A130 Apologies if this has been discussed already - I couldn't find anything definitive in searching back-posts. I'm looking for a way to jump to a particular X value on a plotted graph. Using the cursor keys with trace enabled seems horribly tedious at times. accurate answer - this isn't what I mean; I simply miss the ability to view (with some speed) the approximate function result without having to scroll all the way there. The way I'm doing it now just seems silly. eshylay ==== Apologies if this has been discussed already - I couldn't find anything > definitive in searching back-posts. > I'm looking for a way to jump to a particular X value on a plotted graph. > Using the cursor keys with trace enabled seems horribly tedious at times. missing something? Isn't this a fairly simple, pretty fundamental feature to > be without? Is any software available to support this feature somehow? I don't > understand the internals of the 49G software - can a function be added to > the current (in-built) plotting application, or would an entirely new > application need to be written for this one feature? Is the (in-built) > plotting application part of the ROM. Any known work-arounds? > Obviously, I evaluate the function in the command line if I'm looking for an > accurate answer - this isn't what I mean; I simply miss the ability to view > (with some speed) the approximate function result without having to scroll > all the way there. The way I'm doing it now just seems silly. eshylay The only things I know about are (1) that right-shift hold with an arrow key moves to the edge of the graph space, (2) You don't have to have the cursor on the curve to look for a root or an extremum, only near the correct point horizontally (vertical position is irrelevant). ==== [If this has been discussed here before, please point me to it. Thanx.] The HP49G sometimes gives incorrect answers when ->NUM performed on ratios of large integers. In the following examples, exact mode is assumed. ========== Example #1 ========== 1000000000001/1000000000002 (eleven zeros in each) ->NUM yields 1. But the correct answer (rounded to 12 decimal places) is 0.999999999999 Admittedly, that's only off by 1 in the last place, but I thought the HP49G had the ability to always get simple divisions correct to the last digit. ========== Example #2 ========== 199999999999499/199999999999500 (eleven 9's in each) ->NUM yields .999999999995 But the correct answer (rounded to 12 decimal places) is 1. That's *five* off in the last place. Not good. ========== Questions ========== Is the problem that the integers are converted to reals before performing the division? If so, is there an easy way to obtain accurate ratios of large integers on the HP49G? Thanx in advance to anyone who can shed some light on this... even if it's something blindingly obvious to all but me. -jkh- Joseph K. Horn joehorn@holyjoe.net ==== Can somebody say what the adress is from the basic command GROB? How do we do textbook mode in sys-rpl? the message handlers for the DoInputForm, where can I find them? How do we display text as the inference aplet when you press on help? That was it for now. ==== > Can somebody say what the adress is from the basic command GROB? GROB is not a command but a keyword understood by the command line compiler. So it doesn't have an address. > How do we do textbook mode in sys-rpl? Are you referring to the VIEW bit? the message handlers for the DoInputForm, where can I find them? Search in the HP48 forum > How do we display text as the inference aplet when you press on help? Go to my web site: Www.epita.fr/~avenar_j/hp/39.html and download the stats source code. You will see how you can write advanced aplets ==== > Can somebody say what the adress is from the basic command GROB? GROB is not a command but a keyword understood by the command line compiler. > So it doesn't have an address. > How do we do textbook mode in sys-rpl? > Are you referring to the VIEW bit? >> I would like my calculations to be displayed like the 'show' in homescreen! > the message handlers for the DoInputForm, where can I find them? Search in the HP48 forum > How do we display text as the inference aplet when you press on help? Go to my web site: > Www.epita.fr/~avenar_j/hp/39.html and download the stats source code. You > will see how you can write advanced aplets > ==== I have converted 12 new games for various HP calcs. See my website: http://www.noda.online.fr WARNING: A bug have been reported with teh hp49 version of BomberHP, it can cause TTRM sometimes! I'll fix it as soon as I find teh bug. ==== > I have converted 12 new games for various HP calcs. See my website: > http://www.noda.online.fr Cool... > WARNING: A bug have been reported with teh hp49 version of BomberHP, > it can cause TTRM sometimes! I'll fix it as soon as I find teh bug. Be sure to notify (at least me) in this NG, because I like Bomberman (assuming itÇs Bomberman, converted from the PC-game of the same name).... Martin J. ==== X > p.s Bravo to N.Karagiorglou for his marathons.(I still do not know all > the things you are writing about but i am trying) > The impossible name striked again, it's Karagiaouroglou but I guess > even copy-paste can't work with that string ;-) What's up Doc Banner? You have those nasty ALGebraic smileys again!! >-:< GRRRR ==== > X > > p.s Bravo to N.Karagiorglou for his marathons.(I still do not know all > > the things you are writing about but i am trying) > The impossible name striked again, it's Karagiaouroglou but I guess > even copy-paste can't work with that string ;-) > What's up Doc Banner? > You have those nasty ALGebraic smileys again!! Oops! Correct them quickly.. {-B > >-:< GRRRR Doesn't look very peacefull, ehm... sorry??? (Diplomatic approach) No, not that, not my HP49G! > <49BORG assimilation begins....the picture of Mark changes slowly to...> < [-:[] (Hulk with HP49G in brain-bean-soup) > Greetings, Nick Banner, green(k) and incompatible. ==== Google reveals that this discussion was already had about a year ago, when I thread to stop, and it eventually did. But John Meyers has kept right on using comp.sys.hp48 to proselytize for his religion. reasoned posting. Loose End 2 is my 3-month-old unanswered challenge to John Meyers, which boils it all down to a single question. +--- LOOSE END 1 ---+ | | | JEAN-YVES AVENARD | | | +-------------------+ > The claim that transcendental meditation is the world's only hope > for peace is based on the hypothesis that human thought is capable > of producing effects at a distance. John Meyers has stated that > there is scientific evidence ... I don't not believe that that's what TM is about. I've never read > anything about people influencing others with some kind of telepathy. > It is based on the simple rule that if a certain percentage of the > population is actively involved in peace and human evolution, then it > will have a strong influence on others. of work does not run into such things (fortunately for you). Mine does (unfortunately for me). You are correct that TM is not telepathy, but John's own university claims that its methods ARE based on the possibility of action at a distance: http://www.mum.edu/m_effect/th_and_res_doj.html Conflict Resolution through the Maharishi Effect and it uses the exact phrase action at a distance referring specifically to the so-called Maharishi Effect. I do not know in what field Orme-Johnson got his Ph.D., but his claim that radio and gravity are propagated instantaneously by action at a distance (rather than by propagation at the speed of light) is contrary to modern (Corvallis, Oregon): http://zebu.uoregon.edu/~js/glossary/gravity_waves.html > Put in a room 100 angry Joe Horn's. A fight is likely to occur. Nah. I always agree with me. >:-) > Put 99 Joe Horns and 1 all-peace JHM course of events may change. John's recent postings railing against those who disagree with him (especially me) *exude* peace, don't they? Like the times he disdained my status as an ordained minister. Shows real tolerance doesn't it? (Forgive me if you meant all-peace facetiously.) > In any case, Joe as you're the voice of the Church and its people > (as a priest), I find your last posts extremely disturbing: You are > preaching violence and death. Since I am being misrepresented here, let me set the record straight. I promote the right of sovereign nations to self defense against unjust aggressors, using whatever force is necessary to protect their own people's lives, liberty, and property, even if that be deadly force. An unjust aggressor freely and willingly forfeits his right to life and brings his own destruction upon himself; his death is not the fault of those who are trying to stop his attack. Violence and death? Au contraire! I promote the active stopping of anyone who would rob peace and life from us. Same reason that policemen carry guns in the USA: not to cause violence and death, but to promote peace and protect life. Thet's why policemen and called peace officers and one model of pistol is called the peace maker. I promote peace, but not pacifism. In simple terms, if you start violence against me, I'll stop you, with violence if necessary, even if it kills you. Your death is not my goal; my goal is the STOPPING of your attack. Period. If that stoppage kills you, or doesn't kill you, I don't care, as long as you stop attacking me. THAT is what I promote. I hope it's clear now. Secondly, how did France obtain the peace that it now enjoys? How did the United States obtain its peace? How did all of today's peaceniks obtain their freedom to protest the war? Through the blood, sweat and tears of thousands of people who were willing to FIGHT for their rights and the rights of their posterity. They WON that peace and freedom through military VICTORY. Not through yogic flying and self-hypnosis inside gold domes. Thirdly, my ONLY GOAL is for John Meyers to stop proselytizing here for his religion, because I think it's intrinsically flawed in a way that's actually dangerous. Pointing out the bad things that Christians have done over the past 2000 years has no bearing on that GOAL, since I do not preach Christianity on this newsgroup, but keep it where it belongs, namely my church's pulpit and my website's homily archive. As soon as John stops posting sermons and sticks to the newsgroup's topics, OR warns the reader with OFF TOPIC indicators, then of course I won't pester him about his personal beliefs. I hope the above ties up that loose end. +-- LOOSE END 2 --+ | | | THE CHALLENGE | | | +-----------------+ Here's the deal. Three months ago (17 December 2002) I simplified the debate John: May I propose a new strategy that's much simpler and less stressful? All it takes is for each of us to answer one question: QUESTION FOR YOU: What would it take to convince YOU that thoughts alone CANNOT have any effect at a distance, no matter how deep those thoughts are, or of what, or by whom, or how many, etc? YOUR ANSWER: ________________________________ QUESTION FOR ME: What it would take to convince ME that thoughts CAN have an effect at a distance? journal. By mainstream scientific journal I mean any of the hundreds of online journals listed by Stanford at http://www4.tdnet.com/stanford/ or by MEDeZONE at http://www.medezone.com/173.html or by the NIH at http://www.nih.gov/science/journals/ or the Phoenix Foundation at http://www.bioport.org/readroom/journal.htm or any similarly acclaimed and accepted journal. I will NOT accept any other evidence. If you can provide what I require to be convinced, then you win, and I'll abandon my belief that thoughts do nothing. If I can provide what you require to be convinced, then I win and you'll abandon your belief that thoughts can have external effects. If neither of us can provide what the other requires, then further debate will probably only add heat and not light. In that case, it's probably best to agree to disagree. If anything above is unacceptable, please let me know, and read no further. Otherwise, I eagerly await your answer to #1 above. I hope this leads to more light and less heat. John was presented this challenge three months ago (17 December 2002) and he has yet to reply to EITHER part. It remains a loose end. -Joe- ==== > my belief that thoughts do nothing. If prayers are thoughts, and people pray for something to happen, then thoughts can do something, if you believe in prayers... Jordi. ==== Not the human thoughts, but God listens to prayers and He does the deeds, not man's thoughts There is a huge New Age difference in these things! my belief that thoughts do nothing. If prayers are thoughts, and people pray for something to happen, > then thoughts can do something, if you believe in prayers... Jordi. ==== What's gotten into you? Are you so universally bored that you couldn't resist the temptation to provoque this newsgroup into a utterly confusing and confused rant which has no place in this forum? Come on! Take a break! I, for one, am totally confused about what you're trying to say! Please... Let's change ourselves before we try to change the world! ==== Wouldn't it be great to have a better solution to connect the 49G with the PC ? eg. ... like the one made from and for the HP 200LX community, with the help of the Total Commander (formally known as Windows Commander until november 2002), the multi-functional filemanager for windows. It has a similar dual-pane layout as the famous Norton Commander from the old MS-DOS days, and is a great Windows Explorer replacement. ***Who would be able to build up a plugin for this application ?