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

by jpl15＠panix.com

On the back of the VS 3100 is a DEC SCSI connector that I would like to be able to adapt to a 'normal' SCSI I cable (Amphenol Blue Ribbon connector). The 2nd choice would be to connect to once of the spare cables inside the box... Anyone have any info on an available adapter for this? Googling didn't help much... Long shot: was there ever a Pertec formatter made for the VAXstations? Or SMD interface? Just curious... Cheers John

22 years, 7 months

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HP COS Manual on eBay

by jpl15＠panix.com

HP 85001A Cassette Operating System manual http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2588251229&category=25409 Cheers John

22 years, 7 months

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PAGING Dan Cohoe

by waltje＠pdp11.nl

Dan, Your email is not working. Got your voicemail msg, sent a copy of the original message to your alternate address. I'm in LA now, but still reachable by phone. (and, thanks to Starbucks, also by email again ;-) Fred -- Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist Visit the VAXlab Project at http://VAXlab.pdp11.nl/ Visit the Archives at http://www.pdp11.nl/ Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Mountain View, CA, USA

22 years, 7 months

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pdp problems

by dan_williams＠ntlworld.com

I am having problems with the pdp 11/04 I picked up last week. If I power on with the machine without the extra cards, I get output on the la36 with a $ prompt. So far so good. But with the card cage connected the run light is permenantly on (ie. with halt switched), with no output.on anything (There are two rs232, la36 and a display unit) So the main questions are : what could cause this ?. The main cpu box has a 7856 which the la36 is connected to, also a 7800 which has an rs232 cable connected to it, how do I get the console output to this so I can use vtserver on it ? The controller card for the rx01 is in the extra card box, In the short term can this be moved to the main box ? It has a dead rk11-d and an untested rk11-c with no power supply unit and no case. What sort of power supply runs this, I also picked up about 5 different power supplies with this, so one of these might do the trick. Thanks for any help Dan

22 years, 7 months

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LEDs Was: Re: Emulation (Was: Emulators of Classic

by india_50＠yahoo.com

well, of course, they wouldn't be cheap to produce on a wafer like other chips. Also, i don't think it is feasible as such will not be able to handle all the power that would be o/p(heat i mean), which would be in Watts!!(too high for ICs) therefore i don't think it is possible to get led's for the 75dpi screen ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html

22 years, 7 months

2
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LEDs Was: Re: Emulation (Was: Emulators of Classic Computers))

by brad＠heeltoe.com

der Mouse wrote: ... >What I really want to build, y'see, is a cellular automaton machine. >Ideally, it would be little modules that abut one another and >communicate neighbour cell state between modules somehow. Then add a >little logic behind each LED, and clock them in parallel. ah, a CM-1 :-) I liked the cm-1 but I would allow them all to have independent program counters... :-) -brad

22 years, 7 months

2
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TI99/4a and expansion chassis

by ghldbrd＠ccp.com

Just found the expansion chassis at a hamfest for $1, and wondering if there is any documentation online for it. I'd like to try to see if I can save some programs, etc. It has the bus interface card, floppy controller, RS232 adapter, and the 32k memory module too. Any of you TI fans out there please contact me off-list. Gary Hildebrand St. Joseph, MO

22 years, 7 months

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PDP-11 disassembler

by bqt＠update.uu.se

On Sat, 17 Jan 2004 "Jay West" <jwest(a)classiccmp.org> wrote: > Someone contacted me about having a PDP-11 disassembler, with source code, > under the GPL license. Would folks here be interested in that? Not to disencourage you, but there are already several in the DECUS library. Mostly written in MACRO-11 admittedly... I usually use DOB on Magica. Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

22 years, 7 months

1
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LH0080

by lyosnorezel＠yahoo.com

Message: 16 Date: Sat, 17 Jan 2004 11:12:27 +0100 (CET) From: Christian Corti <Christian.Corti(a)studserv.uni-stuttgart.de> Subject: Re: LH0080 On Thu, 15 Jan 2004, Lyos Norezel wrote: ?!?!? Pinout, specification etc. are identical to those of a Zilog Z80. It's just a second source part. Thanks for writing Christian... Completely identical in EVERY way to the zilog Z80? Kool... that make my work much easier. Thanks. Lyos Norezel --------------------------------- Do you Yahoo!? Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes

22 years, 7 months

1
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Programming 1702 EPROMs, ProLog Programmer question

by rigdonj＠cfl.rr.com

I've been playing with my old Pro-Log M900 programmer this morning and I've figured out how to duplicate 1702 EPROMs. But I haven't figured out how to use the memory buffer in the programmer. I THINK I've figured out how to read the buffer contents and change them but something is wrong. When I change the contents and then try to list them, they're reset to all FFs. Either I'm not changing them or I'm not reading them or when I switch >from edit to list they're being reset. I also haven't figured out how to dump an EPROM to the buffer or program one from the buffer. Anybody know how to use the M 900? I have a manual for the M 980 but it doesn't help. The main confusion seems to be figuring out exactly what the Memory Buffer vs Normal switch does. Joe

22 years, 7 months

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MicroVAX I update part II the sequel

by witchy＠binarydinosaurs.co.uk

Evenin' folks, OK, I've just finished (for now) trying to get a full POST out of the VAX. It needed a dummy load to powerup with no cards or devices present so I used an old suspect RD54. Voltages fine and stable so in with the CPU cards and..... it passes the CPU tests and stops at 3 on the LED. The VT220 shows '00000000 03' which I took to mean it hadn't found any memory. RUN light stays off. 'Fine,' I think, and put the 1mb memory board in. Still stops at 3, and sometimes the 'ready' button and 'drive 1 write protect' LED flash alternately. It hasn't got to accessing the RQDX2 yet, I'm making the assumption that tests 2,1 and 0 are the same as they are for most other microvaxen. Has anyone got a copy of the MV I owners guide or know if it lives on an FTP server somewhere? The backplate has the list of tests on and according to it '3' is marked as '640K??' but it stops there no matter which mem board I've got installed, and I don't believe they're both toast. I'm reluctant to borrow a 4mb board out of one of my other machines in case it gets nuked. Could be a suspect backplane I suppose. Any clues? Cheers :) -- Adrian/Witchy www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(

22 years, 7 months

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MicroVAX I update part II the sequel

by TRASH3＠splab.cas.neu.edu

The leds and patch panel display show 7 through 1, with zero being control passing to secondary bootstrap. DAP leds Led display on, on, on 7 microverify failed before completing the data path microsequencer test on, on, of 6 error found on DAP module on, of, on 5 Error found on MCT module on, off, off 4 undetermined error in DAP/MCT interface off, on, on 3 microverify worked as expected if bootstrapping was attempted, bad memory was found off, on, off 2 no boot device was found off, off, on 1 unable to boot from selected device off, off, off xxx control passed to secondary bootst. This from the januaryu 1984 microvax I cpu technical description. Joe Heck

22 years, 7 months

2
1
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Emulators of Classic Computers

by india_50＠yahoo.com

hey, u know what, building a single board computer with an 8088 isn't all that difficult and a lot of circuits are already available. one can also design a custom based computer as per the requirements. infact, the only problem would be in loading the monitor program, which can either be copied from retail versions, or can written afresh(tested ofcourse), and then used. ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html

22 years, 7 months

1
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IBM PS/2 Model 25

by danjr＠voyager.net

I have put this out on the list before, with limited response. I am looking for a good (preferrably working) IBM PS/2 Model 25. I would also prefer one with a hard drive of some kind. Thanks Dan

22 years, 7 months

1
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Webster SRQD11-B and DEC RD-54

by cmcnabb＠4mcnabb.net

I've been trying to get an RD-54 to work with an SRQD11-B Controller. I finally figured out the the SRQD11-B wants the drive to be select to either 1 or 2, instead of 3. I now have another, more troublesome, problem. The drive acts like it is selected to both 1 and 2 at the SAME TIME!. An access to either will illuminate the drives activity light. Everything hangs after that. The controller works fine with a Quantum Q540 drive. So, is there some kind of Jumper or something on the RD-54 that would cause this kind of behavior? I will probably bring the drive home this weekend and try it on an RQDX-3 just to see if I get the same problems. Of course, I'll change the drive select to 3 first.

