waashk/20ng huggingface dataset:
In article <1ree36INNdmp@darkstar.UCSC.EDU> speth@cats.ucsc.edu (James Gustave) writes: > >Could someone point me toward a source (FTP/BBS/whatever) for development >tools for the 8051 microprocessor.  I specifically am looking for a Macintosh >cross-assembler/disassembler.  Also, is there a mailing-list dedicated to >discussing the 8051?  Thanks. > >--  >________________________________________________________________________________ >james speth       email for pgp compatible public-key        speth@cats.ucsc.edu  I have the same question for any tools for the 6502 derivative processor the 65C816 processor (designed by Western Design Center).  Thanks, Oscar. <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  Oscar R. Mitchell   IBM Advanced Workstations and Systems Division    RISC System/6000(tm) - Future Systems Hardware Architecture and Design Group    Mail Stop: ZIP 9461    11400 Burnet Road    Austin, Texas   78758                               USA Phone: (512)823-0000    IBM Tieline:  678-8513                              USA "FAX": (512)838-8561     IBM VNet: OSCAR at AUSVM6    IBM InterNet: oscar@oscar.austin.ibm.com       USA InterNet: oscar@austin.ibm.com  #include <standard.disclaimer>   /* I DO NOT speak for IBM, only for MYSELF */ <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
In article <VL812B2w165w@inqmind.bison.mb.ca> jim@inqmind.bison.mb.ca (jim jaworski) writes: >What happens when DVC (Digital Videon Compression) is introduced next  >year and instead of just receiving squiggly lines on 2 or 3 channels  >we'll be receiving sqigglies on, let's see 3*10 = 30 channels eventually.  Since the digital transmission schemes include error correction and concealment, the performance remains about the same down to a very low carrier-to-noise ratio, below which it degrades very quickly.  Hence, digitally compressed TV is supposed to be less susceptible to interference than amplitude modulated TV.
rubin@cis.ohio-state.edu (Daniel J Rubin) writes:  >How hard would it be to somehow interface them to some of the popular  >Motorola microcontrollers.  I am a novice at microcontrollers, but I am >starting to get into them for some of my projects.  I have several 256k >SIMMs laying around from upgraded Macs and if I could use them as "free" >memory in one or two of my projects that would be great.  One project that >comes to mind is a Caller ID device that would require quite a bit of RAM >to store several hundered CID records etc...  Assuming 68HC11... In expanded muxed mode, you *could* do it. Much easier if you get a DRAM controller IC. The MMI 673102 could be used to implement this, or you could use a counter and a huge multiplexer to provide row/column/refresh address multiplexing. The thing with DRAMs is that they require wierd timing, address multiplexing, and refresh.  Actually, if you wanted to use a 68008 IC, you could look at AN897, which has a neat controller built in. There is also the 683xx, I think one of those has the DRAM controller built in. This one is for the 6664 DRAM, however, the 41256 has only one more address line, adding only another component or so. The 256k SIMMs are basically 8 or 9 41256 DRAM chips (or their equivalent in fewer packages).
In <1993Apr19.185326.9830@Princeton.EDU> mg@cs.princeton.edu (Michael Golan) writes:  >I was looking at the amps diagram for Sony 1090/2090 receivers, and I >was amazed to find a difference between the US and Canadian model >on the capacitor(s) that hangs off the output to the speakers:  >                         ------\/\/\----- to speaker (identical both models >from amp ---------------| >(idnetical both models) > >                        <  10  >                        > >                        | >                       -----                         >                      |     |                         >        0.022        ---   ---        Canadian model only! >     US model        ---   --- 0.047  >     and world-wide   |     | >     model only.      |    ---        Candian model only! >                      |    ---  0.047 >                      |     | >                       ----------- gound  >The board itself is also identical, with room for all three caps. The >US/Can versions is clearly indicated in both places.  >How does that make sense? 0.047/2 is 0.0235, essentially 0.022 for caps >(there are just standard caps, no special W/type/precision).   >Please explain this > Michael Golan > mg@cs.princeton.edu  The only explanation I can think of is that two capacitors in series can handle twice the output voltage. Sometimes two elco's in antiseries (you know, positive sides facing eachother) are used to obtain a large capacitor that can handle positive and negative voltages as well.  So there probably is no design-philosophical reason, but a production-cost one.  Best 73's
While I have gotten 8-9 years out of this digital receiver, it has been acting VERRY strange of late.  I hope that  the following	 symptoms may help someone diagnose the error:  - i know that whatever lithium memory backup it had - has long died thus if i unplug it - it won't remember the presets  - it has given up listening to the remote.  (i tried changing the remote's batteries) when i try a remote function - the receiver registers that it received it (a green remote light flashes) but the right function doesn't happen - if any function at all.  (also strange- when i hit  the "mute" button, for example, the display panel goes black - yikes-	 i've never seen that before ...)  - before all the strangeness started, the system turned itself OFF and ON again - by itself  - sometimes it won't play a radio station, so i have to kinda twist it  (yes kinda flex the motherboard, chasis) for it to get the radio tuning back - the aux in function always works however....  it is inconvenient, but NOT inconvenient enough to pay an  expensive repair fee.  while, i'm not a hardware guy, i wonder  if something as simple as a surge supressor will be a quick fix. the strange thing is that these symptoms come and go ...  someone told me this unit series has a bad Voltage Amp chip.