*** Check http://www.ghisler.com/ and http://members.lycos.co.uk/maxwish/tc_wfx.html HPLX A plugin for TC which views Palmtop's files. Quote from a 'HPLX Mailing List' user: The palmtop is connected to the desktop via a serial cable and after installation, you can see (and operate on) the files in the palmtop as easily as you can on desktop files. If the palmtop is asleep, it will be awakened. This is similar to what you can do with the connectivity pack, but I think it is more solid and does not seem to drop off and collapse in mid-transfer as the connectivity pack does sometimes. I have it working at 115200 and experience no troubles Made by Pavel Zampach. - version: v1.0 DOWNLOAD -- Carlos Lacroze Buenos Aires, Argentina what other calculator has a website of the likes of.... hpcalc.org ? what other calculator has so many web stores devoted to selling cards and accesories for only a single calculator ??? what other calculator supports such flexibility, assembly-language programming capability and open-system architecture ?? As a lecturer at University, I get to see all sorts of calculators that the students bring in.... but I am yet to see one that seriously competes with hp in the OVERALL analysis.... some have one thing and some another but NONE of them have everything just right. Even if they do go off the market entirely.... all that will happen is that their value will APPRECIATE with the years. Do you know of any other calculator that can claim this ???? All others are forgotten as the models change.... but there will always be a buyer for an HP48 ==== > what other calculator has a website of the likes of.... hpcalc.org ? The ti has ticalc.org, and calc.org. Much of the basic programs on ticalc.org is crap. The new archivers for ticalc.org are quite excellent. They've been going through the pending queue at a couple hundred files a day now. How fast does hpcalc.org take to update files? I do like hpcalc's more subject specific organization. Calc.org is lagging right now. > what other calculator has so many web stores devoted to selling cards and > accesories for only a single calculator ??? I would care if my 89 had an expansion bay. But there are other peripherals that can be found. Radio link kits, devices for taking external data, overhead projectors, infared links, ect > what other calculator supports such flexibility, assembly-language programming > capability and open-system architecture ?? The oncalc developement utilities for the ti are lacking. But the PC based utilities are excellent. Please look at tigcc.ticalc.org. I would not want to develop assembly on calc. There was recently released an IDE, Assembler, C compiler package for on calc use. As of right now the ti89 rom has more than a thousand rom calls available, Yes it is a very open system architecture. There are deliberate restrictions created by ti on the 68k series, but those are easy to get past. Assembly is very flexible on the 89. It is possible to hook into the hps entry line, watch what the user types and offer auto-completion suggestions? This is very possible on the 89. Accessing commands with pure typing and auto completion is faster than soft menus. If You are looking to start a flame war Please come into ti territory: http://pub26.ezboard.com/btichessteamhq or http://www-s.ti.com/cgi-bin/discuss/sdbmessage.cgi?databasetoopen=calculator s&topicarea=TI-89/Voyage+200/TI-92+Plus&do_2=1 And My page where you can find a) auto completion for the home entry line, and b) a kick-ass equation writer. And much more for the ti89: www.calvin.edu/~sstear70/ -Samuel Stearley ==== PLEASE do not start it! Not again one of those fight to the death against all barbarians! (they are, aren't they?) You are asking for trouble... Let us see the silly responses.. :-) !Demeter! ==== Just a quick apology. Wheather your looking for a flame war or not you are more then welcome to post questions at either of those forums. The ezboard one is devoted to c for the calc. -Samuel ==== > As a lecturer at University, I get to see all sorts of calculators that the > students bring in.... but I am yet to see one that seriously competes with hp > in the OVERALL analysis.... some have one thing and some another but NONE of > them have everything just right. The HP48 obviously doesn't have everything just right, either. If it did, there would be no reason to release the HP49G. That is not to say that the HP48 is not a good calculator. > All others are forgotten as the models change.... That's called progress. -- Bhuvanesh ==== >If You are looking to start a flame war Please come into ti territory: Indeed NOT... I am NOT looking to start any kind of war. Even though I like hp calculators... I am not a fanatic... I bought hp because I genuinely believed it was the best of the best..... I have had years of joy using it... I have NEVER had a hardware problem of any kind.....and there are STILL things I am discovering about it... even after owning it for 13 years !!!!!! you have given me a lot of good reasons to explore a TI89.... so my challenge was well met. I own both TI and Casio calculators which I have picked up over the years, in addition to my hp's.... the TI, I have is not a graphing model, just a plain basic solar powered scientific.... but I still like it for what it is.... I used it in exams when I was a student back in 1989 and the hp wasn't allowed in the exam I would be willing to buy another TI ... you advocating the TI89..... is that the best of TI ? ? I am sorry if you found my post insulting or inciting. ==== I need to adjust the display on my 48G. Can't find the manual, so can somebody pls tell me how to adjust brilliance and contrast? Any help much appreciated! Mads Odense, Denmark ==== Press and hold [ON] whiile pressing [+] for darker or [-] for a lighter display. >I need to adjust the display on my 48G. Can't find the manual, so can >somebody pls tell me how to adjust brilliance and contrast? Any help much appreciated! >Mads >Odense, Denmark > ==== Press and hold [ON] whiile pressing [+] for darker or [-] for a > lighter display. > Mange tak for det, Torstein :-) VH Mads ==== Try [ON]-[+] [ON]-[-] As I know, only contrast is adjustable. Ricks Madrid, Spain > I need to adjust the display on my 48G. Can't find the manual, so can > somebody pls tell me how to adjust brilliance and contrast? Any help much appreciated! > Mads > Odense, Denmark ==== There's a document at http://www.hpcalc.org/hp48/docs/misc/hp48image describing the way how to extract data from a real HP48 and put it into Emu48. Christoph Al Adrian schrieb im Newsbeitrag > Can you elaborate on how to use of the emulator for this purpose?... For example, if i wanted to create an exact duplicate of my calculator in > the emulator (emu48)...I'd... ?? And going the other way.. say if I had evaluated some particular software > and now wanted to download the emulator's setup to the calc...I'd... ?? > Al... > Use the Emulator! > (-: > PS: a port name :IO: will ARCHIEV & RESTORE through the serial > to your PC, but only RAM )-: > ==== I found out that you can send more than one file at a time just check them off, you have to keep clicking recieve on the pc for each file though. That's on emu48. Stan >What's the best way to back up the whole calculator to a computer. All >>ports and files and directories, in the most simplest way of course. I haven't found an efficient way to do it yet, but for port1 and port2 >I use the Connectivity Kit, that comes with Debug4x, in the PC and in >the calculator I use the Filer. In the file menu of the Connectivity Kit, I look for uploading to the >PC and then type the name of the file to receive. >I browse the port in the filer and when I'm in the file I want to >backup, I press XSEND (it's in the fourth page, pressing NEXT three >times.) Then just press OK in the PC. It's the best way I've found. Sadly it's still too slow. In fact I had >never backed-up anything from the ports, because those ports were >*safe*. As long as you don't play around with SysRPL or ASM! I had my >Sys/ASM programming projects in port1 (uses less energy for storing >continually) but the other day, a major crash during programming >erased half of port1 (the first bank), so I lost about 80Kb. I don't >remember everything I may have lost, but I'm sure I lost two almost >finished projects :(. Then I backed-up all my data, even the stuff in >port2. > ==== I have found a set of 4 NiCad batteries welded together properly for my HP-41 HP-IL based Thermal Printer (82162A)from Digi-Key. However I have not been able to find the plastic battery pack to hold the batteries and fit the same into the bottom of the printer. Does anyone know where I might be able to get an empty plastic shell? I was wondering if it is possible to connect the batteries to the printer without the plastic shell? I know duct tape etc won't look that great but it would do if I have no other option. I have some plastic sheet stock that I could tape the batteries to, Also does the battery pack for the printer listed above fit any other HP device? Harold A. Climer Dept. of Physics,Geology and Astronomy U. Tennessee at Chattanooga ==== > I have found a set of 4 NiCad batteries welded together properly for > my HP-41 HP-IL based Thermal Printer (82162A)from Digi-Key. However I > have not been able to find the plastic battery pack to hold the > batteries and fit the same into the bottom of the printer. Does anyone > know where I might be able to get an empty plastic shell? I was > wondering if it is possible to connect the batteries to the printer > without the plastic shell? I know duct tape etc won't look that great > but it would do if I have no other option. I have some plastic sheet > stock that I could tape the batteries to, Also does the battery pack > for the printer listed above fit any other HP device? > Harold A. Climer > Dept. of Physics,Geology and Astronomy > U. Tennessee at Chattanooga AFAIK the same battery pack is used in the HP-97. Monte ==== Just for the record there's a chap on eBay who sells the complete pack for $27 (New) Check out ... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3013713362&category=11713 > I have found a set of 4 NiCad batteries welded together properly for > my HP-41 HP-IL based Thermal Printer (82162A)from Digi-Key. However I > have not been able to find the plastic battery pack to hold the > batteries and fit the same into the bottom of the printer. Does anyone > know where I might be able to get an empty plastic shell? I was > wondering if it is possible to connect the batteries to the printer > without the plastic shell? I know duct tape etc won't look that great > but it would do if I have no other option. I have some plastic sheet > stock that I could tape the batteries to, Also does the battery pack > for the printer listed above fit any other HP device? > Harold A. Climer > Dept. of Physics,Geology and Astronomy > U. Tennessee at Chattanooga ==== I just got an HP-41 HP-IL based Thermal Printer (82162A) but it came with no battery pack. I was wondering if anyone knows the specs for the NiCads used in this printer? A colleague of mine has rebuilt several battery packs for several HP calculators and printers and says if I can get the specs. we should be able to fix something so as to get the printer working again. It looks almost brand new except for not having a battery pack. Harold A. Climer Physics/Astronomy Lab Instructor U. Tennessee At Chattanooga ==== use four Panasonic P-170 SCR (KR23/43) . Each off these has a capacity of 1700mAh at 1.2V . This type of battery suits perfectly into the cblack holder. Raymond Harold A. Climer schrieb im Newsbeitrag > I just got an HP-41 HP-IL based Thermal Printer (82162A) but it came > with no battery pack. I was wondering if anyone knows the specs for > the NiCads used in this printer? A colleague of mine has rebuilt > several battery packs for several HP calculators and printers and says > if I can get the specs. we should be able to fix something so as to > get the printer working again. It looks almost brand new except for > not having a battery pack. > Harold A. Climer > Physics/Astronomy Lab Instructor > U. Tennessee At Chattanooga ==== Better use the 2000 mAh Ni-Cad just available now. Raymond Del Tondo a .8ecrit dans le message use four Panasonic P-170 SCR (KR23/43) . > Each off these has a capacity of 1700mAh at 1.2V . This type of battery suits perfectly into the cblack holder. > Raymond Harold A. Climer schrieb im Newsbeitrag > I just got an HP-41 HP-IL based Thermal Printer (82162A) but it came > with no battery pack. I was wondering if anyone knows the specs for > the NiCads used in this printer? A colleague of mine has rebuilt > several battery packs for several HP calculators and printers and says > if I can get the specs. we should be able to fix something so as to > get the printer working again. It looks almost brand new except for > not having a battery pack. > Harold A. Climer > Physics/Astronomy Lab Instructor > U. Tennessee At Chattanooga ==== Have you got the ROM upgraded yet ? What about other communications between the calculator and PC... can you upload and download data ? What's the state of your calculator now ? WE WANT TO KNOW... we want to help just trying to figure out if you have a software problem or a hardware problem :) ==== When i have entered the following function,ABS(1-ln(x)),i think that my HP49G drew a wrong plot.Because x is allways over 0.Do it yourself. P.S a re patriotes apo ellada,ante na kanoume fun club. giannis student Greece ==== > When i have entered the following function,ABS(1-ln(x)),i think that my HP49G > drew a wrong plot.Because x is allways over 0.Do it yourself. Enable Rigorous mode on your '49. ==== I need to get a new HP. My current HP48GX started to fail (I get a reset almost every day, sometimes loose memory). Is there anything I can try to repair this calculator? Can the firmware be upgraded/reloaded ? If I can do nothing about it, is it possible to use it to learn its architecture? I work with microcontrollers and DSPs but never had the chance to 'play' with the HP architechture. It would be great if someone can share experience in the subject. I'm a newbie in this. Mariano ==== I get a reset >almost every day, sometimes loose memory). Is there anything I can try to >repair this calculator? First of all have you dowloaded programs into it.... there has been some talk about malicious code (hp48 virus ? ) that causes similar symptoms. If you are sure it's a hardware problem... you