22 years, 7 months

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Pickles & Trout IEEE 488 manual needed

by jack.rubin＠ameritech.net

Anybody have a copy of the manual for the P&T 488 S100 card? I'd like to buy/borrow/download one - and I'll be happy to scan and post if others are interested. Jack

22 years, 7 months

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FW: Old IDE hard drives

by CCTalk＠catcorner.org

I've been having server troubles and never saw this come accross. Anyway, I think it's a good idea for getting rid of old PC junk, rather than just tossing them in the landfill. > From: Joe Stevenson > To: Classic Computers Mailing List > Sent: 1/13/2004 7:41 AM > Subject: Old IDE hard drives > Is there any interest in older IDE hard drives, 170-540MB? > I listed them on eBay, but got no response. I probably should have > posted them to the list, but I wasn't sure that was allowed, so I > didn't. Well, if no one else makes a claim, the older smaller capacity drives are usually in demand for amateur radio clubs. I have a reserve here for my local club (in northern NJ). As an incentive, most of these clubs in the US are 501(c)3 corporations. You would be able to take these as a tax deduction. Find comparables on a refurb site, save the comparable resale value from when you donate as documentation of a resonable price, and count them as donations at the end of the year. Much of this also applies to older 486 computers. A lot of the software still used on the packet backbone (where it still exists) will not run on newer machines. Of course, I am not an accountant (IANAA?), so please verify all of this, especially the comparables bit. Kelly

22 years, 7 months

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LH0080

by lyosnorezel＠yahoo.com

Could someone please give me some info on the LH0080? From what I've heard it is Sharp's Z80 CPU clone... but I need datasheets... pinouts... etc. Any help would be much appreiciated. Thanks. Lyos Gemini Norezel --------------------------------- Do you Yahoo!? Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes

22 years, 7 months

2
1
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PDP-11 disassembler

by pete＠dunnington.u-net.com

On Jan 16, 20:26, Jay West wrote: > Someone contacted me about having a PDP-11 disassembler, with source code, > under the GPL license. Would folks here be interested in that? Yes, 'cuz the one I wrote years ago in BASIC, before I understood how to do such things, is slow and crap :-) -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

1
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Emulation (Was: Emulators of Classic Computers)

by pete＠dunnington.u-net.com

On Jan 15, 17:49, Gordon JC Pearce wrote: > On Thu, 2004-01-15 at 16:53, Brad Parker wrote: > > > > Gordon JC Pearce wrote: > > > > > >There are PDP-8 emulators out there already, better ones than this too. > > >But I wanted one that was *mine*! (Shh, little secret, keep it under > > >your hat but it's an experiment, maybe a precursor to building an 8 in > > >TTL). > > > > I'm probably high, but I'm still dreamy from the work the XKL guys did :-) > > > > If you want to do it in an FPGA (well, CPLD), let me know - I'll help! > > I really want to do it in discrete logic. Call me crazy, enough people > do as it is... Sounds good to me... > Actually, I'd probably do it in 40xx CMOS, simply because I don't want > to have a +5V supply the size of a MIG welder lying around. :-) > What indeed... Now, Maplin do some nice 13mm LEDs, how big do you think > we could make a panel? How about the 3" LED clusters they use as tail > lights on buses round here? Make a PDP-8 6' across, like the giant > MS-20 that Korg made for demo tours in the 1970s? But then you'll need the MIG welder again :-) -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

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pdp11 disassembler, with source, GPL license

by jwest＠classiccmp.org

http://www.classiccmp.org/PDP-11/MISC/

22 years, 7 months

1
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780 troubleshooting doc

by aek＠spies.com

thought you might find this interesting if you haven't seen it: www.bitsavers.org/pdf/dec/vax/EY-2217E-SG-0001_780tshoot.pdf

22 years, 7 months

1
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PDP-11 disassembler

by jwest＠classiccmp.org

Someone contacted me about having a PDP-11 disassembler, with source code, under the GPL license. Would folks here be interested in that? Jay West

22 years, 7 months

3
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Picture of my machine

by dwight.elvey＠amd.com

Hi For those that get IEEE's Computer magazine, there is a nice picture of my SIM-4 on page 17 of the January '04 issue. If you should ever see one of these laying around, make sure you get your hands on it. I only know of one other complete unit like this one and a couple of the lone SIM-4 boards. I'd be interested in know if anyone else on the list has one of these. I've written software to talk to the system as well as I have written an assembler, disassembler and simulator for this 4004 system. Dwight

22 years, 7 months

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Picture of my machine

by dwight.elvey＠amd.com

Hi Joe Blinkenlights has a slightly less clear picture at: http://www.blinkenlights.com/pc.shtml Its about half way down. I'd think that IEEE may have a site but I've not looked. Dwight >From: "Joe R." <rigdonj(a)cfl.rr.com> > >At 10:36 AM 1/16/04 -0800, you wrote: >>Hi >> For those that get IEEE's Computer magazine, there >>is a nice picture of my SIM-4 on page 17 of the >>January '04 issue. > > Do you have a link where us non-subscribers can see it? > > Joe > >> If you should ever see one of these laying around, >>make sure you get your hands on it. I only know of >>one other complete unit like this one and a couple >>of the lone SIM-4 boards. >> I'd be interested in know if anyone else on the list >>has one of these. I've written software to talk to >>the system as well as I have written an assembler, >>disassembler and simulator for this 4004 system. >>Dwight >> >> >> >

22 years, 7 months

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why?

by aek＠spies.com

> Why should I spend $333 for one 9-track tape? The bidder has more money than brains? I hope he has some dedicated system that requires this stripped-down version of RSX-11M 'cause it ain't "collectable"

22 years, 7 months

2
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Old stuff and schematics in Kansas City

by mmcfadden＠cmh.edu

My old image processing lab at the university is being renovated and all of the equipment has to go. I have come across a schematic for a Kennedy 9400 tape formatter and some other devices. We used to write our own interfaces to a homegrown computer system. I may have some Fujitsu Eagle manuals. There are also many electronics catalogs from the the late 1980's, the electronics shop has to go. I'm hauling all I can get. I don't want the manuals and catalogs, but I'm not throwing them away. 2 Quadra 950's with array processors from 1993 with dual 24" image systems monitors. Graphon 225 terminal Sun IPC HDS X-terminals I'm tracking an alphaserver 2100 I'll make up a list, most of the stuff can be had for shipping costs. I want the alphaserver and manuals. Mike McFadden

22 years, 7 months

3
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Old stuff and schematics in Kansas City

by teoz＠neo.rr.com

----- Original Message ----- From: <McFadden>; "Mike" <mmcfadden(a)cmh.edu> To: <cctalk(a)classiccmcp.org> Sent: Friday, January 16, 2004 4:12 PM Subject: Old stuff and schematics in Kansas City > My old image processing lab at the university is being renovated and all of the equipment has to go. I have come across a schematic for a Kennedy 9400 tape formatter and some other devices. We used to write our own interfaces to a homegrown computer system. I may have some Fujitsu Eagle manuals. There are also many electronics catalogs from the the late 1980's, the electronics shop has to go. I'm hauling all I can get. I don't want the manuals and catalogs, but I'm not throwing them away. > > 2 Quadra 950's with array processors from 1993 with dual 24" image systems monitors. > > Graphon 225 terminal > Sun IPC > HDS X-terminals > I'm tracking an alphaserver 2100 > > > I'll make up a list, most of the stuff can be had for shipping costs. I want the alphaserver and manuals. > > Mike McFadden > What array processors are on the Quadras? Would be interested in those and anything else Q950 related

22 years, 7 months

1
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Odd PDP-11 tape related question

by bqt＠update.uu.se

On Wed, 14 Jan 2004 "Fred N. van Kempen" <waltje(a)pdp11.nl> wrote: > On Tue, 13 Jan 2004, Zane H. Healy wrote: > > > Interesting.... BTW, the DDS1 drive I'm using is a DEC TLZ06. Any idea if > Hmm, wasnt the TLZ06 a DDS2 drive? At any rate, yeah, this drive > might very well have this "problem" .. I had it with many DDS > drives, might even have been a TLZ in that stack... I *do* know > I tested it with a TLZ04. > > > this might also be a problem with an Exabyte 8500 tape drive? It would be > Cant remember... only had a 8200 at the time, and cant remember the > results of that.. I just decided to test a TLZ06 on my system, and it don't want to work. I normally play with an Exabyte 8200, and that works just fine. (This on a 11/84 with a CMD controller) So it might be as some suggested, that the DDS drives aren't too happy. I tried with a DDS2 tape in it, if that matters. The system sees the drive, and I can mount and dismount tapes, and even eject them. Reading or writing gives errors, though. I have not verified the drive on any other system either, so there are several possible problems here, but I thought I'd report what I can anyhow. Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

22 years, 7 months

11
17
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oddball televideo problem

by pete＠dunnington.u-net.com

On Jan 15, 23:08, Tony Duell wrote: > I beleive you are correct. One state is a -ve voltage between -3V and > -25V, the other is a +ve voltage between +3V and +25V. Anything between > -3V and +3V is undefined. My data sheets agree with that. > [Actually, I'll admit to having fed the output of an HCT04 (or similar) > into a serial port once. My excuse it that it waas a one-off test board, > and I had the schematics of the serial card it was driving (which showed > a 1489 reciever). I once used a dual opamp in an 8-pin DIL to do that. One half was the receiver, one the driver. I knew that what I was driving wouldn't overload the opamp's output, and it kept the chip count down (it was a small microcomputer based on a Z8, on a board about 3" square). > No way would I do this in a device to be used by others!) Ditto! -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

2
1
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DEC MINC-11 question

by Steven_R_Hutchins＠Raytheon.com

Classic comp lister's, I have MINC-11 ( seems to be a MINC-23 in a MINC-11 box) with the following: It only has these cards inside: M8186 CPU M7506 MEM M8029 RX02 DISK CONT M7954 IEEE CONT M8043 4510 MUX Card M8012 Boot Card This was a working unit until recently when I consistantly get "checksum error KVR 00" on bootup. I suspect the M8012 card...perhaps Eprom bad? I have no Docs. I have been to http://www.binarydinosaurs.co.uk/Museum/Digital/minc/minc.php and talked with Adrian Graham and he sent me to this list. any help appreciated greatly. S.R. "Hutch" Hutchins Engineering Department Raytheon Technical Services Company, LLC Norfolk, VA 23513 757-852-2134 FAX 757-852-2109 RayCommNet 7-493-2134