We've just been donated a large machine for use in our robotics lab. This device is complete with a 286 based controller, running the Intel RMX operating system.  Unfortunately, we don't have any documentation on RMX.  Can anybody out there in netland help?  Please reply via email; I don't regularly catch up with the news.  Thanks,  David Bull
In article <26APR199315293014@utkvx.utk.edu> iturriag@utkvx.utk.edu (Mr. Y) writes: [...] > >I am not quite so sure about the illegality of using a regular American phone >on your home system. I vaguely remember a few years ago, when "Deutsche >Bundespost" split into Postdienst, Postbank, and Telekom there was some >discussion about a new regulation. I know that cordless or cellular phones >still have to be approved by the Telekom, but does that hold true for regular >phones? In my areacode in Germany (2234 - Frechen, near Koeln) you can use >touch-tone dialing. I assume, however, that most areas are still exclusively >set to pulse dialing. Last time I checked (Jan '93) the Cologne areacode 221 >was still solely pulse dialing. > >BTW, touch tone does become more common in Germany, bringin with it the >flourishing of 1-900 services (in Germany 0190). I just hope we'll all have >ISDN some time at an affordable price - idle wishes... >  Does this imply the German tone dialing is compatible with the American  one?  I know at least the British system is not -- it is supposedly close  enough though that an American phone will work.  But my modem (American) has a special setting for British standards...  Michael
> Hi there, > Can anyone tell me where it is possible to purchase controls found > on most arcade style games.  Many projects I am working on would > be greatly augmented if I could implement them.  Thanx in advance.  Try Parts Express in Dayton, Ohio also.  They have a complete line of  professional arcade buttons, joysticks etc...  The have a 1-800 number so call 1-800-555-1212 and ask them what the 1-800 number for Part Express in Dayton, Ohio is.  I love the free 1-800 directory  assistance...                                                                 - Dan --               Daniel Joseph Rubin     rubin@cis.ohio-state.edu
alung@megatest.com (Aaron Lung) writes:  >In article <1qk724INN474@hp-col.col.hp.com> cab@col.hp.com (Chris Best) writes: >>I'm no expert at UPS's, but you said something that made it sound like >>you didn't realize something.  On a typical UPS (well, on ours, anyway), >>there is NO switchover from AC to DC.  All the protected equipment is >>ALWAYS running from the batteries (via an inverter), with the usual  >>condition of also having them on charge.  If the power fails, big deal -  >>the computers never see it (until the batteries start to droop, but  >>there's something like 60 car-sized batteries in that cabinet, so it  >>takes a while). >> >>If you were gonna run the guts on straight DC instead of an inverter, >>why not do it all the time?  Then there'd be no switchover to screw >>things up, and no having to sense the failure fast.  Just keep the DC >>on charge when the power is on, and it'll be there in zero time when >>you "need" it. >>  >Actually, it's a bit more complicated than that...I sounds to me, >your UPS takes in AC, rectifies it to DC to charge the batteries, and >then takes the battery DC and chops it to AC again, feeding your >equipment.  This approach is the easiest and cleanest way to >switchover from the mains to battery once your power kicks out since, >as you mentioned, nothing will know about what happened down the line.  >Another way to do the UPS scheme is to use the mains until you >lose power, and then kick in the battery backup with it's inverter to >replace the lost power.  The problem here is the switchover time and >you've got to resync the AC in no time flat. That's a standby unit not a UPS, otherwise there would be no interuption. Many standby units are labled as UPS's though.    			Morgan Bullard mb4008@coewl.cen.uiuc.edu 				   or  mjbb@uxa.cso.uiuc.edu   >Unfortunately, most everything is built around the assumption that >AC is available, so the UPS guys have to provide and AC output to >be usable...ya sorta have to make it work with what there already.  >Similar story with our telephone system.  It was first invented back >in the 1800's.  We're still using the same damn system (media) as they >did back then.  If I have a phone from back then, I can assure you >it'll work on today's phone system.  It costs too much to overhaul >everyone to a new system, so they make it work with what is out there.