could open it up and have a detailed inspection... looking for any signs of corrosion or damage.... did you ever drop it ? or have a leaky battery ???? If there are no signs of physical causes... the next step would be a schematic and some electrical tests.... generally a signature analyser is used to troubleshoot microprocessor based systems... but to a large extent the usefulness of the measurements depends on knowing what the correct signatures are supposed to be.. so you would need this information..or else a good unit to compare it to. You could check out www.hpcalc.org.... but I don't know if they have logic diagrams or signatures Can the firmware be upgraded/reloaded ? It's in ROM... so the chip would have to be replaced... you might have to get another second hand or defective unit to use for parts... since availability of replacement items could be an issue If I can do nothing about it, is it possible to use it to learn its >architecture? I work with microcontrollers and DSPs but never had the chance >to 'play' with the HP architechture. There is lots of information available for programming the processor in assembly language... so you could certainly learn about it's architecture.... but before you could enjoy that you would still need to get any physical problems ironed out of the system. I have a little experience at reverse engineering digital systems.... but I have never had the time or need to do it on my wonderful hp hopefully somebody else has.. and can teach us both... or point us in the right direction just my $0.02 worth ==== >I need to get a new HP. My current HP48GX started to fail (I get a reset >almost every day, sometimes loose memory). Is there anything I can try to >repair this calculator? Can the firmware be upgraded/reloaded ? >If I can do nothing about it, is it possible to use it to learn its >architecture? I work with microcontrollers and DSPs but never had the chance >to 'play' with the HP architechture. It would be great if someone can share >experience in the subject. I'm a newbie in this. a used 48gx can be had for less than a hundred dollars. If you time is worth even ten bucks an hour, this is a much cheaper alternative to repairing your one one. ==== It has been a long while (years) since I do not download programs into my HP. I don't think I have a virus. I really cannot imagine how a virus can harm a ROMed HP. In flash, a virus may damage firmware, and it can even be protected, but in ROM, if you disconnect the battery for a long period of time, the HP should come back to its original state. now trace some points and test some stuff. Mainly to learn from it. I cannot test much of it from electrical point of view. The problem seems to be a software problem. It always happens when I am pressing a key or performing an operation. Do you think this can be tested electrically? I can trace addresses, data, check for activity, maybe get a reset output from the microprocessor. However, I am thinking of this: the calculator is RAM based, therefore all read/write information is stored in the memory. The OS must have a table with address pointers to variables, programs, folders, whatever. A hardware reset will reset the micro and will not alter RAM contents. If the micro/OS is capable to recover from a reset and yet recover the memory (Do you want to recover memory? YES / NO), then it should be able to locate tables, pointers and variables in RAM. I guess that, somehow, RAM contents are altered/corrupted. Can be due to: 1) its age (electrical components have a Mean Time Between Failure MTBF and will fail) or 2) a problem with firmware, and hence a problem with ROM contents, therefore ROM failure 3) a problem with the micro itself Now, since the micro has a reduced set of instructions, and use most of them during operation, I believe that if the failure is in the micro, it should be more often and specific. I bet the problem is in RAM/ROM. By the way, the self test performs OK. Other than that, my calc has been not been dropped, the batteries are fine, exposed to hot temperature in my bag, cold Michigan temperature in winter, lots of miles traveled, vibration, but nothing unusual. Does anybody have experience in opening an HP and testing this board? I can think of many do's but I would really appreaciate the don't's :-) Correct anything I have said if you think I'm wrong. Mariano ==== After reading what you have written... I would bet its the RAM. But consider this, unless you are tooled to remove the IC's... and can get replacement ones... or anonther calculator to butcher... what's the point of proceeding ? I agree with the guy who says get another one and be done with it. Thats what I would do, if I was in your position...... that's what I have done for other defective items I have owned that were far more expensive than hp calculator. Personally I cant be bothered with the hassle... I get pleasure out of USING the technology.. not repairing it. ==== I'm not intending to repair if it is too complicated. If it's related to hardware, it is almost imposible to repair. But anyway, I have a non working calc and still want to know what has failed. I get pleasure out of using technology, but also get pleasure out of learning from it. You are absolutely right to get a new calc. I'm looking for a HP49. I guess I am going to get more from a 49 rather than a 48. Mariano > After reading what you have written... I would bet its the RAM. But consider this, unless you are tooled to remove the IC's... and can get > replacement ones... or anonther calculator to butcher... what's the point of > proceeding ? I agree with the guy who says get another one and be done with it. Thats what I would do, if I was in your position...... that's what I have done > for other defective items I have owned that were far more expensive than hp > calculator. Personally I cant be bothered with the hassle... I get pleasure out of USING > the technology.. not repairing it. ==== Mariano, I was not REALLY able to help you... but you are quite welcome anyway :) About your NEW CALCULATOR.... I have BOTH an hp48 and an hp49 coming because I couldn't make up my mind... and I wanted to use a plug-in ROM which I like. However it seems from reading the posts that the hp49 is the better (more powerful) of the two.... better except for the quality of the keys and the placement of the enter key... thanks for posting in the forum and let us know how you like your new purchase when you get it ==== I was trying a few symbolic integration with my HP49G and this one didn't work sin(ln(x)) the answer should be 1/2 *x (sin(ln(x))-cos(ln(x))) (The IT89 was doing it easily!) ==== >I was trying a few symbolic integration with my HP49G >and this one didn't work sin(ln(x)) the answer should be 1/2 *x (sin(ln(x))-cos(ln(x))) >(The TI89 was doing it easily!) Yes, it can. It is done by IBP twice with the auxiliary function being simply X 'SIN(LN(X))' 'X' IBP yields 'X*SIN(LN(X))' '-COS(LN(X))' append another 'X and do another IBP which yields: 'X*SIN(LN(X))' '-X*COS(LN(X))' '-SIN(LN(X))' which means: 'SIN(LN(X))' = 'X*SIN(LN(X))' + '-X*COS(LN(X))' + '-SIN(LN(X))' Or, the solution is '(X*SIN(LN(X))-X*COS(LN(X)))/2' which simplifies to the answer you gave. ``Put on your thinking cap.'' Randolph J. Herber, herber@dcdrjh.fnal.gov, +1 630 840 2966, CD/CDFTF PK-149F, Mail Stop 318, Fermilab, Kirk & Pine Rds., PO Box 500, Batavia, IL 60510-0500, USA. (Speaking for myself and not for US, US DOE, FNAL nor URA.) (Product, trade, or service marks herein belong to their respective owners.) ==== >I was trying a few symbolic integration with my HP49G >and this one didn't work sin(ln(x)) the answer should be 1/2 *x (sin(ln(x))-cos(ln(x))) With a little calculus knowledge, the 49G can do it. Put this on the stack / X | | SIN(LN(X)) dX | / 0 Then do: LN(X)=U SUBST EVAL Then: U=LN(X) SUBST EVAL FACTOR And there you have it. -- Beto ==== I was trying a few symbolic integration with my HP49G and this one didn't work integrate (X/(1-X^4)^(1/2))dX . the answer is 1/2*sin^-1(X^2) . ==== >I was trying a few symbolic integration with my HP49G >and this one didn't work integrate (X/(1-X^4)^(1/2))dX . the answer is 1/2*sin^-1(X^2) . Yes it can... just do it as you'd do it on paper. Put this on the stack: / X | X | ------------- dX | (1-X^4)^(1/2) / 0 Then X^2=SIN(U) SUBST EVAL Then SIN(U)=X^2 SUBST And that's it. -- Beto ==== You kindly replied to this : >I was trying a few symbolic integration with my HP49G >and this one didn't work saying this : > Yes it can... just do it as you'd do it on paper. but I'm afraid that following your argument, the mentionned piece of paper can also integrate whatever you write on it... (slight exageration on my part, yes) The idea would be to have the answer out of the box, no ? As in single final answwer to a single request... Gerard ==== Nick (Hulk) starts longer (but not too long) explanation: Vedran, I suppose you used the built-in numeric solver because you said that you got the error Bad Guess(es). Well, bad news is that the numeric solver will *not* work with complex values. Good news is that you can enter your equation, SUBSTitute all knowns, enter the variable to solve for and use SOLVE to get a solution. What I didn't quite get: What do you mean with: > How can I solve the following? PI(symbol)/3.1415 ? What do you want to solve for here? Do you perhaps mean how to find a numeric answer of the ratio? If so, then ->NUM. End of transmission, Hulk goes working, Nick. > HP 49G uses (0,1) = i > Also, you have to state the multiplication, like > X*c= 1(2*pi*f*C*i), where pi is the symbolic pi. > Also you may find it easy enough to set some flags: > -2 SF => Constant -> Numeric > -105 SF => Approx. Mode > Ask more or wait John or Nick to give you a longer explanation... > Why doesn't this equation work? How can I make it work? Xc = 1/(2*3.1415*f*C*j) j = (0,1) [complex number j] f = 50 [real variable] c = 10E-9 [real variable] When I try to solve for Xc, I get Bad Guess(es) error message. How can I solve the following? PI(symbol)/3.1415 ? Calculator should show something close to 1 but it doesn't. It only shows > PI/3.1415. How can I fix that? > I now have received my new hp49G but when I connect to the PC with the connectivity software that I downloaded from the internet (v3Or4) GNU..... the SAME software that I have been using with the 48SX all these years. It goes through all the phases and the variables and directories appear in the calculator window.... BUT whenever I try to DOWNLOAD or UPLOAD a directory (or variable) I get: CFiler4x: Entry xxx (where xxx is the directory name) has unknown type 19. Directory. Please report this ! then this is followed by a window that states: xxx does not contain valid data or a valid program and the little hour-glass in the calculator disappears for good.... even though it still says Awaiting server commands... that's it.... finito.... no more communication until I exit and re-enter the software. Any body heard or seen this before ?????????????????? ==== > but when I connect to the PC with the connectivity software that I downloaded > from the internet (v3Or4) GNU..... the SAME software that I have been using > with the 48SX all these years. You will be better off with the Conn4x package (on HPCalc.org). It works with both calculators (48 and 49) using XModem links. If you develop SysRPL software on the PC, get the entire Debug4x package from HPCalc.org, it includes the connectivity package as well as a full development environment. Although this has been a shameless advert for the software I built (from Cyrilles great base), I think others might confirm what I have said. -- - - - - - - - - - - - - - - - - Bill Graves RKBA! bgraves@ix.netcom.com ==== I tried running the setup program and I got some error message regarding SIMP.HPP. I can look at and edit the file in Code Warrior, so if there's a way to change the file so it will work, I can do that. The error message caused it to cancel installation. I'm currently running Windows 98. Has anyone had this problem before? Does anyone know how to fix it? --CS ==== Speed schrieb im Newsbeitrag > I tried running the setup program and I got some error message > regarding SIMP.HPP. I can look at and edit the file in Code Warrior, > so if there's a way to change the file so it will work, I can do that. > The error message caused it to cancel installation. I'm currently running Windows 98. Has anyone had this problem before? Does anyone know how to fix it? > You could try it on a more stable operating system, like Windows NT, or Windows 2000 . I don't know if Win9x is even supported by Debug4x. Raymond ==== > I tried running the setup program and I got some error message > regarding SIMP.HPP. I can look at and edit the file in Code Warrior, > so if there's a way to change the file so it will work, I can do that. > The error message caused it to cancel installation. I'm currently running Windows 98. I just downloaded a copy from HPCalc.org and then installed with no problems at all on a Win98 SE machine that has never had Debug4x before. The install worked smooth as silk and I could load the Demo project. SIMP.HPP is a project file from C:Program FilesHewlett-PackardDebug4xExamplesSimple which gets copied during the install. Is it possible you have an old copy of the program? (then do Ctrl Panel add/remove and remove it). Do you have room left on your hard disk? (takes about 32 MB total)? I have received no other reports of failing to install and I do not know of anything that would fail under Win98. If none of the above help, I would uninstall (if you can), delete all the Debug4x.zip etc and go download a fresh copy. Perhaps there has been an error in the download? The author of Debug4x (based on excellent work by Cyrille, of course). -- - - - - - - - - - - - - - - - - Bill Graves RKBA! bgraves@ix.netcom.com ==== > SIMP.HPP is a project file from C:Program FilesHewlett- > PackardDebug4xExamplesSimple > which gets copied during the install. It was already there when I unzipped the