22 years, 7 months

2
1
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RA81 spin-up probs

by julesrichardsonuk＠yahoo.co.uk

Just been playing with some real DEC hardware today and trying to coax some life out of a pair of RA81 drives. Both drives are exhibiting the same fault - as soon as the RUN button is hit they seem to try and spin up for a second or two before the spindle motor disengages and the red FAULT light comes on. I'm not back at the site where these are until next weekend now, but is this a common fault that might mean there are a few obvious things I should check first? One drive was supposedly working when decomissioned at the site where it ran; the other one was definitely running on the site I was at today the last time it was powered up a short while ago. Curious that both of them are showing the same fault. I only had the RA81 user manual with me today - should be able to get hold of the service manual for next weekend. However, I hooked a terminal up to the diagnostic port on both drives. Issuing a "RUN DIAG" command with the HDA offline shows all tests passed. Pressing the RUN button as described in the manual gives the "Front panel function in progress" message as expected, the drive tries to spin up and stops, the fault light comes on, and I get dumped back to the RA81> prompt on the terminal - it doesn't even try to run any of the diags that the manual suggests it should do at this point. Looks like something's overloading when the drive tries to spin up and immediately shutting things down. The HDA is free to turn, belt tension seems good, and the motor manages a few revolutions before it stops. Unforunately I can't for the life of me remember what other lights came on at the front of the drive along with the FAULT light :-( cheers Jules

22 years, 7 months

4
8
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Microvax III Hardware

by jeff.kaneko＠juno.com

Pat: It's been spoken for. Thank you for your interest. Jeff On Fri, 16 Jan 2004 14:38:01 -0500 Patrick Finnegan <pat(a)computer-refuge.org> writes: > Hey, did you get the email I sent you Wednesday about this stuff? > And > did I "win"? I need to know so I can deside whether or not to bid > on > stuff that closes on ebay tonight... > > Thanks, > > Pat > > On Wednesday 14 January 2004 23:34, jeff.kaneko(a)juno.com wrote: > > The following items are available for shipping plus 15%. > > > > With thanks to Megan's field guide: > > > > 2 M7620 KA650-BA Q MicroVAX III CPU (workstation > > license), 90nS. > > > > 1 M7651-PA DRV1W-S Q General-Purpose DMA Interface > > (for BA200 series) > > > > 1 M7164 KDA50-Q Q Qbus SDI disk adapter, Q22 (1 of > 2) > > (QDA SDI) > > > > 1 M7165 KDA50-Q Q Qbus SDI disk adapter, Q22 (2 of > 2) > > (QDA SDI) > > > > 2 M7168 VCB02, QDSS Q 4-plane colour bitmap module > > > > 1 M7169 VCB02, QDSS Q 4-plane video controller module > > > > 4 M7621-AV MS650-AA Q 8-Mbyte RAM for KA650 (MicroVAX > III) > > > > 1 M7622-BP MS650-BA Q 16-Mbyte RAM for KA650 (MicroVAX > III) > > > > 1 M7769 KFQSA-S Q Storage Adapter (DSSI Disk > Interface), > > BA200 series > > > > 1 M8634-PA IEQ11-S Q Communications Controller > (IEC/IEEE) > > (for BA200 series) > > > > 1 M3127-PA DESQA-SA/SF Q Ethernet/thinwire adapter > > (DELQA+DESTA) with S-box handle > > > > 1 M8087-PA Q Scanner/printer to Q-bus DMA > interface > > > > Some cables are available, ask. If I don't get any takers, the > whole > > lot goes > > into the melter. I just don't have the place to keep them > anymore. . > > . . > > > > > > Jeff > > > > ________________________________________________________________ > > The best thing to hit the internet in years - Juno SpeedBand! > > Surf the web up to FIVE TIMES FASTER! > > Only $14.95/ month - visit www.juno.com to sign up today! > > -- > Purdue University ITAP/RCS > Information Technology at Purdue > Research Computing and Storage > http://www.itap.purdue.edu/rcs/ > > ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today!

22 years, 7 months

1
0
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Citizen 120D+ - service manual?

by philpem＠dsl.pipex.com

Hi, Does anyone have a service manual for the Citizen 120D+ dot-matrix printer? I'm trying to repair mine - the interface cartridge connector is totally shot and I can't ID it. It looks like a DIN41612, but it's two-row (both rows populated) with 30 pins. The printer's connector bears the text "030P2B-L14N 92-4-03". Thanks. -- Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, philpem(a)dsl.pipex.com | ViewFinder, 10BaseT Ethernet, 2-slice, http://www.philpem.dsl.pipex.com/ | 48xCD, ARCINv6c IDE, SCSI

22 years, 7 months

1
0
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IDE-Qbus/Unibus was:Re: Old IDE hard drives

by aek＠spies.com

It isn't a parallel port, it is a subset of the PC/AT bus, with x86 timings and a big bag-o-hacks to get DMA transfers to run a LOT faster than it was ever meant to run. Friends of mine and I have build interfaces off of an IDE connector that talk directly to 80xx peripheral chips because of the similarity in timing. The bus mastering side of IDE (esp if you're using a PCI interface) is the weird part.

22 years, 7 months

1
0
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[ebay] DEC Infoserver 150 with disk and CDROM

by lists＠microvax.org

I just spotted this in the US - it's going for a single dollar at the moment. I'm not affiliated (and I wish I was because i'd have it in an instant!) http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=3071461252&category=11… alex/melt

22 years, 7 months

1
0
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Battery connections on laptop.

by r.mueller＠fz-juelich.de

I just bought a somewhat older laptop, though I hope you will all forgive me if it is slightly younger than the borderline for the interests of this group (I am not sure on which side of the line it lies.) It is a Toshiba 4010CDT, which uses a Li-Ion battery, the subject of this message. I am amazed at the number of contacts between the battery and the computer (about 10) and wish to know their function. On the Internet I find nothing. On account of the short life-time of such batteries I want to install NiMH. I accept that I would have to use a separate, external charger, even removing the reserve battery fro the charging process, as the price of being able to travel with a back-up battery which would not die after two years of having it around. The problem is all those connections; I have no idea what they do and only a couple of them are needed for transfer of power to the computer. At least part of the rest must be communicating data about the state of the battery, either for the sake of charging or for warning of the soon-to-come shut-down for lack of enough power to continue. I would have to lie to the computer in such a way it thinks it is monitoring a Li-Ion battery, but to do it I need to know what the lies must say. Does anybody have a clue what the functions of these connections are? Keeping my fingers crossed, Bob

22 years, 7 months

2
1
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Great BYTE magazine cover prints on eBay . . .

by MTPro＠aol.com

Robert Tinney, the excellent artist who painted numerous BYTE magazine covers is selling much of his work on eBay for super deals. See: http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&userid=crawford… include=0&since=-1&sort=3&rows=50 Just thought I'd pass that along, best, David Greelish, classiccomputing.com

22 years, 7 months

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MicroVAX I update the 3rd, now being serialised in a local newspaper near you :)

by witchy＠binarydinosaurs.co.uk

More googling shows that the MV I and the MicroPDP can be very easily interchanged since they share memory modules etc, so I dug out my 11/73 and proceeded to spend a while tinkering with RT-11 again for the first time in nearly 10 years - there were files on there I'd changed in april '94 :) Looks like the RD54 (not the one I used as a load on the VAX) is possibly fading 'cos I got some overlay errors, but anyway.... The PDP still runs fine with the M7551 memory from the VAX so I know it's not a board issue I have with the VAX. Next thing to do I suppose is 'borrow' the PDP's cab to test the complete set of VAX boards, once I verify the PSUs are the same. That's a job that needs a lot of space which I don't have so I'll have to invade the kitchen next week when everyone else is out the house and hope I don't run into problems :) cheers -- Adrian/Witchy www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(

22 years, 7 months

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Check out TechTV | Homebrew Computer Club Reunion on The Screensavers

by Ladyelec＠aol.com

<A HREF="http://www.techtv.com/screensavers/shownotes/story/0,24330,3560406,00.html">Click here: TechTV | Homebrew Computer Club, </A> http://www.techtv.com/screensavers/shownotes/story/0,24330,3560406,00.html Homebrew Computer Club Reunion on The Screensavers The seeds of Silicon Valley's booming tech industry may well have been planted by the now-legendary Homebrew Computer Club. Friday the 16th. , we reunite members of the Club for a look at the past, present, and future of tech. Isa

22 years, 7 months

2
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Microvax III Hardware

by jeff.kaneko＠juno.com

The following items are available for shipping plus 15%. With thanks to Megan's field guide: 2 M7620 KA650-BA Q MicroVAX III CPU (workstation license), 90nS. 1 M7651-PA DRV1W-S Q General-Purpose DMA Interface (for BA200 series) 1 M7164 KDA50-Q Q Qbus SDI disk adapter, Q22 (1 of 2) (QDA SDI) 1 M7165 KDA50-Q Q Qbus SDI disk adapter, Q22 (2 of 2) (QDA SDI) 2 M7168 VCB02, QDSS Q 4-plane colour bitmap module 1 M7169 VCB02, QDSS Q 4-plane video controller module 4 M7621-AV MS650-AA Q 8-Mbyte RAM for KA650 (MicroVAX III) 1 M7622-BP MS650-BA Q 16-Mbyte RAM for KA650 (MicroVAX III) 1 M7769 KFQSA-S Q Storage Adapter (DSSI Disk Interface), BA200 series 1 M8634-PA IEQ11-S Q Communications Controller (IEC/IEEE) (for BA200 series) 1 M3127-PA DESQA-SA/SF Q Ethernet/thinwire adapter (DELQA+DESTA) with S-box handle 1 M8087-PA Q Scanner/printer to Q-bus DMA interface Some cables are available, ask. If I don't get any takers, the whole lot goes into the melter. I just don't have the place to keep them anymore. . . . Jeff ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today!

