Freebies (documentation) France and online

by sales＠elecplus.com

http://matthieu.benoit.free.fr/databooks.htm Looks like a fellow in France wants to give away/trade a lot of documentation. https://www.intel-vintage.info/ https://www.intel-vintage.info/intelotherresources.htm Note the Copyright says no copyright, take what you need freely. There is a LOT of interesting stuff on this site. http://www.ebyte.it/library/refs/SoftwareOnlineTexts.html http://gordonbell.azurewebsites.net/digital/decmuseum.htm more DEC stuff than I have ever seen together. Cindy Croxton

6 years, 5 months

1
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Xref

by sales＠elecplus.com

Does anyone have a copy of this, or something similar? Prefer digital format, if possible. Jameco Part number 159791 $29.95 61140 SEMICONDUCTOR CROSS REFERENCE on CD-ROM Enhanced Version A complete guide to semiconductor replacement and substitutions from the makers of PHOTOFACT(R) service documentation. More than 490,000 part numbers, type numbers, and other identifying numbers listed. Includes part numbers for the United States, Europe, and the Far East. Covers all major types of semiconductors: bipolar transistors, FETs, diodes, rectifiers, ICs, SCRs, LEDs, modules, and thermal devices. Replacement for NTE, ECG, Radio Shack, and TCE - four cross references in one! Up-to-date list of original equipment manufacturers. The most comprehensive replacement data available for engineers, technicians, and all those who work with semiconductors. Minimum System Requirements: Windows 95(R) or higher and 60 MB of free disk space C 1998 Howard W. Sams. All Rights Reserved. http://www.hwsams.com Thanks! Cindy Croxton

6 years, 5 months

2
2
0 0

AED WINC08

by jsw＠ieee.org

On 11/11/19 12:27 AM, Eric Moore via cctech wrote: > Hello, I have a working AED WINC08 drive, which is a winchester drive > emulated to look like an RL02, along with the qbus controller card. > > https://archive.org/details/bitsavers_aedbrochurJan82_2107642/page/n1 > > The winchester drive itself is a fujitsu M2302B. One of the disks (it shows > up as 2 10MB volumes in RT-11) is having write issues. How can I find a > replacement disk drive in working order? The 2302b has a shugart compatible > interface, so should any shugart compatible 8" winchester drive work in the > aed winc08 rl02 emulator? > > What other options do I have to attach a winchester drive to an 11/03 for > use in rt-11? I have an RL02 I have never hooked up, do the disk packs hold > up well over time? How hard is it to clean and align an 8" winchester drive > to try and address the write issue? > > Thank you, > > -Eric In my (pre) historic use of products similar to this one, it was rare to swap the vendors drive with a completely different drive. The controllers, their electrical interfaces and recording formats were tightly coupled to the disk drives implemented. My suggestion would be to look for a QBus SCSI Controller like the Emulex UC07 or Dilog SQ739, though both are a bit pricey. These open up a large number of drives to use and later versions of RT11 support the MSCP protocol the controllers emulate. The use of the SCSI2SD drive emulator gives even more flexibility through the use of microSD cards. Google around for both. I have an pair of RL02 drives. I keep them clean and power them up for short periods regularly. You need to be alert to potential issues with electrolytic capacitors drying out and causing problems in the power supplies and circuit boards of all devices of from this era. See http://www.vcfed.org/forum/showthread.php?72247-Dismantle-an-RL02-pack for a recent discussion and pictures of some of the material in the packs decaying over time. Jerry

6 years, 5 months

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Looking for documentation for VAX-11/730 ENKCC Diagnostic

by derschjo＠gmail.com

Hi all -- The VAX-11/730 we have running here at the museum has developed a fault that occurs only sporadically, usually days apart. Running the complete diagnostic suite for the better part of a week reveals this: SECT TST ERR EXP REC OTHER MSK MODULE ENKCC 33 08 000000FF 000000DF N/A FFFFFF00 M8391 M8728 Re-running only ENKCC, this error is repeatable (though it still takes a couple of days for it to occur). It helpfully points out the MCT (M8391) and memory boards (M8728) as possible causes; we have spare M8728s and I've swapped them around with no change in behavior. I have a spare M8391 in my own collection but it fails in a completely different way so that's not much help. I cannot find any real documentation for ENKCC so I don't know what TEST 33 is doing, nor what ERROR 8 indicates in this context, though it seems we're dropping a bit somewhere :). Anyone out there sitting on a pile of 11/730 documentation? Thanks as always! - Josh