file. > Is it possible you have an old copy of the program? (then do > Ctrl Panel add/remove and remove it). I don't think so, but I will check. I very recently lost everything on my hard drive, I think it used to be on there but I don't know if it is now. > Do you have room left on your hard disk? (takes about 32 MB total)? I don't know how much room I have (I'm at work right now) but I know I have a lot more than 32 MB left. > I have received no other reports of failing to install and I do not > know of anything that would fail under Win98. This is good because it means that the program was very well written. I'll have to admit, I was kind of hoping that someone else has had the same problem before. It would be a lot easier to solve. > Perhaps there has been an error in the download? This is a strong possibility. My connection at home is a dial-up. Is it also possible that Code Warrior is interfering with Debug4x? My machine thinks some of the Debug4x files are Code Warrior files. Is there anyway to just download the file that it doesn't like, and do you think that would help? I guess what I'm really asking is: Is this problem with that specific file, or that file type? > The author of Debug4x (based on excellent work by Cyrille, of course). I knew I recognized some of the names in the text files! This NG is cool. > Bill Graves RKBA! I could tell you what the exact error was. Sometime tonight, I'll write it down and post it. Maybe then we'll be able to get my PC's prespective on the whole thing (my computer misbehaves occasionally, I think it has a psychological disorder). --CS ==== > You could try it on a more stable operating system, > like Windows NT, or Windows 2000 . I've had Windows 2000 in my machine before, and ended up getting rid of it (a process that ended up with me wiping my hard drive clean). After the upgrade, a lot of my programs wouldn't install, and I couldn't find patches for a most of them. Since the upgrade also made my modem quit working, I could only look for patches after an extensive period of troubleshooting. Luckily, my wife's computer still worked, and I could download a patch for my modem. The multi-media functions on my keyboard will never work in win2k (according to HP). Needless to say, I will probably wait to upgrade to win2k. --CS ==== The decision to post this after my long silence about such things has two reasons. First reason is, I have already stated in the past that the shitty freedom fighters of the world, the usa government, will attack Irak no matter what Irak does. This just happened! The second reason is that particular naive people, who still believe that the usa is doing this for philanthropy and humanity. Ha! The biggest dictatorship of the world, accuses lands which look like amateurs in comparison to it. Bush, perhaps because of his complex (they misunderestimated me, what a clown!), had to do something to show us what a strong guy he is. Braaavo Bush! Do you have anything else to show us? The whole story, uncluding inspections, until now have proven two things: a) Sucking hot air about b and c weapons of Irak. The so called evidence was more a bad excuse for if we suppose that Irak has the weapons, then we must be right. The presented videos just show some guys working with barrels, some of them have masks, while a couple of steps away some other guys just take a walk happily in the middle of a so called c weapons industry. Oh yes, we also saw some old abandoned buildings which of course have to be b weapons production centers, just because the usa wants it so. In Greece we have thousands such buildings, would you please send some troups to bomb us? The amount of b and c weapons of Irak is extremely low taken for itself, and even lower compared to the destruction potential of the usa. Has anybody ever thought, to demand from the usa to destroy their weaponry, or else take the risk to be bombed? In the past I have received letters telling me that the usa has absolutely no b weapons and that the inspectors do control everything. And I should believe that the land where these things were first developed, has no usage for them? Ha! Not only the usa has such weapons but the investigations for making them better run at the highest levels. Even if this isn't true and the usa has no b and c weapons, I just don't see any difference between dying from an a bomb, from a b or from a c bomb. The destruction potential, be it of any kind, has nowhere/never reached the degree of the usa weaponry. *This* is one of the reasons why the usa feels, it is the cop of the universe. I'll stay at this point for a while and do exactly the same like what the usa did with Irak. I accuse the usa for possessing non-allowed weapons. Most of the usa people out there are upset and either tell me to go to hell, or keep on arguing that this isn't true. I continue the same tune, you do possess such weapons. And they continue the same excuses. You see what happens here? You for yourself, usa, behave like the Irak government and just tell me that you don't have such weapons, while you are *NOT ABLE TO PROVE THAT YOU DON'T POSSESS SUCH B AND C WEAPONRY*. If it isn't obvious to you, then consider that it is mathematically impossible to prove that you *don't* possess something. But exactly this is what your clown of a president demands from the Irak. So, accepting your own politics, should I say: USA, you either destroy your mass destruction weapon within a month, or the world will bomb you!. What do you think? Do you find that funny? I also received letters, telling me that the usa might have so much military power but it isn't a dictatorship and it wants freedom for everybody. Well, I'll tell you what I think. When I see that there are even worse dictatorships on this world, which the usa doesn't even talk about (China for example), I realize how much the usa wants freedom for everybody. Israel has ignored uno resolutions since decades, but the usa never mentioned any plans to attack that country. If a dictatorship dances to your song, then you smile and let it be. If a dictatorship does things against your interests, you wipe it out. THIS IS YOUR REAL ATTITUDE COWARDS OF THE WHITE HOUSE!! You don't even think about droping a single bullet over Peking, because you shit in your pants when you think about what the chinese answer could be! Exactly what you did in the past, when you only heard the two words: Red Army! Where were your interest for human rights when the massacres in Tibet took place? When the genocides in Armenia and Curdistan took place? When the greek citizens were tortured to death from the dictatorship that you brought to power supported for years? You don't want freedom for the nations, pretenders and betrayers, you want everybody to obey your rules, that's all! Or else, you would have attacked the USSR exactly like you attack Irak now. But, ha! The USSR would presumably dustify you, and cowards never attack when they know that they will lose! b) The whole theatre of inspections was only for the eyes of the world, a comedy perfectly put in scene by the politicians of the white house. If the usa would attack one the way or the other, what was the use of the whole shitty comedy? Why did your president even participated the uno discussions? If the attack would happen, regardless non-existing evidence and regardless what the uno says, what are you, usa, doing at the uno? You could just pack it up and go, there's no reason to be there if you discuss only when others accept what you say. George W. Bush has started his war. Bravo again! What an achievement! He wants to remove Hussein, and put just another dictator to his place. But a good dictator this time, a guy which will co-operate to secure the oil interests of the usa in Irak. The same general against whom the accusations exist, that he ordered the usage of c weapons in the past! The betrayers and cretins of the white house show their real faces here. This was the second part of my first prediction, which stated that the dictatorship will not be removed. We will have a Hussein under a different name, that's all. Now I make another prediction, which you, usa-friendly guys out there, will also ignore just as you ignored the first, pretending that nobody has told that and covering this unfair story in silence: IRAK IS NOT THE END. AFTER IRAK THE SAME US IMPERIAL POLITICS WILL BE CONTINUED. NEXT ONE COMES PAKISTAN OR IRAN. THE WHOLE WORLD IS WHAT THE USA WANTS. YOU ARE THE DARK SIDE OF POWER. Bush's one and only message all this time was, more or less, there must not be anything else besides America. Alone the usage of the name America for what should be called usa, is in its essence the result of the arrogance of those who consider the 300 (or was it 400?) years of history of this land as the only existing culture. (Let it be said here: usa is NOT America. America is a whole continent with too many other lands and cultures, which the brain of your miserable president isn't able to grasp.) The total ignorance of non-usa interests and the egoistic behavior is obvious: 1) Disprove any decision that banns atomic bomb tests 2) Not accepting the international criminal court 3) Not accepting the Kyoto Protocoll 4) DENYING TO ACCEPT THE B WEAPONS CONVENTIONS - Now, what an irony, and you tell me that the usa wants to disarm a threatening country! Should I continue? I think the above, especially point four is enough to make the usa government turn red in shame. If it isn't, then the usa government consists of people, whose capability to tell right from wrong has been blasted out of theit heads. At the same time those weaker lands that don't want to obey the criminal commands of the us, are targets for boycotting. The usa put anybody under pressure that dares say no. What a love for freedom they demonstrate here, really admirable! Even in your own dictatoric country, citizens of the usa, the tactics of covering critics is now active! Even the Dixie Chicks were wiped out of the lists of radio stations after they expressed their dislike for what Bush started. What a manifestation of democracy! People like Clooney or Hoffman or Newman are impossible to hide of course, but for the time being anything possible is done, to prevent them from protesting in public! The land of the free is in reality the land of the slaves! As long as what you want is what the us government wants, you are allowed to be free. This is the freedom of a prisoner, who can go where (s)he wants *INSIDE HIS PRISON*! The pluralism of opinions in the media in the usa was replaced pretty fast by the uni-sono hymnes to the freedom loving land, which is the biggest threat in our world since nazi germany. Actually the us is even worse, because it *does* have the potential to destroy the whole world. Those who pretend to love and promote freedom were the same who ordered espionage of our offices in Germany, France and some other countries. (ECHELON you know??) The freedom warriors violenced all rules. They flew in turkish territory *BEFORE ANY AGREEMENT FROM THE TURKISH GOVERNMENT*! You aleays take what you want, don't you??? The freedom warriors ordered a greek plane that was patrolling inside greek air territory to return to its base or else it would be shot! Over my country you give me commands? Is that your definition of freedom? Remove everybody who stands on your way? Even if the way is not in your territory? I wish, I really wish I had means to pay that back to you, yunkees! When the cold war stopped I had the miserable feeling which I couldn't explain. Now I know what it was. At least at that times there was a power which could show you the stop sign. Only the name USSR was enough to give you one month's nightmares. Now, unfortunately, that power doesn't exist. So, usa, you take the right to decide for the whole world, just because you have the power. And this is one of the main differences to Europe. In Europe we believe in the power of right. You, usa, believe in the right of power. Usa government, cowboys you were born, and cowboys you will die. You will make no progress until someone else gets even more powerful and blast you out of your offices, out of the uno, out of the world! Another way you don't understand. Oh no, this time there will be no remorse! I will NOT apologize for protesting against the usa tyranny. I'll keep HULKing anybody who still has the face to answer this, saying that the usa is right! AND I'll keep posting to this group each and every case of the usa ignoring international right. You got me green, now run for cover! Blasting the columns of truth to everybody! Until you bomb me to keep me silent! Nick Banner, alias the HULK! ==== X > Blasting the columns of truth to everybody! But we knew all this already! > Until you bomb me to keep me silent! Didn't you already got some radiation from a gamma.bomb, Bruce? > Nick Banner, alias the HULK! Yes, but what has this to do with calculators? There must be a i.hate.bush or similar NG somewhere... Veli-Pekka PS: I hope that war is over soon and that the Burning Bush pumps massive amounts of oil to boost the economics. ==== > Folks: I'm trying to enter a complex number in polar form - you know, magnitude, > then the angle buttons, then the angle. I can enter a numeric quantity of > degrees fine, but when I try to enter something like pi/2 it stops me right > at pi with an error about invalid syntax or something. I've looked through > both the owner's manual and quick start guide and find nothing. Any clues? Just enter it as: '(r, [If this has been discussed here before, please point me to it. Thanx.] The HP49G sometimes gives incorrect answers when ->NUM performed on ratios of > large integers. In the following examples, exact mode is assumed. It seems that the HP49G has only 12 digit internal accuracy because when inputting such large integers, it rounds the input to 12 significant digits. > ========== Example #1 ========== 1000000000001/1000000000002 (eleven zeros in each) ->NUM yields 1. But the correct answer (rounded to 12 decimal places) is 