22 years, 7 months

2
2
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.PIC image file format

by d_cymbal＠hotmail.com

Hi, Does anyone have a description of the .PIC file format for images found on some CP/M machines? I assume the ones I am dealing with a DR Logo image files, but am not entirely sure. They are a binary format that apparently has the filename at the 0 offset. Any help appreciated. Thanks. dc

22 years, 7 months

1
0
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Whitechapel MG-1 : dead power supply ?

by mail＠softsmiths.co.uk

T I have heard there is a trick with mg-1 power supplies not working ... I cannot remember where i have seen it. If you have not heard of this trick let me know and i'll try and remember where i have seen it on the web rgds - Derek Mott

22 years, 7 months

4
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Battery connections on laptop.

by rigdonj＠cfl.rr.com

Some battery packs use separate leads for charging and to supply power. Also most packs (other than NiCad) have a thermistor to control the charge rate. Many also have a thermal circuit breaker. All of these require additional contacts. The Li-Ions in particular often have the circuit breaker since they are prone to exploding violently if they are improperly charged or used. In addition, some of the contacts may be paralleled with other contacts to increase the current carrying capability. You'll have to break open the pack to see exactly what they're all used for. Li-Ion, Ni-MH and most of the newer batteries have very exactly charging and use requirements. I STRONGLY recommend not switching battery types. Save yourself a lot of aggravation and replace the cells with the same type of cells. Spend your money on buying GOOD cells and not the Mexican or Chinesse made junk. I've had extremely good luck with the JAPANESE (NOT Mexican!!) made Sanyo NiCads but I can't say about the other type cells. Joe At 03:10 PM 1/15/04 +0100, you wrote: >I just bought a somewhat older laptop, though I hope you will all forgive >me if it is slightly younger than the borderline for the interests of this >group (I am not sure on which side of the line it lies.) > >It is a Toshiba 4010CDT, which uses a Li-Ion battery, the subject of this >message. I am amazed at the number of contacts between the battery and >the computer (about 10) and wish to know their function. On the Internet >I find nothing. On account of the short life-time of such batteries I >want to install NiMH. I accept that I would have to use a separate, >external charger, even removing the reserve battery fro the charging >process, as the price of being able to travel with a back-up battery which >would not die after two years of having it around. > >The problem is all those connections; I have no idea what they do and only >a couple of them are needed for transfer of power to the computer. At >least part of the rest must be communicating data about the state of the >battery, either for the sake of charging or for warning of the soon-to-come >shut-down for lack of enough power to continue. I would have to lie to >the computer in such a way it thinks it is monitoring a Li-Ion battery, but >to do it I need to know what the lies must say. Does anybody have a clue >what the functions of these connections are? > >Keeping my fingers crossed, > >Bob > >

22 years, 7 months

1
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"Scrap" PDP-11 boards on Ebay

by aek＠spies.com

Looks like lots of Q-Bus PDP-11 stuff, including a CPU and backplane. It's up to a measly $10.50 with two days to go. Item # 2588111758 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2588111758&category=1504 -- sigh... looks like the guy ripped apart a Unibus PDP11 system. There are boards there for a Kennedy tape drive, SMD drives, and a Emulex SMD controller.

22 years, 7 months

1
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DEC MINC-11 question

by TRASH3＠splab.cas.neu.edu

If it has been sitting for a while, reseat all the chips on each board, and then reseat all the boards. You can start by minimizing the number of boards in the system, try just the boot, memory and cpu boards, and see if the error goes away or changes. Chips do go bad, but many a time it has been oxidation on the pins of the DIP that go into the socket that makes a mess. Joe Heck

22 years, 7 months

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Battery connections on laptop.

by john_boffemmyer_iv＠boff-net.dhs.org

Yes, I know some of the functions (boss had a similar Toshiba). Apparently, it not only gives battery life/charge notification and monitoring, it also has battery temperature (for what reasons, I do not know since it was grossly inaccurate most of the time). There even was a diagnostic for Windows and DOS(boot floppy) that could be run and interface with the battery to find possible run time/length, stress test, possible recharge times, etc. I only know of the utility from a Toshiba tech mentioning it when my boss had a problem. I don't even know if that is actually available to the public. It was sort of like a rudementary serial interface to a battery. -John Boffemmyer IV At 09:10 AM 1/15/2004, you wrote: >I just bought a somewhat older laptop, though I hope you will all forgive >me if it is slightly younger than the borderline for the interests of this >group (I am not sure on which side of the line it lies.) > >It is a Toshiba 4010CDT, which uses a Li-Ion battery, the subject of this >message. I am amazed at the number of contacts between the battery and >the computer (about 10) and wish to know their function. On the Internet >I find nothing. On account of the short life-time of such batteries I >want to install NiMH. I accept that I would have to use a separate, >external charger, even removing the reserve battery fro the charging >process, as the price of being able to travel with a back-up battery which >would not die after two years of having it around. > >The problem is all those connections; I have no idea what they do and >only a couple of them are needed for transfer of power to the >computer. At least part of the rest must be communicating data about the >state of the battery, either for the sake of charging or for warning of >the soon-to-come shut-down for lack of enough power to continue. I would >have to lie to the computer in such a way it thinks it is monitoring a >Li-Ion battery, but to do it I need to know what the lies must say. Does >anybody have a clue what the functions of these connections are? > >Keeping my fingers crossed, > >Bob ---------------------------------------- Founder, Lead Writer, Tech Analyst and Web Designer Boff-Net Technologies http://boff-net.dhs.org/index.html ---------------------------------------

22 years, 7 months

1
0
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AMC Multibus cards?

by aek＠spies.com

Here's the list: Monoboard Computer AMC 95/4005 2 ea. Dynamic RAM Board 0095-0017 also marked 95/1032 in ink. 32K Ram 3310 Communications Controller marked 1119 in ink. Also marked 950134 95/6110 FD Control Board. Marked 994260-901 in ink -- www.bitsavers.org/pdf/amd/multibus/

22 years, 7 months

2
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Emulator search

by pete＠dunnington.u-net.com

On Jan 16, 10:00, Rob O'Donnell wrote: > > Somewhere out there in the world there is also at least one econet <--> > X.400 box, (coz I saw it on eBay) which was based on a BBC B with some > customer software/hardware - would be nice to get hold of the > specs/software on that too - could eventually link my emulated BBCs to the > Internet properly.. X.400 is a messaging (email etc) protocol; I think you've seen an Acorn X.25 Gateway. They weren't one of Acorn's success stories :-) I recall the Psychology Department at Edinburgh University had one, they intended it to link their Econet lab to the ERCC network and thence to JANET. It's a box with a BBC motherboard and some extra gubbins in it. You'd be better to run something like !Gateway on an Archimedes or RISC PC with an Econet and an Ethernet interface. -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

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Appearance on HGTV tonight (Sunday)

by vcf＠siconic.com

Tonight on HGTV I appear on the show "Hey, Remember!" where I'll be talking about old computers. It appears locally at different times so check your local listings. http://www.hgtv.com/hgtv/shows_hhey/episode/0,1806,HGTV_11739_29444,00.html -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

22 years, 7 months

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"Scrap" PDP-11 boards on Ebay

by wmaddox＠pacbell.net

The title says "20 Old Computer Boards/23lbs Scrap Gold", but if you read the rest of the listing, it describes all of the boards and claims they are pulls from a working system. Looks like lots of Q-Bus PDP-11 stuff, including a CPU and backplane. It's up to a measly $10.50 with two days to go. Item # 2588111758 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2588111758&category=1504 It looks like there are a couple of DEC boards in this lot as well: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2217820473&category=3360 --Bill

22 years, 7 months

1
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Emulation (Was: Emulators of Classic Computers)

by pete＠dunnington.u-net.com

On Jan 16, 4:43, der Mouse wrote: > >> What indeed... Now, Maplin do some nice 13mm LEDs, how big do you > >> think we could make a panel? How about the 3" LED clusters they use > >> as tail lights on buses round here? Make a PDP-8 6' across, like > >> the giant MS-20 that Korg made for demo tours in the 1970s? > > But then you'll need the MIG welder again :-) > > Details, details. :) > > Actually, I'm a bit interested in the other direction: how _small_ > do/can LEDs get? (And how much heat do they produce?) I've been > pondering something, but in order for it to be workable I need to be > able to cover fairly large areas with some kind of display technology > at a resolution no worse than about 75dpi. Since "large areas" means > dozens of square feet, too large for a CRT, all I've been able to think > of are LEDs. But I don't know how practical (or more likely how > drastically impractical) that is. Interesting... Smallest I've seen are surface mount, about 0.1" x 0.05". Not small enough for 75dpi, but perhaps you can get smaller arrays. However, even LCD displays for laptops are only about 75 dpi, and I suspect you'd get gaps between the arrays. Power? Well, rule of thumb is around 2V across an LED, at around 10mA, depending on the type and brightness you want. Suppose you used the surface mount types I've seen, that would be 10 x 20 = 200 in a square inch; at 10mA each that's 2A at 2V = 4W, or about 576W per square foot. I don't know offhand what the efficiency of an LED is, but a few of those would make a reasonable room heater :-) Of course, you could multiplex them and cut the power to maybe 10%-20% of that. -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