6 years, 5 months

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Printers in Manchester UK

by dave.g4ugm＠gmail.com

Folks, Any one got any interest in any dot-matrix printers. Got a Panasonic wide carriage, DEC narrow carriage, and a Tandy DMP200.. Dave Wade G4UGM & EA7KAE

6 years, 5 months

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IBM Rigid Cleaning Tool 2200574

by Charles.West＠daystar.com

Chas and chon here at Daystar Television do you have or can you refer us finding

6 years, 5 months

1
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Remex reader/punch PDP-11 interface board manuals on eBay

by steven＠malikoff.com

Just wondering if anyone on the list is going after these 1973 Remex manuals for the PDP-11 interface to their reader/punch units? https://www.ebay.com/itm/274092453978 https://www.ebay.com/itm/274092431915 I have two of the reader-only version of this board I bought relatively cheap off eBay some years ago and would be happy to trade or pay for a scanned copy if required. As I don't have a Remex reader/punch it would save me bidding up the price unnecessarily. Steve.

6 years, 5 months

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New website has gone live

by cube1＠charter.net

After months of procrastination and work, my new website has gone live at: https://www.computercollection.net/ It is a nearly complete makeover. The home page also has a link to what my site used to look like. (Context: The website used to be at webpages.charter.net/thecomptuercollection . However Charter/Spectrum dropped support of subscriber home pages, so I had to move it to a hosting service, which I did last year - pretty much intact as it had been. That then opened up the opportunity for the website to have a lot more images and capabilities - the new website is the result. JRJ

6 years, 5 months

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Anyone have docs/jumper settings for Tecmar "PC 500K/1MEG FLOPPY CONTROLLER" ISA card ?

by rescue＠hawkmountain.net

I have one of these, it has 2 jumper blocks, JPR2 (4 3 pin jumper 'settings'... looks to probably latch each of the 4 high or low) and JPR3 (12 on/off jumper positions). It also has a JPR1 which would be a 3 pin header and it is strapped by wire to position 1-2. Would love to figure out how the IO port and IRQs are configured. Card has no BIOS, so unlike a WD1002A-FOX there won't likely be any jumpers to set drive type. (I'm not having much luck with that card in a Tandy 2500 SX... but that's a completely different issue). Hopefully someone has or knows where there are some docs on the jumper settings. I'd imagine I could figure out some by probing which ISA pins various jumpers connect to..... but any jumper settings that control chips for decoding logic will be far more difficult to determine. Thanks, -- Curt

6 years, 5 months

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swtpc.com expired???

by wh.sudbrink＠verizon.net

Domain has been down for 7 days now. No reply to emails. Does anyone know anything? -----Original Message----- From: William Sudbrink [mailto:wh.sudbrink at verizon.net] Sent: Monday, November 04, 2019 12:29 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: swtpc.com expired??? Anybody know if Mike Holley is OK? Bill S. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

6 years, 5 months

10
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SUN Diagnostic Executive

by cc＠informatik.uni-stuttgart.de

I'm encountering some strange and severe failures on our 4/260 and therefore I'm looking for a dump/tape image of the Sun-4 Diagnostic Executive. The manuals are online but not the tape, so I hope someone has made a dump. Thanks, Christian

6 years, 5 months

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Classic equipment available & my bad year.

by dave.dunfield＠gmail.com

Hello Everyone. I have had a major health incident which means that I have been unresponsive for several months. As I need to move in closer to town, I will be disposing of what remains of my collection (Things like: Altairs, Imsa, PET 2001, Apple II, TRS-80s, lots of S100 carts etc.) I have posted some preliminary information at: http://www.classiccmp.org/dunfield/sale.txt This will be updated on a regular basis. If you are interested in what happened to me, I have posted some details at: http://www.classiccmp.org/dunfield/2019.txt Dave Dunfield