0.999999999999 Admittedly, that's only off by 1 in the last place, but I thought the HP49G > had the ability to always get simple divisions correct to the last digit. It appears that HP it reads the division as 1000000000000/1000000000000 instead of 1000000000001/1000000000002 because any numbers after 12 digits are considered to be zero. With a Ti89, it gets 0.999999999999 because it uses internal 14 digits precision; this eliminates rounding errors in numerics. Sometimes I see that my results are a little off in the last decimal place when checking my work compared to my original answer. So use the last digit with care, a guide to what the value actually might be. > ========== Example #2 ========== 199999999999499/199999999999500 (eleven 9's in each) ->NUM yields .999999999995 But the correct answer (rounded to 12 decimal places) is 1. That's *five* off in the last place. Not good. In this case the HP reads it as 199999999999000/200000000000000. That's why it is good not to round with significant digit calculations until the very end (when doing by hand) because errors like these might arise. The HP calculator, however, can only do twelve digit calculations internally, so it has to read all input with only the first 12 digits, after that it's zero. It would be good if HP added an extra internal digit or two in calculations, it would make the last decimal place reliable. I am unsure what the limitation was that this could not be done, but it's ok. You can always get the longfloat library at hpcalc. Albert ==== > [If this has been discussed here before, please point me to it. Thanx.] The HP49G sometimes gives incorrect answers when ->NUM performed on ratios of > large integers. In the following examples, exact mode is assumed. > Is the problem that the integers are converted to reals before performing the > division? If so, is there an easy way to obtain accurate ratios of large > integers on the HP49G? > I don't think there are any easy way, as most integers functions are converted to reals by automatic dispatch mechanism. However, you could carry out the division in fixed point, i.e. something like this: /<< 15 ALOG ROT OVER * PICK3 IDIV2 4 ROLL /->NUM / + SWAP / />> It passes your 3 tests, but needs to be tested ( thought over) properly. It seems a bit of a kludge. I think there is also some more elegant possibilities with residual aritmetic using floating division and a suitable prime(s). There is something in Knuths semi-numerical book. Maybe someone could check it. Gjermund ==== X > It appears that HP it reads the division as 1000000000000/1000000000000 > instead of 1000000000001/1000000000002 because any numbers after 12 digits > are considered to be zero. With a Ti89, it gets 0.999999999999 because it > uses internal 14 digits precision; this eliminates rounding errors in > numerics. X > It would be good if HP added an extra internal digit or two in calculations, > it would make the last decimal place reliable. I am unsure what the > limitation was that this could not be done, but it's ok. You can always get > the longfloat library at hpcalc. Albert BUT...how is this possible? I thought that the HP OS has internal 15digit accuracy in it's calculations (even more when you do some internal matrix calculations) Why this is not used here is beyound my imagination. NO it is not! If I use SysRPL I get good answers. That means that in User RPL the coversion gives you *every* intermediate answer in 12 digits and then these are used in subsequential calculations, like it always used to do. What people want here seems to be like asking the ->NUM to start a small SysRPL de/compile project to get enhanced precision for the output. Not a bad idea at all! Go long-reals go! ==== in hpcalc.org in my 49g, using the same method that I use to normally update the ROM of the 49. But when (I suppose) the process was about to to finish, he appeared in the screen of my 49 a message that said a bank had to be erased, that I went to the Erase Banks menu, as soon as I returned to the previous menu and that I chose Download Pack to finish the transference. I went to this menu and I erased bank 0 (I did not dare to erase nothing else), but continues appearing the happy message and I cannot install the ROM of the 39/40 in my 49g. I could not make another thing, then I installed the normal ROM of the 49, process in which I did not have any problem in concluding it. Some of you has tried to do this successfully?. You have managed to install the ROM of 39/40g in the 49g?. Hopefully you can help me in this. Sorry for my ---horrible--- english. Greetings from Valparaiso - Chile ==== > in hpcalc.org in my 49g, using the same method that I use to normally > update the ROM of the 49. But when (I suppose) the process was about > to to finish, he appeared in the screen of my 49 a message that said > a bank had to be erased, that I went to the Erase Banks menu, as As the message said, you need to erase an EXTRA bank in the HP49. The HP39G is using one more bank of 128KB than the HP49. So go into the Erase bank menu and select the first user bank and format it. Then download as usual. ==== > in hpcalc.org in my 49g, using the same method that I use to normally > update the ROM of the 49. But when (I suppose) the process was about > to to finish, he appeared in the screen of my 49 a message that said > a bank had to be erased, that I went to the Erase Banks menu, as As the message said, you need to erase an EXTRA bank in the HP49. The HP39G > is using one more bank of 128KB than the HP49. > So go into the Erase bank menu and select the first user bank and format > it. Then download as usual. > thanks, problem [SOLVE]d ==== 39g: $40 49g: $190 About 5 of each. Martin Cohen ==== I have an old HP41cv, it works just fine, but I have problems with the battery pack. Is there a solution to exchange the battery pack with some more normal batteries or something like it? Please help, I don't want to lose the calc. Have a nice day and thanks for answers:) Borut Korpar borut.korpar@uni-mb.si ==== Note that you have now the 450mAh NI-MH to put in the normal batterie pack (without the recharging inside). b4tbf2$7ct$1@planja.arnes.si... I have an old HP41cv, it works just fine, but I have problems with the > battery pack. Is there a solution to exchange the battery pack with some > more normal batteries or something like it? Please help, I don't want to lose the calc. Have a nice day and thanks for answers:) Borut Korpar > borut.korpar@uni-mb.si ==== If you still have the original batery cover you can use four (4) N size disposable batteries in the 41C/CV/CX. If you do not use an energy hungry peripheral, like a card reader, they should last a few months. These N size are also called half AA size in some places. The standard battery holder shows the correct orientation for each cell. More information at: Good luck. Jean (Johnny) Lemire from Richelieu, Quebec, Canada. ==== In a recent thread Joe pointed out the lack of a LASTX command on the 48 and 49. I forget where I got this, so the author goes unsung, but it provides LASTX for either calculator: << DEPTH -> N << LASTARG DEPTH N - DUP -> S << ROLLD S 1 - DROPN >>> Sorry it's not a proper transfer, but I don't have my cable handy. Bill ==== > I forget where I got this, so the author goes unsung... It's by Darryl Okahata, and is available as 'LASTX' on Goodies Disk #3. -Joe- ==== > In a recent thread Joe pointed out the lack of a LASTX command on the > 48 and 49. I forget where I got this, so the author goes unsung, but > it provides LASTX for either calculator: << DEPTH -> N << LASTARG DEPTH N - DUP -> S << ROLLD S 1 - DROPN >> > Sorry it's not a proper transfer, but I don't have my cable handy. Well, but if you run this program then you replace the last arguments with whatever the argument to DROPN was, so if you run it twice, you'll very likely get a different result the second time, unlike the LASTX command on a classic RPN calculator. Try the following; note that it restores whatever was the most recent object in the last arguments buffer back to the last arguments buffer. It places whatever was the level 1 argument for the last command that took any arguments on level 1. Note that it doesn't restore what was on level 1 before commands that don't take any arguments, like CLEAR, DEPTH, STD, MEM, and so on. If flag -55 is set (last arguments disabled), then it errors out. If flag -55 is clear but the last argument buffer is empty, then it puts nothing on the stack and leaves the last arguments buffer empty. Would it be better if in the case that the last arguments buffer is empty, then it would put the number 0 both on the stack and in the last arguments buffer? Checksum: # D527h Bytes: 97 << DEPTH -> d << LASTARG DEPTH d - IF DUP THEN DUP2 2 + ROLLD DROPN DUP DROP ELSE DROP -55 DUP SF CF END >> >> Awfully big for something that seems so simple, but I think that it better duplicates the classic RPN LASTX, except with the difference that RPL calculators can have *nothing* in the last arguments buffer. But this reminds me of another difference that I'm not sure that anyone mentioned. On a classic RPN calculator, the 4 levels of the stack and the LAST X register are always present and always have *something* in them; even after a reset they each have the value 0. Not so with the RPL calculators. -- James ==== PS: Here's a version that puts the number 0 on the stack and leaves the last arguments buffer empty in the event that last arguments was empty: Checksum: # F5Dh Bytes: 94.5 << DEPTH -> d << LASTARG DEPTH d - IF DUP THEN DUP2 2 + ROLLD DROPN DUP DROP ELSE -55 DUP SF CF END >> >> -- James ==== James! Are you sure that the users flag status is preserved? What if it was -55 SF at the beginning? Why not use PUSH & POP? << DEPTH -> d << LASTARG DEPTH d - IF DUP THEN DUP2 2 + ROLLD DROPN DUP DROP ELSE -55 DUP SF CF END >> >> ==== > James! > Are you sure that the users flag status is preserved? I regard leaving any flag, mode, or the current directory changed after the program ends to be very poor practice (or amazing arrogance), unless the program is specifically intended to do so. An exception would be if a warmstart were done while the program is executing. A possible exception (which is just barely possible in this program) would be if CANCEL were pressed while the program is executing. Do you really expect that I'd overlook such a thing in this program? > What if it was -55 SF at the beginning? Then the program errors out at the LASTARG command, before the SF and CF commands, and the flags and stack are left as they were. > Why not use PUSH & POP? They're not needed in this case. Yet another variation follows below. << DEPTH -> d > << LASTARG DEPTH d - > IF > DUP > THEN > DUP2 2 + ROLLD DROPN DUP DROP > ELSE > -55 DUP SF CF > END > >> >> In the following, if the last arguments buffer is empty, then the real number 0 is put both on the stack and in the last arguments buffer. Note that on a classic RPN calculator, the Last X register can never be truly empty; even after resetting continuous memory, it contains the value of 0 (or 0h in the case of my 16C). Checksum: # ECA9h Bytes: 69 << DEPTH -> d << LASTARG DEPTH d - IF DUP THEN DUP2 2 + ROLLD DROPN END DUP DROP >> >> -- James ==== PS: The checksums that I listed in this thread are for the 48 series; they're different for a 49G. Also note that on a 49G, the numbers in the programs should be entered as reals (with a . appended). With the following modifications, the programs should work on a 28 series, but note that I haven't tested them on a 28. Change LASTARG to LAST and change -55 DUP SF CF to 31 DUP CF SF. -- James ==== Try the following; note that it restores whatever was the most recent > object in the last arguments buffer back to the last arguments buffer. Bill ==== Is that also working in ALL the models (including 28) the same way? If so, great work, Mr. Bond! X > In the following, if the last arguments buffer is empty, then the real > number 0 is put both on the stack and in the last arguments buffer. Note that on a classic RPN calculator, the Last X register can never be > truly empty; even after resetting continuous memory, it contains the > value of 0 (or 0h in the case of my 16C). Checksum: # ECA9h > Bytes: 69 << > DEPTH -> d > << > LASTARG DEPTH d - > IF > DUP > THEN > DUP2 2 + ROLLD DROPN > END > DUP DROP > > >> ==== What is the difference between a hp49g+ and the hp49g and who sells the ==== as far as i know, there is only one HP49G model produced. ==== > What is the difference between a hp49g+ and the hp49g and who sells the Hmmm! As far as I know the model with a + is the HP48G+ as opposed to the HP48G. The + model has 128KB memory instead of only 32B. !Demeter! ==== www.cynox.de HPSpeed1, Double Speed Module for HP48G/GX and HP49G, 30.00 EUR, which is currently installed on my (other) HP 49G, which I may sometimes refer as HP 49G+ - or whatever > What is the difference between a hp49g+ and the hp49g and who sells the ==== > What is the difference between a hp49g+ and the hp49g and who sells the hp49g+? check the number well... I donÇt know if it exist! basically hp48 (forty eight) G : 32kb RAM G+ : 128 kb RAM GX : 128 kb RAM + 2 expansion ports for more RAM (up to 4 MB) or sofware cards. ==== Somewhere I read a method of pausing what one was doing and then opening a new session For example, working on some program development, and want to go to some simple calculations. You can pause this part and move off do your calculationbs and then come back. Aubrey. ==== 1) HALT 1B) *not really needed* CLEAR 2) do you calculations 2B) *if needed* store the answer(s) into a variable(s) 3) CONT (or press shift-ON for CONT) 4) *if you did CLEAR * UNDO Note: While I just tested the above sequence, you can do a lot of variations of it. Every new HALT opens up a new environment stacked. So, if your little sister comes in (without knocking on the door) and has a simple school math problem, you may start a new environment AND if you friend phones you while you are at point 2) with your baby sister and asks you to solve some problem, you may start yet another environment > Somewhere I read a method of pausing what one was doing and then > opening a new session > For example, working on some program development, and want to go to > some simple calculations. You can pause this part and move off do your > calculationbs and then come back. Aubrey. 