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Apple 'Star Trek'?

by pete＠dunnington.u-net.com

On Jan 16, 1:14, Witchy wrote: > I'll just make do with my NeXT Station for now :) Sleek. Black. No burn on > the screen and NeXTSTEP 2.3 installed. If anyone's got spare NeXSTEP media > I'll be all ears :) I wonder if it'll compile Moz Firebird? I'm sure I have a later version somewhere. I could burn a copy, though it might take a while to find it. -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

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Apple 'Star Trek'?

by witchy＠binarydinosaurs.co.uk

Hi folks, Googling around for more info on NeXT Computer to flesh out my new NeXT page on Binary Dinosaurs turned up something I'd really like to get my paws on but I'll bet was consigned to the bin straight away - the 'star trek' project started by Apple to port MacOS across to Intel hardware in the early 90s. So far I've found that a team of engineers succeeded in the port, but it was canned in 1993 when Apple was moving from 68K to PowerPC processors and it was found to be faster on a 486. The same tale reminds me that I'd really like a Be Box too :) Cheers, -- Adrian/Witchy www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(

22 years, 7 months

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5
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Emulator search

by classiccmp.org＠irrelevant.fsnet.co.uk

All this talk of emulators has got me thinking. (See you knew you could smell burning dust.) Does anybody know of an emulator of the BBC Micro that supports: - Econet (networking, preferably mapped over tcp/ip so I can run multiple emulators and have them talk to each other) - Serial Port as Telnet (A couple will map to COM1 etc, but would be nice to have a telnet interface instead) - Tube/65C02 Second Processor This is so I could set up my BBS again on a PC and not have to find space for half a dozen micros and a hard disc unit the size of a 1KW UPS. (And almost as heavy) Somewhere out there in the world there is also at least one econet <--> X.400 box, (coz I saw it on eBay) which was based on a BBC B with some customer software/hardware - would be nice to get hold of the specs/software on that too - could eventually link my emulated BBCs to the Internet properly..

22 years, 7 months

1
0
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Hmm...

by pete＠dunnington.u-net.com

On Jan 15, 20:00, Fred N. van Kempen wrote: > On Thu, 15 Jan 2004, Curt vendel wrote: > > > The Atari 822 Thermal printer was also an Apple ][ printer as well, I think > > it was an alp's I need to doublecheck, I saw the exact same printer in a > > very old Apple catalog long ago... the Atari 825 printer was a Centronics > > 737 > ... and wasnt that 737 also known as 'GLP' - Great Little Printer, > budnled with several Tandy and Commodore (via user port) 'puters > at the time? Similar but not the same. 737 is a 739 without the graphics ROM. -- Pete Peter Turnbull Network Manager University of York

22 years, 7 months

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Fwd: imm. help with a classic comp (NEC V20) reqd.

by india_50＠yahoo.com

--- Subramanian Iyer <india_50(a)yahoo.com> wrote: > Date: Mon, 12 Jan 2004 19:47:59 +0000 (GMT) > From: Subramanian Iyer <india_50(a)yahoo.com> > Subject: help with a classic comp (NEC V20) > To: cctech(a)classiccmp.org > > i could lay my hands on an old NEC V20(8088 i guess) > comp (a Hitachi Motherboard i guess no. HIL8) > recently. it must be atleast 15-20yrs old. it does > hv > all its components and interfacing cards along with > its bios. > here lies the problem. i don't hv any idea if it > works > or not. the pwrsupply works for sure (i checked). > the > monochrme monitor that i got with it does not work. > where should i start checking if it is working, if > the > bios, processor and other chips ar in good > condition? > i hv no idea.... > kindly help. > contact in pvt. for helping me... > Subs > > ________________________________________________________________________ > Yahoo! Messenger - Communicate instantly..."Ping" > your friends today! Download Messenger Now > http://uk.messenger.yahoo.com/download/index.html > ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html

22 years, 7 months

1
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Fwd: imm. help with a classic comp (NEC V20) reqd.

by india_50＠yahoo.com

--- Subramanian Iyer <india_50(a)yahoo.com> wrote: > Date: Mon, 12 Jan 2004 19:47:59 +0000 (GMT) > From: Subramanian Iyer <india_50(a)yahoo.com> > To: cctech(a)classiccmp.org > Subject: help with a classic comp (NEC V20) > > i could lay my hands on an old NEC V20(8088 i guess) > comp (a Hitachi Motherboard i guess no. HIL8) > recently. it must be atleast 15-20yrs old. it does > hv > all its components and interfacing cards along with > its bios. > here lies the problem. i don't hv any idea if it > works > or not. the pwrsupply works for sure (i checked). > the > monochrme monitor that i got with it does not work. > where should i start checking if it is working, if > the > bios, processor and other chips ar in good > condition? > i hv no idea.... > kindly help. > > Subs > > ________________________________________________________________________ > Yahoo! Messenger - Communicate instantly..."Ping" > your friends today! Download Messenger Now > http://uk.messenger.yahoo.com/download/index.html ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html

22 years, 7 months

1
0
0 0

Picked a Canberra 35 Plus???

by jrkeys＠concentric.net

At a auction today I got a lot that had a Canberra Series 35 Plus model 3502 something in it? I checked google and really found knowing that help figure out what this unit is? Anyone have a glue? Thanks

22 years, 7 months

4
3
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Emulators of Classic Computers

by msokolov＠ivan.Harhan.ORG

Vintage Computer Festival <vcf(a)siconic.com> wrote: > I may well be in San Diego in a couple weeks, but that's too far south. Too far south? San Diego is exactly where I am! Escondido specifically. E-mail me if you do come down here in a couple of weeks! MS

22 years, 7 months

1
0
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Emulators of Classic Computers

by msokolov＠ivan.Harhan.ORG

Vintage Computer Festival <vcf(a)siconic.com> wrote: > > Where are you located? > > The Bay Area (the REAL Bay Area ;) Well, then maybe we can meet next time I attend the annual Bay Area UFO Expo (every September), or the annual Conspiracy Con (held in the same place by the same people every May). Unless you come down sometime to South California where I am. MS

22 years, 7 months

2
1
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Looking for a parallel keyboard

by dwight.elvey＠amd.com

Hi Does anyone have a parallel out keyboard that they would like to sell to me? Dwight

22 years, 7 months

8
10
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Emulators of Classic Computers

by aek＠spies.com

I doubt that I will be able to locate a schematic given that I am having so much difficulty locating just a manual. -- Emulex sold the rights for their disc product line to a company in Guardian Computer www.guardian-computer.com

22 years, 7 months

2
1
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Emulators of Classic Computers

by msokolov＠ivan.Harhan.ORG

Fred N. van Kempen <waltje(a)pdp11.nl> wrote: > This (no more low-level tech hackers) might very well be a reality, > yes, if the current trends keep up. Scaring thought... According to the plan my girlfriend and I will start living together when she finishes high school this May. If we get married and I beget a son, I'll teach him how to be a low-level tech hacker and a ClassicCmp-er (among many other things), so there will be at least one. Heck, if I beget a daughter I'll teach the same to HER! MS

22 years, 7 months

4
3
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Emulators of Classic Computers

by msokolov＠ivan.Harhan.ORG

Vintage Computer Festival <vcf(a)siconic.com> wrote: > Hey, anytime! Where are you located? MS

22 years, 7 months

2
1
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HP 2114A value??

by rigdonj＠cfl.rr.com

I have an opportunity to pick up a HP 2114A with the 2155A I/O Expander and a 7900 disk drive. It was SUPPOSED to be complete and working when it was pulled out of service. The CPU is FULL of cards but only three cards in the IO Expander. What's something like this worth? The current owner wants some of my nicer areospace parts for it. Oh yeah, There's supposeed to be a good size stack of docs with this machine. We looked today but didn't find them. Anybody care to tell me more about the computer, expander or disk drive? Joe

22 years, 7 months

9
17
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HP2000/Access - in it's final form - alive!!