In article <C5x75A.48H@ms.uky.edu> msunde01@mik.uky.edu writes: >In article <1r76sbINNkap@flop.ENGR.ORST.EDU> noeler@xanth.CS.ORST.EDU   >(Eric Richard Noel) writes: >> I hate hard copy manuals, and would rather have all docs online - *not* >> because I want to copy the program, but because its usually faster and >> and convenient than sifting through an old book I can't find. > >Just MHO, but I prefer hardcopy books because you can have three or four   >of them open spread across the bed (next to the desk in my dorm) and   >reference them while using the program full-screen.  The Windows Help   >things come closest to good on-line documentation I've seen, but they   >generally aren't detailed enough and would probably take a LARGE amount of   >space (even compressed) which is at a premium on my system . . ..  In   >fact, the manuals are the primary reason I bought Borland's C++ compiler   >instead of using the one the lab licensed (in the lab, of course).  I've   >got a SHELF full of books to help me out when I'm stuck.  :-)   To each   >his own . . . :-) >  Agree 100%, personally I cannot flip from page to page on a screen and retain information as easily as in the written page.  >>  >> Off deeper end-> Why does everyone think they need to be able to make a  >> backup copy? Almost all new software must be installed to the hard disk, >> so you are left with the originals as your backups. I think its a waste >> of time, space, and money, as well as it makes it to tempting to "lend" >> out the backups.  > >We've destroyed about six sets of original Microsoft Word for Mac 5.0 and   >Word for Windows (may have been a bad batch of disks).  Don't have the   >faintest idea what happened to them, they just went bad.  Weren't stored   >near any magnetic fields or otherwise mistreated, indeed they were only   >used once.  Given this, and the massive headaches finding a working set of   >disks to fix some of the machines that periodically go down, I'd say   >having working backups is a godsend.  I sure wish we'd had them (Sometimes   >I think Murphy's Law holds true more often than Newton's!!) when we needed   >them.  I think it's sortof like snake antivenin.  99.995% of the time you   >have absolutely no use for it, but when you need it, BOY do you ever need   >it! >  Ditto's ... in fact .. at work, where things are dead if the backup is no good, I insist on having at least a 2 level backup system.   It seems that whenever you have 2 good backups, you never need them,  but if you don't have them, Murphy guarantees that you'll suffer for it.  >I don't have backups of my originals at "home" but then my machine doesn't   >see anywhere NEAR the use/abuse of these here at the lab, and so I   >consider it less of a risk.  Still, I usually make "working copies" of   >them when I install them and then eventually re-use these "working copies"   >for something else. . .. > > >>  >>  >> No flames intended - just my thoughts. > >Just mine, too!  :-) >   and mine of course.