1. Can I change the hp49g from rect to polar mode with just one (or two) keystrokes ? 2. when in RPN mode, is there shortcut keystrokes for DROP and SWAP ==== m> 1. Can I change the hp49g from rect to polar mode with just one (or two) m> keystrokes ? Get KEYMAN, this is one of the optional assignments it provides, under the More button (read the docs...) m> 2. when in RPN mode, is there shortcut keystrokes for DROP and SWAP DROP is BACKSPACE, and SWAP is the right arrow. - Carsten ==== > 1. Can I change the hp49g from rect to polar mode with just one (or two) > keystrokes ? You have to assign a small program to a key. If you assign this to the [SYMB] key you need only 1 keystroke << -16 DUP IF FS THEN CF ELSE SF > 2. when in RPN mode, is there shortcut keystrokes for DROP and SWAP The [<=] Backspace key acts as DROP and the [ |> ] cursor right is SWAP I think this is as it always has been ==== does someone have any information about the HP71 survey module (HP 82494). I could not find any on the HP museumsÇ DVD. Perhaps someone knows a trick to override the file protection. If I could read the files I could make a manual myself :) Stefan ==== I would like to print from a Palm Pilot (Handspring, Clie, etc...) to the HP infra red printer... does anyone know of any resources that would help educate me? I am writing a weight and balance program for a small airline. The pilots can print out the results while on intermediate legs of a journey. The 48GX has enough RAM, but is slowly disappearing. The printers are quite rugged, and seem a good match for this application. Royce ==== I didn't mean to sound as harsh as I did. I'm glad you now know how to use the NG. Again, my apologies if I was too strident with you.... Rod > YOu are all right. I did not know how to use this correctly. I feel > dumb for suggesting, but at least I now know how to do it. ==== > within a minute or less (sometimes it varies). Browsing through messages is Of course the messages you posted on your local usenet server are going to appear very quickly. The problem is for the messages to show up on other servers, that may take a while In any case, I strongly prefer a usenet based forum as I can organize the message the way I want, save the message or flag them if I need to. I also like the ability black-list people that post nothing useful or off-topic. In any case, I believe the original poster of this thread was a throll that was just advertising is own product ==== > Yes! I like that ability as well, and the option of simply opening the > Usenet reader than going to a web site, logging in, and browsing messages > through a slower html interface (since pages have to load). My favorite is tin. -- Wayne Brown | When your tail's in a crack, you improvise fwbrown@bellsouth.net | if you're good enough. Otherwise you give | your pelt to the trapper. e^(i*pi) = -1 -- Euler | -- John Myers Myers, Silverlock ==== I am really happy today.Can you imagine why?For a year i am trying to find greek users of HP calculotors.I have bought my HP49G last year when i had finished the second class of high school,here in athens.I am really impressed by the capabilities of my HP.But don't you think that here in athens HP calc's are expensive? Giannis Pallis student. p.s Bravo to N.Karagiorglou for his marathons.(I still do not know all the things you are writing about but i am trying) ==== > I am really happy today.Can you imagine why?For a year i am > trying > to find greek users of HP calculotors.I have bought my HP49G last year > when i > had finished the second class of high school,here in athens.I am > really impressed by the capabilities of my HP.But don't you think that > here in athens > HP calc's are expensive? > Giannis Pallis > student. > p.s Bravo to N.Karagiorglou for his marathons.(I still do not know all > the things you are writing about but i am trying) The impossible name striked again, it's Karagiaouroglou but I guess even copy-paste can't work with that string ;-) Greetings and thanks a lot, Nick. ==== Have you read the other messages in the thread? -- Thierry Morissette thm47@msn.com > How about this for rumors: > http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/forum.cgi?read=29158 > X > 2) We've accelerated our product development plans and begun working with > our new aggressive sales and marketing partners around the world. can > mean > ABSOLUTELY anything or nothing. Plans are plans, and he only talks about > SALES AND MARKETING, not actual R&D. > X ==== The HP 9s and HP 9g are just the beginning of what we have in store for > our customers throughout the coming year, said Fred Valdez, general [...] > aggressive sales and marketing partners around the world. Is it just me, or are they bluntly threatening us? :) -- ee4299 at ee dot teiath dot gr ==== I would say that you can always buy a TI.... Do you need a better reason to buy an HP? Caspar Mariano schreef in bericht In ten years of extensive use, my HP48GX is starting to fail. I get a reset > almost every day, and the memory is lost. It is not the battery and I'm not > using any card, sometimes it just hungs up and performs a 'soft reset' as > pressing ON-C, but sometimes I get the annoying hard reset, and I loose all > memory. I guess it is time to upgrade to a new HP49, but you know that the future of > HP calculator is uncertain. I am considering maybe going for a TI, but have > no experience with such calculators. Can anyone with experience in both HP > and TI tell me what are the advantages and drawbacks of each? I want to go > for an HP, but I guess the future of TI is better. Can anyone give me a good > reason why I should not go for a TI? Mariano ==== > In ten years of extensive use, my HP48GX is starting to fail. Can anyone give me a good > reason why I should not go for a TI? > Well, the TI may also give you ten years of extensive use, but??? I am of the opinion that if you have to ask, buy TI. The Ti-89 is TI's latest (actually the V-200 is, but both are about equal). My own opinion is that you would be best served by another Hp48GX. ==== Basing your decision on whether HP will be supporting calculators in the near future is not a solid one, mainly because the existing database of software for the HP48-49 is literally huge. If you are afraid that you may need service for your calc then buy two of them! TIs are good but HPs are better!! :-) Nice and silly, eh? Well, you picked the wrong subject and newsgroup to ask such a question. You should know better! !Demeter! ==== I am a highschool student. I have a ti-89 and a hp49. The ti-89 has better hardware in almost every way except for memory (it still has plenty). The speed is one major advantage of the ti-89. I dont do any of my graphing on the hp. I think that they are about equal in math capability, but I prefer the CAS of the 89. The lack of RPN slows you down a little when doing numerical calculation, but it speeds you up when using the CAS. Consider for example solving an equation. on 89: solve(3x+2y=2z,x) on 49: 3x * 2y * + 2z * = x SOLVE it is more keystrokes becouse it interpretes 2x as 2 SPC x instead of 2(x) I wish that it would interpret it as 2(x) and then it would be quicker. In conclusion, I think the only disadvantages of the 89 are the lack of RPN and soft menues. And the lack of RPN is not that bad. It is nice to be able to look at the answer and what you typed in at the same time so you can insure that you no typos. I would recommend the ti-89 over the hp-49. ==== Someone has written a document about this very thing: http://www.hpcalc.org/details.php?id=4738 I prefer HP over TI mainly because I like the community better. I have visited TI's in school (whether or not it sould be allowed) and people making requests for games. I also browsed through their programs, not much besides games. I found a place with downloadable applications on the official TI website, but the only useful ones weren't free. The biggest complaint people seem to have about the HP49 is the lack of good documantation. This NG has taught me more about my calculator than any calculator Urroz, that has also taught me a lot about my calculator. The next biggest complaint is the keys, but they soften upover time, and you get used to the extra stiffness. The only complaint that I haven't found a way around is the whole graphing issue. My HP definitely takes a LONG time to graph. On the other side of that, I've seen the TI89 take a comparitively huge amount of time to solve equations numerically, and evaluate integrals. I guess it really depends on what you are doing with your calculator. RPN is also a pretty big selling point. My $0.02. --CS ==== Get a 48GX while you still can. In ten years of extensive use, my HP48GX is starting to fail. I get a reset > almost every day, and the memory is lost. It is not the battery and I'm not > using any card, sometimes it just hungs up and performs a 'soft reset' as > pressing ON-C, but sometimes I get the annoying hard reset, and I loose all > memory. I guess it is time to upgrade to a new HP49, but you know that the future of > HP calculator is uncertain. I am considering maybe going for a TI, but have > no experience with such calculators. Can anyone with experience in both HP > and TI tell me what are the advantages and drawbacks of each? I want to go > for an HP, but I guess the future of TI is better. Can anyone give me a good > reason why I should not go for a TI? Mariano ==== X > on 89: solve(3x+2y=2z,x) > on 49: 3x * 2y * + 2z * = x SOLVE > it is more keystrokes becouse it interpretes 2x as 2 SPC x instead > of 2(x) > I wish that it would interpret it as 2(x) and then it would be > quicker. Have you tried it in the EQW Environment? The multiplications are filled in automatically although I have to press [ALPHA] before Y and Z ==== I thought that TI has gone further with its latest TI-89, but seems that the capabilities are still the same as the HP. I work often with MATLAB and was expecting to get a new calculator with some more power, closer to MATLAB. Since both calculators seem not to have major breakthroughs, I guess I'll get another HP. I'll remain with the HP48GX. I don't like the idea of unreliable keys (my HP is ten years old and the keys are in excellent shape). I guess the HP49G has a renewed GUI, more memory and some more stuff. But I am looking for more than just a nice GUI: more power and speed. And I see that it hasn't changed much from HP48 to HP49, I'll try to get a new HP48GX. Mariano In ten years of extensive use, my HP48GX is starting to fail. I get a reset > almost every day, and the memory is lost. It is not the battery and I'm not > using any card, sometimes it just hungs up and performs a 'soft reset' as > pressing ON-C, but sometimes I get the annoying hard reset, and I loose all > memory. I guess it is time to upgrade to a new HP49, but you know that the future of > HP calculator is uncertain. I am considering maybe going for a TI, but have > no experience with such calculators. Can anyone with experience in both HP > and TI tell me what are the advantages and drawbacks of each? I want to go > for an HP, but I guess the future of TI is better. Can anyone give me a good > reason why I should not go for a TI? Mariano ==== > I also browsed through their programs, not much besides games. I found a > place with downloadable applications on the official TI website, but the only > useful ones weren't free. I assume you know about these sites for the TI's? http://www.angelfire.com/realm/ti_tiplist/ http://tiger.towson.edu/~bbhatt1/ti/beta/MPL.htm http://triton.towson.edu/users/bbhatt1/ti/MathTools.htm -- Bhuvanesh ==== >The Ti-89 is TI's latest (actually the V-200 is, but both are about equal). but one should not forget, that the V-200 is nothing other, than an TI-92 plus with a new design, some new keys, an a new user-interface. Volker ==== I have tried EQW but I dont like it. And EQW is not rpn. Besides, the 89 has an EQW too so it is not a factor. I did not complain about the ALPHA becouse the keys can be set to whatever is wanted. Now that I think about it, I like the menues of both calculators. The 89 has sort of a combination of soft menues and drop downs. f1-f6 select the menue and then have a drop down. This is faster when alternating between several menues. This works similar to the way windows programs work (File Edit View etc.). I still recommend the 89 over the 49 for symbolics. And for numerics I recommend both the 89 and hp48 over the 49 becouse of the bad keys. This is why I just bought myself a hp48. I will use the 48 for numeric calculations and when CAS's are banned and the 89 for the CAS. I suspect that I might retire my hp49. > X > on 89: solve(3x+2y=2z,x) > on 49: 3x * 2y * + 2z * = x SOLVE > it is more keystrokes becouse it interpretes 2x as 2 SPC x instead > of 2(x) > I wish that it would interpret it as 2(x) and then it would be > quicker. > Have you tried it in the EQW Environment? > The multiplications are filled in automatically > although I have to press [ALPHA] before Y and Z ==== >I assume you know about these sites for the TI's? http://www.angelfire.com/realm/ti_tiplist/ >http://tiger.towson.edu/~bbhatt1/ti/beta/MPL.htm >http://triton.towson.edu/users/bbhatt1/ti/MathTools.htm No! They even have a program for RPN that doesn't appear to be in French. I'll starting telling TI users about this site after Spring Break. A lot of them wil be happy to have good sources for TI programs. --CS ==== >The only complaint that I haven't found a way around is the whole graphing >issue. >My HP definitely takes a LONG time to graph. Have you tried lowering the resolution using the RES command? -- Beto ==== >> The HP 48 GX has none of the above features. But