6 years, 5 months

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[Cadetwriter] Announcements

by dave＠babcock-family.org

To all, The Computer History Museum's IBM 1620 Jr. project team has several announcements about Cadetwriter: 1)? Congratulations to Paul Williamson as the first person, besides our project team, to successfully build his own Cadetwriter.? We know that a number of people are building or planning to build one, but Paul is the first person we've heard from that has completed it. ??? If you are building, or planning to build, a Cadetwriter, please let us know about it. ??? Paul's WheelWriter 1000 seems to have a different version of the logic board and/or its firmware than the CHM WheelWriters. This exposed several issues that Paul diagnosed which led to changes in the Cadetwriter firmware that make it more robust. 2)? A new version (5R5) of the firmware is available with these important changes: ??? -? Added support for semi-automatic paper loading. ??? -? Increased the Interrupt Service Routine delay time to deal with overlapping column scans. ??? -? Adjusted the timing of unshifted, shifted, and code characters. ??? This firmware is available at: https://github.com/IBM-1620/Cadetwriter 3)? There is a new Cadetwriter message board at: https://cadetwriter.slack.com ??? There are actually 5 channels available: ??? -? Cadetwriter/announcements - for announcements of new versions of the firmware, documentation, hardware, etc. ??? -? Cadetwriter/description - for a general description of Cadetwriter and links to resources. ??? -? Cadetwriter/building - a discussion forum for those building a Cadetwriter. ??? -? Cadetwriter/operating - a discussion forum for those using a Cadetwriter. ??? -? Cadetwriter/suggestions - a discussion forum for proposed additions/changes to Cadetwriter. ??? If you have interest in Cadetwriter, please register and participate in the discussion. Thanks, IBM 1620 Jr. Team

6 years, 5 months

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SOT - Grab first and ask questions later

by trash80＠internode.on.net

I suspect a number of members are like me - when there's salvage or rescue stuff on the radar you grab first and ask question later otherwise tomorrow it might not be there. I quite like those picker shows and subscribe to their philosophy "buy (or grab) it when you see it". I'm still ruing the day I let a TRS-80 Model II with a full set of floppy drives go by procrastinating as I haven't seen one since. Anyway a little while ago someone I know was quitting their business and gave me all their office salvage - laptops, PC's, printers, KVMs, routers, monitors etc etc. As before I did not ask any questions and did not look the gift horse in the mouth. The other day I needed a CD drive for a little project and went through the stuff , found something promising and opened it up. Anyway they'd been doing all their "business" in there (number ones and twos amongst many other things I suspect) and the machine was a write off. I suspect finds by other list members have been even more "interesting" http://koken.advancedimaging.com.au/index.php?/albums/interesting-finds/ Kevin Parker

6 years, 5 months

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ISO: Monochrome monitor suitable for use with VAXStation 2000

by derschjo＠gmail.com

I'm looking for a VR260, VR262, VR150, or similar. Working or not, as long as it's complete and not falling apart. Thanks in advance! Josh

6 years, 5 months

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SpaceWar without needing an EAE for PDP8 /E /F /M /A

by roelof_klaas＠yahoo.com

Hello everyone, I've been playing with SpaceWar for my PDP8 Omnibus machines. Since I don'thave the EAE option I've made the LAB8 / AX08 version work on the VC8E. So now you can run Evan Suits SpaceWar version on an Omnibus machine and you don't need an EAE.? https://github.com/Roland-Huisman/SpaceWar And for those who might not have the VC8E graphics boards I've designed74xx clone boards. These are my VC8E (M869 / M855) clone boards: https://raw.githubusercontent.com/Roland-Huisman/Digital_VC8E_M885R_Digital… And this is the DK8E RTC clone (M882) which I'm using. https://raw.githubusercontent.com/Roland-Huisman/Digital_DK8E_M882R_Mains_R… There are a few more board clones on my GitHub like the RX8E (M8357) for the RX01/RX02 or TA8E (M8331) for the TU60 if anyone would be interested. With the gerber files andpart lists you should be able to make your own boards. They are all 74xx clones sono hard to find DEC chips on it... I'm not very active on cctech and I guess some people on cctech are maybe not active on vcfed.So I thought it is nice to mention it here too... Regards, Roland