myers@hpfcso.FC.HP.COM (Bob Myers) writes:  > > I am looking for any info I can get on the NEC 3D monitor. > > I know that it is a multisync but that is about all. > > I plan on buying one second-hand in a while depending on its specs. > >  > > Does anyone know the min/max frequencies, whether it is interlaced,  > > non-interlaced, or both, video compatability, etc? > > I have seen a reference to it being .28 pitch with 1024 X 720 resolution  > > and that it supports SVGA from one source and that it doesn't support  > > SVGA from another source.  (Neither source seemed to have much reliable  > > info so I don't want to take a guess.) >  > I'm at home right now, and so am away from my monitor files; the following > is off the top of my head, subject to revision, worth-what-ya-pay-for-it > sort of info.  If you don't hear from anyone who has spec sheet in hand, > e-mail me and I'll look it up. >  > If I'm remembering correctly, the 3D is a 14" 0.28 mm pitch multisync that > covers at least VGA (31.5 kHz horizontal, 60 Hz vertical) to 1024 x 768  > 60 Hz (which is going to be about 48 kHz horizontal).  It may go somewhat > higher than that on the horizontal, but you won't be happy with anything > beyond 1024 x 768 on a 14" 0.28 tube; you probably won't be too thrilled > with the 1024 x 768 on this tube, but it *will* sync up and display it. > (I prefer at least a 16" 0.28 for this resolution.)  Since SVGA is 800x600, > it'll do that too.  The horizontal range probably goes lower than 31.5, but > I don't know if it goes all the way down to straight NTSC-rate TV (which need > about 15.75 kHz sweep).  As far as "video compatibility" (if I'm reading > the question right: it won't take anything but analog RGB inputs.  In other > words, it has no way to decode NTSC or Y/C video inputs.  You would need > some sort of board to to this conversion - like the sorts of things that  > let you display NTSC on a VGA display. >  > Hopefully, now, I'll see this response of mine, and it'll remind me to > look this stuff up and confirm it.  (Or force me to post a hasty retraction!)  Ok, I was under the impression that it accepted digital input.  I still don't know for sure if it accepts BOTH interlaced and  non-interlaced as I have gotten conflicting info.
In article <1993Apr6.132429.16154@bnr.ca>       moffatt@bnr.ca (John Thomson) writes:   >Joseph Chiu (josephc@cco.caltech.edu) wrote:  >  >: Thus, a deciBell (deci-, l., tenth of + Bell) is a fractional part of the  >: original Bell.  For example, SouthWestern Bell is a deciBell.  >  >Out of what hat did you pull this one?  dB is a ratio not an RBOC!  >  >: And the measure of current, Amp, is actually named after both the AMP company  >: and the Amphenol company.  Both companies revolutionized electronics by  >: simulatenously realizing that the performance of connectors and sockets  >: were affected by the amount of current running through the wires.  >  >Sorry.  The unit for current is the AMPERE which is the name of a french-man  >named AMPERE who studied electrical current.  The term AMP is just an abbreviation  >of it.  The company AMP came after the AMPERE unit was already in use.  >  >: The Ohmite company was the first to characterize resistances by numbers,  >: thus our use of the Ohms...  >  >I don't know about this one, but it doesn't sound right.  >  >:  >: Alexander Graham Bell, actually, is where Bell came from...  >Well you got one thing right!  >:  Actually, I think J. Chiu knows the score and is just being silly. However, "decibel" is in fact 1/10th of a bel. He is right on that one, but I don't know if it was accidental or not.  Strictly defined, a bel is the ratio of the log of two power levels, and a decibel is 1/10th of a bel so you have 10X decibels for every bel, hence bel=log(P2/P1) and decibel=10Xlog(P2/P1).  The bel, ohm, volt, farad, ampere, watt, hertz, henry, etc. are all named for pioneers in the field. It's a traditional and fine way to honor researchers who discover new knowledge in a new field. Hertz was one of the most important of the early electronics explorers, but had been left out in having a term or unit named after him until recently, (1960's, prior to that what is now a hertz was a cps.) All the other units were defined many decades earlier.       --  ----------------------------------------------------------------------
What kind of CSA/UL/FCC approval do $60+ mail-order PC computer cases and power supplies have?    Can I assume that the certification process for small-scale custom hardware (ie digital/analog circuitry) is reduced, or even eliminated, if I use such a case and (certified) power supply?