it has much more >> memory, it has graphic capabilities (the HP 41 don't) and it can solve >> task symbolically (the HP 41 can't). >So, basically: >1) The best number cruncher=HP 41 [42] I agree, if the main task is solving speial numerical problems that occur on and on and it is not necessary to take a formula and solve to _another_ variable. >2) The best symbolic graphics calc= HP 48 [49]? >PS: I use the 41CX as a clock to wake me up and remainder for TV-shows Isn't the 48 loud enogh? SCNR Volker ==== X >PS: I use the 41CX as a clock to wake me up and remainder for TV-shows > Isn't the 48 loud enogh? SCNR The poor 48 series can not run a programmable alarm as a subprogram So if I'm currently using the 48GX for number-crunching the prgram just passes by as a label instead of executing the program: there is no [up-arrow][up-arrow]label operation possibility in alarm system. ==== >The poor 48 series can not run a programmable alarm as a subprogram >So if I'm currently using the 48GX for number-crunching the prgram just >passesby as a label instead of executing the program: there is no >[up-arrow][up-arrow]label operation possibility in alarm system. Ahh. Sorry, but i don't use my HP 48 as an alarm clock very often. So i didn't know about this fact. Volker ==== > I owned a '41 from when they first came out - they really were waaaay ahead > of their time. straight-forward/no nonesence - In comparison I've struggled badly with > the HP49g - too darned complicated. If anyone from HP is reading this, what I'd love to see is a HP41 'Millenium > Edition' ... ... something with the power & simplicity of the 41 - but with the speed and > additional memory of modern technology - and REAL KEYS! I'd buy one in a moment - no matter what the cost! Mmmmm... An HP41 with >1Mb RAM... a display that shows the complete stack, plus some registers... USB instead of HPIL, but with a line of accessories to go with it such as barcode scanners, data collection gear etc ... the same simple HP41 language, but with every extension module ever developed in ROM... maybe a few PDA-type applications -- diary, address book, text editor, to-do list... simple graphics display... an XScale CPU... Yep. I'd love one. But it'll never happen. And truthfully, most of this stuff might be better done as software for a PDA. I loved my HP41, and I'm pretty fond of my HP48s - but technology has marched on, alas. -- Steve Ballantyne (9907) ==== >Mmmmm... An HP41 with >1Mb RAM... and a much better CPU than the Saturn. And much faster. >a display that shows the complete stack, plus some registers... how will you realize that in a calc, where the stack can take full memory capacity?! How large will the display be? 50? ;-) >accessories to go with it such as barcode scanners, data collection gear >etc ... the same simple HP41 language, but with every extension module >ever developed in ROM... maybe a few PDA-type applications -- diary, >address book, text editor, to-do list... simple graphics display... an >XScale CPU... And a kind of mobile mass-storage system. For instance a drive with small MODs, like the Sony MiniDisc. But i wouldn't even refuse e sophisticatesd type of megnetic cards... Or, better, ist can handle CF-Cards, Type II preferred. With the new 3 and 4GB Microdrives there wouldn't ever be any memory-problems... ;-)) Volker ==== Or just imagine the 67CX ;-) Raymond Volker Neurath schrieb im Newsbeitrag Mmmmm... An HP41 with >1Mb RAM... and a much better CPU than the Saturn. And much faster. a display that shows the complete stack, plus some registers... how will you realize that in a calc, where the stack can take full > memory capacity?! How large will the display be? 50? ;-) accessories to go with it such as barcode scanners, data collection gear >etc ... the same simple HP41 language, but with every extension module >ever developed in ROM... maybe a few PDA-type applications -- diary, >address book, text editor, to-do list... simple graphics display... an >XScale CPU... And a kind of mobile mass-storage system. For instance a drive with > small MODs, like the Sony MiniDisc. > But i wouldn't even refuse e sophisticatesd type of megnetic cards... Or, better, ist can handle CF-Cards, Type II preferred. > With the new 3 and 4GB Microdrives there wouldn't ever be any > memory-problems... ;-)) Volker ==== >Mmmmm... An HP41 with >1Mb RAM... and a much better CPU than the Saturn. And much faster. >a display that shows the complete stack, plus some registers... how will you realize that in a calc, where the stack can take full > memory capacity?! How large will the display be? 50? ;-) We're talking about a super HP41 here, aren't we? Therefore the stack is only X,Y,Z,T and L , not the unlimited depth stack of a 48. And frankly, for day-to-day calculations without surplus keystrokes I much prefer the 41's four-level stack. -- Steve Ballantyne (9907) ==== >> how will you realize that in a calc, where the stack can take full >> memory capacity?! How large will the display be? 50? ;-) We're talking about a super HP41 here, aren't we? Yes. >Therefore the stack is only X,Y,Z,T and L , Why? Even a spuer-41 can have | the unlimited depth stack of a 48. >And frankly, for day-to-day calculations without >surplus keystrokes I much prefer the >41's four-level stack. Oh, even for all-day calculations i like the 48th unlimitesd stack. If i only could remember all the stack manipulation commands... Volker ==== >>> how will you realize that in a calc, where the stack can take full >>> memory capacity?! How large will the display be? 50? ;-) >>We're talking about a super HP41 here, aren't we? > Yes. >>Therefore the stack is only X,Y,Z,T and L , > Why? Even a spuer-41 can have > | the unlimited depth stack of a 48. Then it wouldn't be a 41. Lots of 41 programs depend on the 4-level stack to work correctly. I wouldn't consider any calc to be a true 41 unless it can run, unmodified, any 41 program (and that includes synthetic programs). -- Wayne Brown | When your tail's in a crack, you improvise fwbrown@bellsouth.net | if you're good enough. Otherwise you give | your pelt to the trapper. e^(i*pi) = -1 -- Euler | -- John Myers Myers, Silverlock ==== >> how will you realize that in a calc, where the stack can take full >> memory capacity?! How large will the display be? 50? ;-) We're talking about a super HP41 here, aren't we? Yes. >Therefore the stack is only X,Y,Z,T and L , Why? Even a spuer-41 can have | the unlimited depth stack of a 48. >And frankly, for day-to-day calculations without >surplus keystrokes I much prefer the >41's four-level stack. Oh, even for all-day calculations i like the 48th unlimitesd stack. > If i only could remember all the stack manipulation commands... > I rest my case. -- Steve Ballantyne (9907) ==== >Then it wouldn't be a 41. Lots of 41 programs depend on the 4-level >stack to work correctly. I wouldn't consider any calc to be a true >41 unless it can run, unmodified, any 41 program (and that includes >synthetic programs). There is no reason, why 41-programs that make use if the 4-level-stack won't work on an unlimited stack. Volker ==== > There is no reason, why 41-programs that make use of > the 4-level-stack won't work on an unlimited stack. Actually, there are several reasons. Here are a few that spring to mind: Many RPN programs made use of the automatic replication feature of the T register (level 4, the Top level). Any such program would fail to run in RPL, which has no such feature. The program could of course be rewritten to emulate level-T-replication, but it would not be trivial. In any case, the point is that it would fail to run as-is. Also, the 4-level stack has a stack lift disable feature that makes keyboard inputs overwrite the X register instead of raising X to Y like usual. Once again, RPL has no such feature, so RPN programs that depend on it would have to be rewritten in RPL. This particular task would be trivial (just adding a DROP, probably), but it must be done or the program will fail. The HP-41 can directly address the entire stack. For example, STO Z as 3 UNPICK... but there's no simple equivalent in HP48 RPL. A particularly hairy HP-41 command that the PPC ROM made clever use of (not because it was necessary but because it's delightful to behold) is X<>L, which swaps the X register with the LASTx register. Not only does RPL have no LASTx (no, LASTARG is not the same as LASTx), but it has no swap level 1 with variable FOO' feature either. Needless to say, RPN programs containing X<>L (or any of its hairy kin) would not work in RPL without significant recoding. -Joe- ==== > There is no reason, why 41-programs that make use of >> the 4-level-stack won't work on an unlimited stack. [List of Arguments snipped] And who says, that all what you said isn't possible to implement in a new Super 41 wich has unlimited Stack? And why shouldn't it be possible, that ist has both, RPL _and_ RPN commands as well? Of course, it won't be trivial to implement this. But who said, that ist wopuld be easy to build a new super-41? Volker ==== >>> There is no reason, why 41-programs that make use of >>> the 4-level-stack won't work on an unlimited stack. > [List of Arguments snipped] > And who says, that all what you said isn't possible to implement in a > new Super 41 wich has unlimited Stack? > And why shouldn't it be possible, that ist has both, RPL _and_ RPN > commands as well? > Of course, it won't be trivial to implement this. But who said, that > ist wopuld be easy to build a new super-41? If you mean a way to turn off the unlimited stack -- perhaps a flag that makes the Super-41 operate like a real 41 -- then that would be acceptable to me. But I wouldn't want it unless it was possible to make it behave *exactly* like a 41 (except for having more memory available, of course). -- Wayne Brown | When your tail's in a crack, you improvise fwbrown@bellsouth.net | if you're good enough. Otherwise you give | your pelt to the trapper. e^(i*pi) = -1 -- Euler | -- John Myers Myers, Silverlock ==== > And why shouldn't it be possible, that ist has both, RPL _and_ RPN > commands as well? Of course, it won't be trivial to implement this. But who said, that > ist wopuld be easy to build a new super-41? > These problems have been solved long time ago by Zengrange (see below;-) > If you mean a way to turn off the unlimited stack -- perhaps a flag > that makes the Super-41 operate like a real 41 -- then that would be > acceptable to me. But I wouldn't want it unless it was possible to make > it behave *exactly* like a 41 (except for having more memory available, > of course). > So it seems the best would be to use the HP-41 emulator library from Zengrange on an HP-48. This way you could easily switch between at least *three* views (HP-48, HP-41 classic, HP-41 full stack), and two user interface styles (HP-48, HP-41). And, your HP-41 programs will run without any modifications. Raymond ==== >>> There is no reason, why 41-programs that make use of >>> the 4-level-stack won't work on an unlimited stack. > [List of Arguments snipped] > And who says, that all what you said isn't possible to implement in a > new Super 41 wich has unlimited Stack? And why shouldn't it be possible, that ist has both, RPL _and_ RPN > commands as well? Of course, it won't be trivial to implement this. But who said, that > ist wopuld be easy to build a new super-41? If you mean a way to turn off the unlimited stack -- perhaps a flag > that makes the Super-41 operate like a real 41 -- then that would be > acceptable to me. But I wouldn't want it unless it was possible to make > it behave *exactly* like a 41 (except for having more memory available, > of course). The Super-41 A) could have that flag top set compatibility mode B) Have an adjustable stack size, where 0 SSIZE means unlimited (memory permitting) sized stack, yours could have 4 SSIZE, which is naturally the default, whil.9ae mine could be 5 SSIZE ==== > If you mean a way to turn off the unlimited stack -- perhaps a flag > that makes the Super-41 operate like a real 41 -- then that would be > acceptable to me. But I wouldn't want it unless it was possible to make > it behave *exactly* like a 41 (except for having more memory available, > of course). > -- > Wayne Brown | When your tail's in a crack, you improvise Gene: I have one of these Super HP-41s. It's called an HP-42S that has been upgraded to 32K of ram. :-) That's almost close enough to my ultimate machine. If only it had I/O. -- * These statements and opinions are mine alone and do not reflect my employer's views. * ==== Just some thought and comments... > There is no reason, why 41-programs that make use of > the 4-level-stack won't work on an unlimited stack. Actually, there are several reasons. Here are a few that spring to mind: Many RPN programs made use of the automatic replication feature of the T > register (level 4, the Top level). Any such program would fail to run in RPL, > which has no such feature. The program could of course be rewritten to > emulate level-T-replication, but it would not be trivial. In any case, the > point is that it would fail to run as-is. This can be done using some local variable on the 48/49. As about trivial or non-trivial, I think that it can't be very complicated if one completely abandons the T-stack-replication-principle. > Also, the 4-level stack has a stack lift disable feature that makes keyboard > inputs overwrite the X register instead of raising X to Y like usual. Once > again, RPL has no such feature, so RPN programs that depend on it would have > to be rewritten in RPL. This particular task would be trivial (just adding a > DROP, probably), but it must be done or the program will fail. I consider the behavior of the newer machines better in the sence that it is more generalized. There are no buts. Any command will remove its arguments from the stack and return results on the stack (if any). There are no commands that expect their arguments/parameters after them. A generalized behavior, fewer rules, fewer things to remember. In other words a