by MGemeny＠pgcps.org

Jay, Congrats on getting your system back up! I have a favor to ask. Could you give us times for Access to run these HP benchmarks. HP was kind enough to give us times for a number of other systems, but Access was not around when these numbers were published. I guess we should know which CPU type your Main is too. Were you able to get the HP2000 Access running under SIMH? It sure sucks a lot less juice than real hardware, and that translates directly into heat. The heat is reusable in the winter (free heat) but in the summer you have to pay a second time to get rid of the heat (AC). I have a number of other HIB tapes that I need to get converted and tested. Are you in a position to convert dot-tap files back to real (reel) tapes? If so I can post things for you and send you a URL for them. Otherwise I would have to get some scratch tapes and cut them here and mail them. How much disk are you running? We'll have to set up HIBE tapes that will fit on your system. We usually run 2 simulated 2883 disks for an Access simulation (50 MEG total) but that could be pushed up if we need it. Keep us posted. Mike. BTEST 10 REM HP benchmark taken from "E" IMS. Rekeyed by MWG. 20 REM 30 REM System Time to Run 40 REM C' 2 Min. 2.8 sec. 50 REM F 1 Min. 16.5 sec. 60 REM C 2 Min. 2.5 sec. 70 REM E 1 Min. 23.6 sec. 80 REM Access Unk. Jay? Want to help out here? 90 REM 100 READ L 110 IF L<0 THEN 999 120 DATA 60000. 130 DATA -1 140 PRINT "START=";TIM(0) 150 X=0 160 X=X+1 170 IF X<L THEN 160 180 PRINT "X=";X;"STOP=";TIM(0) 190 GOTO 100 999 END FPTS9 1 REM HP benchmark from "E" IMS. Rekeyed by MWG 2 REM 3 REM system time to run 4 REM C' 1 min. 58.2 sec. 5 REM F 1 min. 16.4 sec. 6 REM C 1 min. 58.2 sec. 7 REM E 1 min. 15.4 sec. 8 REM Access Unk. <-- Jay? want to help here? 10 DATA 5000 20 READ L 30 K=0 40 PRINT "start=";TIM(0) 50 I=0 60 J=50 70 I=I+J+100*(I-J)^2 80 I=I+I+I+I+I+I+I+I+I+I+I+I 90 J=I-J+I-J+I-J+I-J 100 I=J^(-2)+I*I*I 110 K=K+1 120 IF K<L THEN 50 130 PRINT "STOP=";TIM(0) 140 END

22 years, 7 months

2
2
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Emulators of Classic Computers

by msokolov＠ivan.Harhan.ORG

Fred N. van Kempen <waltje(a)pdp11.nl> wrote: > Geez, you should have lunch with Sellam, Michael.. :) Sure! Sellam? And Fred, what happened to your plan to come to Long Beach? I want to meet you too! MS

22 years, 7 months

3
2
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Picked a Canberra 35 Plus???

by technobug＠comcast.net

At Thu, 15 Jan 2004 14:33:40 -0600 "Keys" <jrkeys(a)concentric.net> keyed in: > At a auction today I got a lot that had a Canberra Series 35 Plus > model 3502 > something in it? [...] You are the proud owner of a Pulse Height Analyzer/Multichannel Analyzer (depending what's installed). These beasties are generally used in the nuclear physics area for spectrum analysis and timing analysis. Contact me off-line if you want more info... Claude Ceccon

22 years, 7 months

1
0
0 0

MicroVAX I update

by witchy＠binarydinosaurs.co.uk

Hi folks, Gave my 'new' MV I a good going over this afternoon and apart from the fact it has a pair of M7135s (MV I Datapath according to Megan's field guide) and came with a sodding great big (and heavy) Tek 4109 screen/keyboard/tablet/pointer there's nothing too exciting in there: M7551 & M8067 memory boards M7957 DZV11 mux M8639 RQDX2 to run the RD52 and RX50. This means there's still a couple of slots to add in a DEQNA should I want to get it on the network. It'll have acclimatised by tomorrow so can anyone give me the pinouts of the PSU so I can check voltages before I run the whole lot up? I'll trudge through the snow to dig out my MVII techref just in case they're in there, but if anyone knows off the top of their head that'd be great :) -- Adrian/Witchy www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(

22 years, 7 months

2
1
0 0

oddball televideo problem

by jwest＠classiccmp.org

I have a system that does an "autobaud" when you hit return to log in. If I hook up a VT220, it works at 7/1/E, 8/1/N, 7/1/O, etc. etc. no problem. If I hookup a Televideo 950, hitting return gets no response at all. This is NOT a DTE vs. DCE problem, because the televideo does work with the same system on a different type of serial port. I was thinking something might be brain damaged with parity generation/checking on this terminal. Is this a known issue of TV950's? About the only way I can find out whats going on is to dig out my datascope and see the start data & stop bits between the two when hitting return and see what is different. Any thoughts? Jay West --- [This E-mail scanned for viruses by Declude Virus]

22 years, 7 months

6
7
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Emulators of Classic Computers

by msokolov＠ivan.Harhan.ORG

Teo Zenios <teoz(a)neo.rr.com> wrote: > Highschool? Either you are into classic computers at an early age or your > one heck of a cradle robber lol. I'm 24 now. I mastered PDP-11 assembly at age 7. By age 11 wrote my own OS for a Soviet PDP-11 clone. But then I'm Soviet, so that should explain it. We Soviets are obviously superior. :-))))))))))))) My girlfriend is 18, but she is very mature for her age. And I have absolutely no fear about letting her around my classic computers since she has the highest respect for my work. We are both pagans and these computers support our pagan work. For her to screw up the computers would be equivalent to betraying her Goddess Herself. I will teach her how to use my operating system (a classic version of VAX UNIX, other people in my group run other classics OSes too), she'll have a terminal on her desk in our command room just like I do, and the policy of no pee seas with Weendoze being allowed in the house will be entirely reasonable and acceptable to her because it's the enemy's operating system. Other people on this list keep whining about their wives conflicting with their classic computing, but I will have a female partner using these great systems together with me in our pagan work, which has brought us together in the first place. MS

22 years, 7 months

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Young generation of ClassicCmp (was Re: Emulators of Classic Computers)

by msokolov＠ivan.Harhan.ORG

Fred N. van Kempen <waltje(a)pdp11.nl> wrote: > You're assuming he or she WANTS to know about "that stuff". My > son is now just over 1.5 years old... I'll await his reaction > to me talking about tech stuff... Well, with proper input from BOTH parents it would be a lot easier to raise him/her right. My gf is a witch (1st degree priestess, working on 2nd degree) and will also have a lot of "unusual" stuff to teach to our future children. They will be really fortunate to have a two-parent thoroughly pagan family. The way pagans raise their children is VERY different from the common American Judeo-Xtian way. A few months ago the Coast to Coast AM radio talk show featured two girls who were reading ancient Sanskrit and seriously getting into its teachings at ages 2 and 4. MS P.S. Anyone here a regular Coast to Coast listener? You may have heard me on the air, as I have called in a few times. Hoping to be a C2C guest some day.

22 years, 7 months

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New Computer Museum in Austin

by jrkeys＠concentric.net

Earlier this week I was told that Dell (Mr. Dell not the company) had purchased a very large old warehouse and was going to turn it into a vintage computer museum of his own. I was also told that he had sent out a team to locate old hardware and stuff for him. Anyone in the Austin area know about this?

22 years, 7 months

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physical tape drive emulation? ts-11?

by brad＠heeltoe.com

This may seem silly, but it occured to me this morning (musing about how to boot an old 11/34) that I could use a device which would pretend to be an actual tape drive. There are lots of tape images out there (on the web) in the form of big disk files. It would be nice to be able to turn one of my pc's into a "virtual tape drive" by plugging a cable from the pc into a TS11 controller... Has anyone ever seen such a device? seems like it would not be that hard to build (he said, never having looked at the interface between a physical tape drive and a controller like a TS11). I hope to find an old RL01/2 drive around the Boston area (anyone?) but even when I do it seems bootstrapping will be an issue. Even if I grab one of those Dilog controllers which talk SCSI I'll need some way to load up the drives initially. It's just that those 9-track drives are *really heavy* :-) any comments appreciated! -brad

22 years, 7 months

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Emulators of Classic Computers

by aek＠spies.com

even if we save the raw files, how will we view them in 50 (or even 5) years? -- The short answer: You won't -- The reason will be no one will have preserved the data describing the file formats, since it is "proprietary" And you won't be able to simulate the systems, because the data needed to simulate it is proprietary also. -- Two example systems I can think of right now: Schematics or chip designs done on products by Daisy Systems (dead, dead, dead) or Mechanical and electrical CAD designs done on Calcomp electronic drafting systems based on the Xerox D-machine.

22 years, 7 months

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Kaypro

by melamy＠earthlink.net

how much do you want for the 4? I live in Fredericksburg, VA 22406. best regards, Steve Thatcher Original Message: ----------------- From: Paul H Rivet energyx(a)ucs.net Date: Thu, 15 Jan 2004 10:49:34 -0500 To: cctech(a)classiccmp.org Subject: Kaypro Available for purchase I have a Kaypro 10 and a Kaypro 4. Both in excellent working condition with programs some manuals. PAUL H RIVET CREATIVE ENERGY LLC 35 West Orangeburg Road Orangeburg, New York 10962 845 359 4434 Fax 845 365 3650 -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .

22 years, 7 months

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Emulators of Classic Computers

by palazzol＠comcast.net

Hello, I just wanted to take a chance to plug MESS: http://www.mess.org/ It is an open-source, multi-system emulator for old computers and game consoles, based on the MAME codebase. If someone is interested in writing an emulator of an old system, this is one way to go. There is definitely a learning curve, but there are preexisting modules for many microprocessors. If anyone is interested in exploring this, feel free to contact me directly. Thanks, -Frank

22 years, 7 months

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Kaypro

by energyx＠ucs.net

Available for purchase I have a Kaypro 10 and a Kaypro 4. Both in excellent working condition with programs some manuals. PAUL H RIVET CREATIVE ENERGY LLC 35 West Orangeburg Road Orangeburg, New York 10962 845 359 4434 Fax 845 365 3650

22 years, 7 months

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KDJ-11A won't run

by gordonjcp＠gjcp.net

Hi there, I'm working on what I am led to believe is a PDP-11/73 (but it doesn't look like one). It *was* working last week, but one of the leads had dropped off the console socket on the back. On resoldering, it worked perfectly. Last night, when I opened it to fit the RXV21 another lead dropped of (RXD this time), so again, I resoldered it. I don't think this has much to do with the problem. When I power the machine up, the 2nd-from-right status LED lights up. >From googling, it seems this means "SLU Error". The Run light on the front panel comes on for a moment, then goes back out. The green LED on the KDJ-11A never comes on (but I'm not sure that it ever did). All the cards are firmly seated. Unfortunately I don't have a list of all the cards fitted to hand. >From memory it is (might help to read this in a monospace font): | M8192 | Serial? | | full width memory card | | RL02 Controller | | ST506 | Console/ROM | | M8029 | | Can't remember exactly, or quite what the cards are (some seem to be third party). One - does this seem to be a sane layout of cards (modulo uncertainty on my part); and Two - What would cause my SLU Error, and how should I proceed? Thanks in advance, Gordon Pearce

22 years, 7 months

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IBM series/1

by jwest＠classiccmp.org

I always kinda wanted one of these. But just right now is a bad time for me to buy another rack of stuff, so I'm passing it on. http://www.legler.com/equip.htm

22 years, 7 months

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Emulators of Classic Computers

by r_a_feldman＠hotmail.com

Hello All: I've just started a new job (!) at a small firm that does computer consulting for architectural firms. One project we are involved with is a study for the Art Institute of Chicago on how best to collect the digital design data (CAD files, 3D renderings, PowerPoint client presentations, etc.) that architects are more and more producing. One question that has arisen is, even if we save the raw files, how will we view them in 50 (or even 5) years? The AIC doesn't want to collect all the systems and software that architects use, so the suggestion to use emulators has come up. I'd like to pick the collective brains of the list and ask what emulators people know of. If you could email me at rfeldman<at>kfa<dash>inc<dot>com, listing the hardware and software emulated and what the emulator runs on, I'd appreciate it. Many thanks in advance, Bob _________________________________________________________________ Check out the new MSN 9 Dial-up — fast & reliable Internet access with prime features! http://join.msn.com/?pgmarket=en-us&page=dialup/home&ST=1

22 years, 7 months

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Looking to Restore PDP-8

by david＠dynamicconcepts.us

Greeting to all. I am looking to restore a PDP-8 computer (any flavor except PDP-8/A). Thought I had located a unit at a reasonable price, but the deal just fell throught. If anyone has items they would like to sell/trade/etc or know of some solid leads, I would be extremely grateful. The equipment will have a good home, and will be well cared for. I programmed PDP-8's from 1971 until around 1988 (continued to program PDP-11 and Vax machines until the mid 90's). My wife is claiming this is my "mid-life crisis". Who knows she could be right. I am especially interested in loacting a TU-56 tape unit to install on the machine. Ideally I will be able to get it running TSS-8, but may have to settle for OS/8. Also interested in ASR-33's with working papertape, as well as a high speed paper tape reader/punch (e.g. PC01). Thanks, and looing forward to hearing from all.....

22 years, 7 months

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Looking to Restore PDP-8

by dvcorbin＠optonline.net

Greeting to all. I am looking to restore a PDP-8 computer (any flavor except PDP-8/A). Thought I had located a unit at a reasonable price, but the deal just fell throught. If anyone has items they would like to sell/trade/etc or know of some solid leads, I would be extremely grateful. The equipment will have a good home, and will be well cared for. I programmed PDP-8's from 1971 until around 1988 (continued to program PDP-11 and Vax machines until the mid 90's). My wife is claiming this is my "mid-life crisis". Who knows she could be right. I am especially interested in loacting a TU-56 tape unit to install on the machine. Ideally I will be able to get it running TSS-8, but may have to settle for OS/8. Also interested in ASR-33's with working papertape, as well as a high speed paper tape reader/punch (e.g. PC01). Thanks, and looing forward to hearing from all.....

22 years, 7 months

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Looking to Restore PDP-8

by david＠dynamicconcepts.us

-----Original Message----- From: David V. Corbin [mailto:david@dynamicconcepts.us] Sent: Wednesday, January 14, 2004 10:14 PM To: cctalk(a)classiccmp.org Subject: Looking to Restore PDP-8 Greeting to all. I am looking to restore a PDP-8 computer (any flavor except PDP-8/A). Thought I had located a unit at a reasonable price, but the deal just fell throught. If anyone has items they would like to sell/trade/etc or know of some solid leads, I would be extremely grateful. The equipment will have a good home, and will be well cared for. I programmed PDP-8's from 1971 until around 1988 (continued to program PDP-11 and Vax machines until the mid 90's). My wife is claiming this is my "mid-life crisis". Who knows she could be right. I am especially interested in loacting a TU-56 tape unit to install on the machine. Ideally I will be able to get it running TSS-8, but may have to settle for OS/8. Also interested in ASR-33's with working papertape, as well as a high speed paper tape reader/punch (e.g. PC01). Thanks, and looing forward to hearing from all.....

22 years, 7 months

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Looking to Restore PDP-8

by david＠dynamicconcepts.us

Greeting to all. I am looking to restore a PDP-8 computer (any flavor except PDP-8/A). Thought I had located a unit at a reasonable price, but the deal just fell throught. If anyone has items they would like to sell/trade/etc or know of some solid leads, I would be extremely grateful. The equipment will have a good home, and will be well cared for. I programmed PDP-8's from 1971 until around 1988 (continued to program PDP-11 and Vax machines until the mid 90's). My wife is claiming this is my "mid-life crisis". Who knows she could be right. I am especially interested in loacting a TU-56 tape unit to install on the machine. Ideally I will be able to get it running TSS-8, but may have to settle for OS/8. Also interested in ASR-33's with working papertape, as well as a high speed paper tape reader/punch (e.g. PC01). Thanks, and looing forward to hearing from all.....

22 years, 7 months

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Emulators of Classic Computers

by r_a_feldman＠hotmail.com

I'll make some comments on several posts here, even though Sellam's is copied below. The committes working on the problem have come up with recommendations that match Sellam's points #1 and #2. It is likely that we will be able to get donations of software and documentation to handle some of #3. There is not much support for #4. Storage will probably be in a live archive such as DSpace or Fedora. As to emulators, we are interested in more than PC's. Some of the early CAD programs were in-house ones written at Skidmore Owens and Merril here in Chicago. They ran on PDP's (11?) using Tektronic terminals. In response to Ted's suggestion to make paper printouts, that won't work for a 3D model with a lot of attached information about materials, suppliers of doors, etc. If you output one view, you loose an almost infinite number of other views, as well as the attached information. Also, paper won't work for an animated fly-through of a building. Granmted that there are many problems with trying to preserve digital data that is in proprietary formats, but the AIC wants to make a start, and to be able to do it in a way that preserves as much of the richness of the data as possible. Bob Date: Wed, 14 Jan 2004 13:40:12 -0800 (PST) From: Vintage Computer Festival <vcf(a)siconic.com> Subject: Re: Emulators of Classic Computers To: "General Discussion: On-Topic and Off-Topic Posts" <snip> I would do this: 1) Gather all the relevant data files into one place 2) Find whatever technical data you can on the formats of the data files 3) Gather up all the applications used to create the various files and their documentation 4) Gather up all the operating systems that those applications run on 5) Burn this all to DVD ROM Keep this all on a "live" archive (i.e. a hard drive) and DVD ROM and update the medium (migrate the "live" archive to a new hard drive and re-burn the DVD ROMs or upgrade to the latest and greatest archival medium of the day) every 2-3 years. >I'd like to pick the collective brains of the list and ask what emulators >people know of. If you could email me at rfeldman<at>kfa<dash>inc<dot>com, >listing the hardware and software emulated and what the emulator runs on, >I'd appreciate it. Emulators for what? PeeCees? I don't think there are PC emulators yet, except on other platforms (like the Mac) for compatibility purposes. -- Sellam Ismail Vintage Computer Festival _________________________________________________________________ Find high-speed ‘net deals — comparison-shop your local providers here. https://broadband.msn.com

22 years, 7 months

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E11 and RT11v2

by aek＠spies.com

and while we're on the subject.. what ever happened to the software that John gave you? From: "John B" <dylanb(a)sympatico.ca> To: "Al Kossow" <aek(a)spies.com> Date: Fri, 4 Feb 2000 20:51:57 -0500 Jerome Fine is coming over on Monday so I will look tomorrow and see if we can find any on Monday. john

22 years, 7 months

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Lisa 2/10 HD question

by jos.mar＠bluewin.ch

So what is the actual harddisk in a lisa 2/10 ? I believed it to be a ST412, but the HD coverplate that is inside my Lisa does not match the ST412 in my 11/23 homebuilt ( not by me). The coverplate is, sadly, all that remains of the Lisa HD. The actual platter and heads have been trown away by the previous owner. Jos Dreesen

22 years, 7 months

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E1 and RT11v2

by aek＠spies.com

The V20C that I just tested was acquired in Montreal about 2 years ago. I acquired a number of RK05 media along with an RK05 drive. -- And Eric Smith has an empty spot in one of his racks that he travelled across the country to pick up, along with no software for the machine thanks to your 'rescue' efforts.