6 years, 5 months

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Classic equipment available & my bad year.

by marvin＠west.net

Dave, sorry to hear about your situation. Regarding system/parts/etc. selling prices, I use something called TeraPeak. It is available on a subscription basis with the downside that it is now part of Ebay... I quit them in 2015 with no current plans of ever having anything to do with them, but is still the best way I've found to get pricing on what sells and how much. It normally has the actual selling price as opposed to the "asking" price on the main listing. Because the prices on TeraPeak are the actual selling prices inflated by the eBay fees and "free" shipping, I generally reduce them by around 20% - 30% to get realistic pricing (rare items excepted.) Another what appears to be similar service is Worthpoint. Although I've looked at it, I have never actually used it. Like you, I had plans of starting a museum and thus have stuff that I haven't been able to find pricing information using either TeraPeak or Google. That would include rare terminals (i.e. Hazeltone, ), some computers (Philips word processors, Wang, etc.), documentation (IBM, Burroughs, a variety of printers, etc.) and a lot of other "stuff" (including some of the stuff you have listed.) How many people have heard of DMA Systems? Since I live in Santa Barbara where a number of computer, software, peripheral were made, I decided to keep anything made in the Santa Barbara and still have plans for a museum dedicated to what was made here. That is something you might find possible in your area. Another thing I'm "collecting" is anecdotes about computer collecting in the Santa Barbara area. Two examples are where how the name Pickles and Trout came about, and Lobo drives being named after Roger Billings (formerly Production manager at Polymorphic) pet wolf, etc. You might also consider writing a book documenting some of the knowledge you acquired about computers, etc. In any case, it sounds like you are well on your way to recovery. So my best to you and your family during this recovery period! Marvin > Thanks to everyone for the kind words on my situation. > > Had lots of correspondence from various people interested in > certain systems, but no offers, and very little information on > what people think they are worth. Many of these systems are > very old, very rare and nearly impossible to acquire. As I am no > longer working I want to maximize what I receive from them. > I will be researching this over the next year and will add prices > if/when I work them out. If price is unknown I will take the highest > reasonable offer, so I cannot offer systems now without an idea > of what they are worth to you.

6 years, 5 months

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191109 Classic equipment available & my bad year.

by dave.dunfield＠gmail.com

191109: Added PDP-11s, KIM1, EDB9301, MMT-85 & FloppyDrives Thanks to everyone for the kind words on my situation. Had lots of correspondence from various people interested in certain systems, but no offers, and very little information on what people think they are worth. Many of these systems are very old, very rare and nearly impossible to acquire. As I am no longer working I want to maximize what I receive from them. I will be researching this over the next year and will add prices if/when I work them out. If price is unknown I will take the highest reasonable offer, so I cannot offer systems now without an idea of what they are worth to you. Had several messages asking about other systems I show on "Daves Old Computers". I have been dealing with several collectors in Toronto and Ottawa, and any systems not listed in sale.txt is already gone (still taking inventory so may add a few more, as well as a LOT of other technical stuff. > --- Original Message --- >I have had a major health incident which means that I have been unresponsive >for several months. As I need to move in closer to town, I will be disposing >of what remains of my collection (Things like: Altairs, Imsa, PET 2001, >Apple II, TRS-80s, lots of S100 carts etc.) > >I have posted some preliminary information at: > > http://www.classiccmp.org/dunfield/sale.txt Dave

6 years, 5 months

1
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Classic equipment available & my bad year.

by harper＠secureoutcomes-hq.com

><snip> >I have had a major health incident which means that I have been unresponsive >for several months. As I need to move in closer to town, I will be disposing >of what remains of my collection (Things like: Altairs, Imsa, PET 2001, >Apple II, TRS-80s, lots of S100 carts etc.) Best Wishes Dave. Jack ---------------------------------------------------------------------------------- Jack Harper, President Secure Outcomes Inc 2942 Evergreen Parkway, Suite 300 Evergreen, Colorado 80439 USA 303.670.8375 303.670.3750 (fax) http://www.secureoutcomes.net for Product Info.

6 years, 5 months

2
1
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