In article <1qk158$kcp@bigbird.hri.com> obrien@bigbird.hri.com writes: >I just got an IBM-PC XT with no documents. Its a true >IBM, and I was wondering if anyone had the definitions >of the 2 8 position dip switches?   SW8,SW7	number of 5.25" drives 0,0	1 drive 0,1	2 drives 1,0	3 drives 1,1	4 drives  SW6,SW5	type of display 0,0	reserved 0,1	40x25 color (mono mode) 1,0	80x25 color (mono mode) 1,1	mono 80x25  SW4,SW3	amount of memory on system board 	64k chips	256k chips 0,0	64k		256k 0,1	128k		512k 1,0	192k		576k 1,1	256k		640k
A while ago I saw some translucent pads, about 6"x8" or so that  could be plugged into (something) and they would glow.  One was red,  another green, another blue.  Interresting.  I was wondering if anyone  would have a feed on anything of this nature, and of the price.    oh, the pads were rubber-like and were floppy like, about 1cm thick or  so.                   Thanks.       _________________________________________________   Inspiration  |   ___                             |   comes to     |  \   o  baden@sys6626.bison.mb.ca |   those who    | (  ^  ) baden@inqmind.bison.mb.ca |   seek the     |   /-\      =] Baden de Bari [=    |   unknown.     |                                   |
Two or three years ago I saw a report on TV about a company that had  developed a method of making solar cells on a flexible substrate. My failing memory has convinced me it was some flexible metal. I now have an application that requires a flexible solar cell and was hoping someone out in netland knows something about this company or a similar product. Any help would be greatly appreciated.
Thanks for the resposes as they were all good ideas and I am looking at using a couple of the ideas. I recieved in the mail today the spec sheets on the mil. spec version of Exar's XR-2240 timer/counter chip. It is stable down to -50 C and sucks very little power. They show an application for a ultra-long time delay (up to several years depending on the RC time constant). In this application, they have two of them cascaded together. The reset and trigger pins of both chips are tied together and the timebase of the second chip is disabled. In this configuration, the output is high when the system is reset. When triggered, the output goes low and stays that way for a total of 65,536 x the timing cycle of the first chip. The total timing cycle of the two chips can be programmed from To = 256 x R x C to 65,536 x R x C in 256 steps by selecting any combination of the counter outputs to the timer output. The beauty of it is, the timebase chip would only have to have a 100uF timing cap and a 391K resistor for 39.1 seconds per timing cycle. So I can get a maximum of 2,562,457.6 seconds between timing cycles (39.1 x 65,536 or about 29 days !) Of course, that's much more than I need (14 days). But the counter allows for 256 binary steps that can be selected for the output for the 'pellet puker'. After the first 14 days and it trips, it would reset its self for the next 14 day timing cycle and so forth.  Power is still a problem though. A few ideas that you suggested was to bury the electronics in a hole dug in the snow (as an insulator) and put the pellet puker up on a tower above the estimated snow fall with a solar panel on it to keep a charge on a lithium battery pack. I like that idea ;-) This thing has to work for at least six weeks for three samples and the gas valves are 12 volts to spit the pellets out onto the snow. Anyway, I ordered the XR-2240's to see what I can do with them. Should be interesting (as long as I'm not the one that has to go digging up the pellets in the middle of Antartica freezing my buns off ;-)  Thanks again everyone...
In article <120466@netnews.upenn.edu>, jhaines@eniac.seas.upenn.edu (Jason Haines) writes: |>  |> 	I was wondering if people had any good uses for old |> 256k SIMMs.  I have a bunch of them for the Apple Mac |> and I know lots of other people do to.  I have tried to |> sell them but have gotten NO interest. |>  |> 	So, if you have an inovative use (or want to buy |> some SIMMs  8-) ), I would be very interested in hearing |> about it.  The most practical use I've seen for them is as key ring ornaments :-)
In article <1993Apr21.204556.21262@cronkite.ocis.temple.edu>   camter28@astro.ocis.temple.edu (Carter Ames) writes: >  >    I was just wondering one thing, actually two. ( I hope that this is   the > proper place to post this subject) >  >   Why does a lead acid battery discharge and become dead (totally   unuseable) > when stored on a concrete floor?   >   I decided to bring the battery in from the lawn mower and the   motorcycle > from the unheated garage this year, *to preserve them* and I just > went to use them and noticed that not only do they not work, but  > they act like the two terminals are shorted.  I asked a friend > and he said that you should never do that, 'cause it ruins them, > but he couldn't tell me why. >  > thanks > camter28@astro.ocis.temple.edu   What happens is that (I heard this discussed on "Northern Exposure") there   is a molecular juxtaposition of the molecules in the battery and the   molecules in the concrete.  This acts as an attractant to UFOs (actually   their crew members) and they arrive at the scene of the battery/concrete   combination.  Then they proceed to SUCK ALL THE ENERGY OUT OF THE BATTERIES!  Remedy:  Set the battery on a nonconcrete floor.