22 years, 7 months

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Canadians?

by waltje＠pdp11.nl

Hi all, Although my friends in South Park would hate me for sending this out... I need some help from someone in Canada, to buy something thats only available there, and not in the U.S. or Europe.. Pse contact me offlist if you can help.. Thx, Fred -- Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist Visit the VAXlab Project at http://VAXlab.pdp11.nl/ Visit the Archives at http://www.pdp11.nl/ Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Mountain View, CA, USA

22 years, 7 months

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AMC Multibus cards?

by aek＠spies.com

Does anyone have any information on ANY Multibus cards made by Advanced Micro Computer? -- yes send along the part numbers (probably four digits starting with 9xxx or 4xxx) and i'll put them up on bitsavers.

22 years, 7 months

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Emulators of Classic Computers

by dwight.elvey＠amd.com

>From: ard(a)p850ug1.demon.co.uk > >> I am having problems getting enough information to make my Emulex >> SC70 masbus disk controller work. If I have to repair it, I'm will >> be in serious trouble. I doubt that I will be able to locate a >> schematic given that I am having so much difficulty locating just > >If it uses standard chips (i.e. data sheets exist), then it can be >reverse-engineered! > >> a manual. The SC70 uses a 16bit 290x bitslice processor, so after >> those parts are no longer available, even though it would trivially >> fit into a small FPGA of the time, and even if the logic levels are >> compatible, reprogramming an FPGA to do what the 290x does will not >> be a trivial task. > >OK, the 290x chips are not simple, but data sheets exist, so it should be >possible to make an FPGA do the same thing. Oh come now, the 290X parts are not that complicated. The 2901 is just an ALU. I don't think there is anything in this series, including the 2916 that can't be easily implemented in todays technology. In fact, I'm sure you can even buy off the shelf models for these. I've seen things like 8051's and 6800's for those that need that fuction in a fpga. Dwight > >> >> Just imagine trying to repair all of the proprietary components >> in a PC or even the CAD program dongle 50 years from now. > >I knew there was a reason why I stuck to classic computers ;-) > >-tony >

22 years, 7 months

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E11 and RT11v2

by oliv555＠arrl.net

I was trying to organize some E11 stuff, spread over several computers, and could not get my rk05/RT11v2B to boot. Some years back when I first loaded these images, I thought these had booted for me, but maybe my memory is playing tricks on me. Anyone ever succeeded in booting v2B under E11? -nick o

22 years, 7 months

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HP2000/Access - in it's final form - alive!!

by jwest＠classiccmp.org

Well, the HP2K system restoration is done (except for the rails for the paper tape punch, but those aren't visible, it's temporarily mounted anyways). I've been through several sysgens and all is perfect. Even typed in a program I had a listing for that I wrote in high school that creates word search puzzles :) For those wondering, yes, I can confirm, 7906 drives (non H models) work wonderfully, you just don't get to use head 3 (at least for variants of TSB that support 7905's - variants that support 7900 or older (E) of course will not work with 7906's). I ran into a problem with the 7970, turned out to be a tape reel lockdown mechanism was faulty and the reel was slipping during use. That's fixed too. I am suprised how much heat the system generates! Now I'm looking for HIB tapes to get a respectable system library. I also ordered a wireless card for my PC downstairs, so I will be putting 2000/Access online via telnet for just a little while. Many people requested dialup access, but I think telnet will be easier. I want to give an extra special thanks to many people who have helped me along the way - Craig and Larry at Crisis Computer (call them for HP parts, great guys!), Al Kossow, Eric Smith, Jeff Moffatt, Bob Shannon, Stan Seiler, Frank McConnell, Bill McDermith, and... everyone on the classiccmp list for years of help and advice on various issues. What's next? Hummm restoring an HP 2610A printer? Or my 11/45? Or upgrading my 8E to use RK05? Or maybe finally getting back to hpemu? We'll see! Thanks very much folks! Jay West PS - Al, my MCP tapes are fine. It was the tape reel slipping that made me think it was bad!

22 years, 7 months

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Mouse doody

by tponsford＠theriver.com

Sifting through ye ol' computer shed, I brought down two alpha 255's I intended to combine and make one working machine. I was not too surprised to find that the local field mice had got inside the case through an open pci-slot cover and had made a nest. I cleaned out the seeds and wadding and mouse doody, but I need to probably clean to motherboard from mouse urine. Any suggestions?? I know urine can have a possible corrosive effect so I want to make sure I can clean the MB thoroughly, before attempting to put it back together. Cheers, Tom

22 years, 7 months

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MFM Controller queries

by kyrrin＠bluefeathertech.com

Hi, gang, I have an Atlantic Research 7000 series datascope that is dependent on an MFM drive to run itself. It works fine at the moment (testament to the durability of early drives, I suppose), but I would like to be able to take an image snapshot of its hard drive in case of failure. With that in mind, I'm starting to accumulate a small variety of MFM controllers (going for variety because I have no idea what the determining factor is going to be in which controller is able to read the drive). So far, I've found a WD1002-WA2 and a WD1003-WA2. I still have memories of the last and (supposedly) best MFM board that WD made, in the form of the WD1006V-MM2, but I've had no luck finding one as yet (nor do I know if I really even need one). Suggestions for what to go after would be greatly appreciated. Thanks much. -=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com kyrrin (at) bluefeathertech do/t c=o=m "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"

22 years, 7 months

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9825B

by hoang＠faho.rwth-aachen.de

Hi Tony, i read an email of you in internet about HB 9825B. I would like to know if the CPU of HP 9825 works with little endian or big endian format. Do you have any information for me about this old computer ? I'm trying to write a small testprogram (windows 2000 / VC++ 6.0) for directing the HP analyzer 4145A. Its manual has a sample program for this computer 9825B. If you have any information for me ... it is very nice. Thanks alot Hoang

22 years, 7 months

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H89 lives - but for how long?

by jack.rubin＠ameritech.net

Many thanks to Patrick Rigney for his help in getting my rickety H89 (it is literally held together in places with baling wire and wallboard screws) back on its feet - last nite it loaded and ran CP/M for the first time since ???. Here's my question - after the machine was running for a minute or so, the screen got very bright - the "black" background became green and the screen characters were so over-driven that they became "fuzzy". The brightness control worked (i.e. changed brightness levels) but the available range only went from "too bright" to "really too bright". After another minute or so, the brightness level gradually subsided back to normal and everything seemed ok for the next 20 minutes of operation. What caused the "glow" and what incipient failure does it suggest? [unpaid politically-correct endorsement]BTW - although Patrick is a regular participant in classiccmp, I "met" him through the Vintage Computer Market and his offer for NorthStar boot disks. Thanks Sellam and Patrick! Jack

22 years, 7 months

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Mouse doody

by technobug＠comcast.net

Some comments on cleaning electronics which have been despoiled by biorchid rodents and other sources: Loose stuff should be removed by dusting, vacuuming or blowing off the offending offal. However, in low humidity locations be aware that you can build up fairly large static charges can be generated by vacuum cleaners / air jets. I normally place boards on conductive mats and ground the nozzle to the mat, or in the case of cabinets, the cabinet. The remaining junk to be removed is either water soluble or not. If water soluble, water is the best means of cleaning. If insoluble, then a suitable surfactant added to water will remove oils, etc. That leaves the nasty stuff that requires a solvent. Isopropyl alcohol is a good starting choice - anything stronger is likely to dissolve wanted items. If you use soap do not use one that is extremely caustic - you can remove things that you want like the copper runs. Hand dishwashing soaps are generally safe. However, the last step in any cleaning process should be a rinse with ** de-ionized ** water and a thorough drying. This will remove any conductive remnants that remain. I generally air dry my stuff over night (Arizona, but recommend 6 months for Florida). If you are in a hurry, a hair dryer or and oven at 140F/60C will hasten things ( using heat guns and warmer ovens runs the risk of doing in capacitors and removing surface mount items). Distilled water can be used in a pinch, but be aware that the stuff is corrosive. This last step is especially important if you have CMOS or analog circuits involved. The military uses pure alcohol as a final step to remove any remaining water. However, the stuff they use is far less volatile than isopropyl and does not contain any water. Of late I have been playing with a daily shower cleaner (USA->TILEX Fresh Shower). The stuff has isopropanol, a great surfactant, and a chelating agent. The latter ingredient will take off those insoluble minerals that remain. Seems to work well. If you go this route, ensure that you read the label - there are shower cleaners that have acid in them and will definitely take everything off the board... Still do the de-ionized rinse afterwards. A couple of precautions: dip switches should be sealed with tape to limit wetting. I generally drop some switch lubricant/cleaner in each and exercise the switch subsequent to cleaning. Unplug and remove relays, if possible. Switches, relays, connectors, and edge connectors should get a treatment with a suitable lubricant/preservative. Lastly, you should do all the above in the undisturbed privacy of your home. A number of years ago, a friend's salt sculpture atop his TV broke filling the set with the super-saturated salt solution. I told him to take the set out back, remove the back, and hose it out. A nosy neighbor asked what he was doing and he said that he was watering the set to make it grow bigger. He related the line to the sheriff that subsequently showed up. I then spent the afternoon convincing the psychologist that hosing down a TV was a rational act... Claude Ceccon

22 years, 7 months

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