simpler world. > The HP-41 can directly address the entire stack. For example, STO Z > as 3 UNPICK... but there's no simple equivalent in HP48 RPL. Without UNPICK we can do that using: << -> l << l ROLL DROP DUP l ROLLD >> where l is the number of the stack level where we want to store the contents of stack level 1. I don't know if that can be called simple. > A particularly hairy HP-41 command that the PPC ROM made clever use of (not > because it was necessary but because it's delightful to behold) is X<>L, which > swaps the X register with the LASTx register. Not only does RPL have no LASTx > (no, LASTARG is not the same as LASTx), It is not the same and LASTARG is better (for me) because from LASTARG you can get LASTx, while the opposite is not always possible. Anyway, LASTx can be done using vectored enter and some variable as storage place for the last level 1 argument. > but it has no swap level 1 with > variable FOO' feature either. Oh, come on now Joe! DUP RCL UNROT STO would do that. > Needless to say, RPN programs containing X<>L > (or any of its hairy kin) would not work in RPL without significant recoding. Oh well, depends on what you call significant, but you are right saying that recoding is needed. Anyway, I just wonder if still treasuring the 41 (which I also do) perhaps has to do with... nostalgia...??? You know, in the sense: oh that beautiful times when I was young and full of enthousiasm for that fantastic technology and felt like Perry Rhodan.... Perhaps one should keep that enthousiastic thinking for ever and consider anything with that particular enthousiasm which was part of the considerations in those glorious days of the 41? Perhaps.. Greetings, Nick Banner. ==== X > A particularly hairy HP-41 command that the PPC ROM made clever use of (not > because it was necessary but because it's delightful to behold) is X<>L, which > swaps the X register with the LASTx register. Not only does RPL have no LASTx > (no, LASTARG is not the same as LASTx), It is not the same and LASTARG is better (for me) because from LASTARG > you can get LASTx, while the opposite is not always possible. Anyway, LASTx can be done using vectored enter and some variable as > storage place for the last level 1 argument. Vectored ENTER? Can you show us it here, Nick? (waiting for the answer about two weeks, since Nick is a perfectionist) ==== I would guess you could easily find someone willing to give you a 48 for a 41CX in good condition, but not many who would give up a 41CX for a 48. --Lars ==== Is a slide rule worth a 41CX? Stan Warning: Opinions subject to change without notice. > >>Mmmmm... An HP41 with >1Mb RAM... >> >> and a much better CPU than the Saturn. And much faster. >> >>a display that shows the complete stack, plus some registers... >> >> how will you realize that in a calc, where the stack can take full >> memory capacity?! How large will the display be? 50? ;-) We're talking about a super HP41 here, aren't we? Therefore the stack is >only X,Y,Z,T and L , not the unlimited depth stack of a 48. And frankly, >for day-to-day calculations without surplus keystrokes I much prefer the >41's four-level stack. ==== >>Mmmmm... An HP41 with >1Mb RAM... >>> and a much better CPU than the Saturn. And much faster. >>>a display that shows the complete stack, plus some registers... >>> how will you realize that in a calc, where the stack can take full >> memory capacity?! How large will the display be? 50? ;-) We're talking about a super HP41 here, aren't we? Therefore the stack is >only X,Y,Z,T and L , not the unlimited depth stack of a 48. And frankly, >for day-to-day calculations without surplus keystrokes I much prefer the >41's four-level stack. Is a slide rule worth a 41CX? > If they ever made a programmable slide rule, I never heard about it. However, I do have a bamboo Hemmi 251 with leather case, and a plastic Faber Castell Rietz 57/87 with case and manual, either of which I'd swap for a working 41CX... -- Steve Ballantyne (9907) ==== > Is a slide rule worth a 41CX? I'd say it depends on the type and condition of the slide rule, and the condition of the 41. Some slipsticks can be bought for a few dollars, others cost hundreds. I'm keeping my 41CX *and* my slide rules. -- Wayne Brown | When your tail's in a crack, you improvise fwbrown@bellsouth.net | if you're good enough. Otherwise you give | your pelt to the trapper. e^(i*pi) = -1 -- Euler | -- John Myers Myers, Silverlock ==== I keep my old slide rule in case the power goes out. ; -) >> Is a slide rule worth a 41CX? I'd say it depends on the type and condition of the slide rule, and the >condition of the 41. Some slipsticks can be bought for a few dollars, >others cost hundreds. I'm keeping my 41CX *and* my slide rules. ==== Is a slide rule worth a 41CX? Depends on the slide rule. I own among others a Keuffel & Esser 4081-5 Log Log Duplex Decitrig - the scale is 20 long - in practically mint condition, only a slight patina due to a couple decades of careful use, in its original orange leather case. I taught my teenage daughter logarithms on it, try doing that half as effectively on any digital device. I wouldn't trade my 4081-5 for another HP41-CX, or even another HP41-CV with a quad memory module. Then again I've already got one of each of those too... Yours WD old K - WKiernan@concentric.net ==== I wounder is there away work like in Excel on the HP 49G. First I enter a series of numbers in the martixwriter, then how can I enter equation for a hole colum? I tried Xcell48 but I could get a plot. How do I get a scatter plot i Xcell48? Is it possible to export a file from Xcell48 an then open it in the matrixwriter? How do I convert the textfile I get from Xcell48, so I use it in the matrixwriter? Joakim ==== Yo! I donno, man. I used to make a copy of the numeric matrix and then use - was it MAP - to the copy. Also using AXL and then DOSUBS or DOLIST can simulate some sort of spreadsheet... I wounder is there away work like in Excel on the HP 49G. First I enter a > series of numbers in the martixwriter, then how can I enter equation for a > hole colum? I tried Xcell48 but I could get a plot. How do I get a scatter > plot i Xcell48? Is it possible to export a file from Xcell48 an then open it > in the matrixwriter? How do I convert the textfile I get from Xcell48, so I > use it in the matrixwriter? > Joakim A suggestion was made to use Debug4 as a better alternative to the connectivity kit. 48SX only talks kermit..... can I upload equations, variables and programs from SX using kermit and then download them into hp49 using another protocol ???? ==== A) Upload to PC using any protocol that works and then downloading to another (or the same) device using a different protocol that works is OK B) Direct connection between two HP calculators via a serial cable MUST use the same protocol and the same settings at both ends > A suggestion was made to use Debug4 as a better alternative to the connectivity > kit. 48SX only talks kermit..... can I upload equations, variables and programs > from SX using kermit and then download them into hp49 using another protocol > ???? ==== --------------------------------------------------------------------- Hallo ! my mesurements and findings. It seems not so easy with the vertical synchronization. I think they designed a little mess with this nice feature. greetings, Christian Daniel I can't comment on the electronics of it but I can tell you that the > overhead display unit is exceedingly annoying because if you plug the > calculator into it while it is switched on then the LCD in the panel > almost always displays 'rolled' by about half a screen and you have to > repeatedly hit a button to roll it down the screen until it displays > properly. On the other hand if you plug it in with the calculator > switched off and then turn the calculator on then there is usually no > problem. This is the case for the 38G and the 39/40G. > Hallo ! I just analyzed the video signals on the 10 pin connector of the HP38G > calculator. I think they are more or less identical to the HP48GX > signals found on the internal connector. But I found a problem with the vertical synchronization. This bit > sometimes vanishes, for instance in the plot screen without any menue > bar. Does anybody have any further informations about the display video > signals? > There had been some overhad displays for the HP38G and HP48GX. How they > done it ?? Greetings, Christian Daniel --------------------------------------------------------------------- name=christian.daniel.vcf filename=christian.daniel.vcf begin:vcard n:Daniel;Christian tel;work:++49/421/539-4694 x-mozilla-html:FALSE org:Astrium Space Infrastructure;IO 65, Data Processing Equipment adr:;;Huenefeldstrasse 1-5;Bremen;;D-28199;Germany version:2.1 x-mozilla-cpt:;29752 fn:Christian Daniel end:vcard --------------3C34DAB176F052981DD61814-- ==== Links of the new Casio ClassPad 300 Books in: www.classpad.org/classpad_files/ClassPad_sample1.pdf www.classpad.org/classpad_files/ClassPad_sample2.pdf www.classpad.org/classpad.html Games in: www.classpad.org/Classpad/classpad_chip.htm otros links www.casio.com/education/index.cfm?page=/education/a22_vs_ti.htm www.mi.uni-erlangen.de/~tschach/Saarb/VortragSB.html www.classpad.org/Classpad/advanced_geometry/Napoleon.html www.classpad.org/Classpad/LinearEquations/Parabolas.html www.classpad.org/Classpad/LinearEquations/Ellipses.html www.classpad.org/Classpad/LinearEquations/Tangents.html www.classpad.org/Classpad/LinearEquations/LinearEquations.html www.classpad.org/Classpad/LinearEquations/Sequences.html www.classpad.org/Classpad/LinearEquations/Collinearity.html www.classpad.org/Classpad/LinearEquations/Slope.html www.classpad.org/Classpad/LinearEquations/SlopeHotlink.html www.classpad.org/Classpad/LinearEquations/InterceptHotlink.html www.classpad.org/Classpad/LinearEquations/Area.html www.classpad.org/Classpad/LinearEquations/SimilarTriangles.html www.classpad.org/Classpad/LinearEquations/SumAnglesRegularPolygon.html www.classpad.org/Classpad/LinearEquations/ParallelsPerpendiculars.html www.classpad.org/Classpad/LinearEquations/SlopesPerpendiculars.html www.classpad.org/Classpad/LinearEquations/SpecialShapes.html www.classpad.org/Classpad/LinearEquations/LineThru1Point.html www.classpad.org/Classpad/LinearEquations/LineThru2Points.html www.classpad.org/Classpad/advanced_geometry/Napoleon.html www.classpad.org/Classpad/advanced_geometry/Paucellier.html www.classpad.org/Classpad/advanced_geometry/4_Bar_Linkage.html www.classpad.org/Classpad/advanced_geometry/Cubic_Spline.html www.casio.co.jp/edu_e/support/faq/faq_hpc.html www.casio.com/education/index.cfm?page=/education/computer.htm ==== I'm moving my first steps in programming my HP48G (512Kb upgrade by Cynox). First result is the following procedure that draft the well known Mandelbrot set. Yes, I know it's really slow (about half an hour, depending also from the loops'max recursion number), but, I repeat, it's my first attempt, so please, be patient... In my intention this was to be my first, symbolic contribute to the list. In reality, I know it's a quite hilarious, slow, implementation in RPL. So, let me say that I take occasion to welcome any suggestion and encouragement to: 1) make more slender and fast this procedure. 2) better, have news by someone interested in translating in System RPL and make also a more complete program. By myself, I'm strongly interested in learning Sys RPL, but: 1) time is lacking 2) I wish to start gradually, and while several guides are available on the net (I've downloaded and printed several ones), the ones with a less steep learning curve are out of publication, or really expensive when available here in Italy. Who knows, in the future... P.S. As the Mandelbrot set program is quite slow in completing a draw, if anyone interested in getting a pair of completed picture would help me suggesting on how to take them off from my HP48 and make them available on the net, I would be happy. Gianluca << erase -2.58 -0.88 0 0 0 -> <-A <-B <-X <-Y <-N << 0 130 for <-J <-A 0.0299237 + '<-A' sto -.88 '<-B' sto 0 63 for <-k <-B 0.0275 + '<-B' sto 0 '<-X' sto 0 '<-Y' sto 0 '<-N' sto while <-N 100 < <-X SQ <-Y + 4 < and repeat <-X SQ <-Y SQ - <-A + 2 <-X * <-Y * <-B + <-N 1 + '<-N' sto '<-Y' sto '<-X' sto end if <-N 2 mod 0 == then <-J <-K R->C pixon end next next >> PP.S.: -> and <- are, respectively, the right and left arrow symbols; the only effective minus relation is the one in the while condition line. ==== try this link: http://www.hpcalc.org/hp48/graphics/misc/beno.zip or more general: http://www.hpcalc.org/search.php?query=Mandelbrot I haven't checked them all, but maybe the one or other comes with sources and/or explanation. Have fun, Raymond ==== X > P.S. As the Mandelbrot set program is quite slow in completing a draw, X It's time for ML ==== > X > P.S. As the Mandelbrot set program is quite slow in completing a draw, > X > It's time for ML If you go to hpcalc.org and type MANDELBROT into the search field, you'll get lots of programs (including mine). There's one in ML as well, and fairly fast. If you want *really* fast fractals on a PC, do a search for FRACTINT on the Web. It's completely amazing. Best wishes, Bill ==== I have bought two Klotz's memory cards (128kb and 1Mb) last summer, they works fine for several months, but the 128 kb has failed. I don't know what is happening. First it causes a Invalid card data error, It's an usually message with low battery, I changed it but the problem continues. In last weeks I haven't installed new libraries, so it don't seems to be a problem of corrupted libraries. I proved it in other empty memory hp48, slot 1, and the invalid card data continues, PINIT don't solve the problem. But if I store a library in port 1, it works, but always I switch on the calculator, all libraries are initialized. I removed the batterie from the card for a week, and when I use it again the problem is exactly the same. Really I don't understand what is happening and I'm not sure it's a hardware ==== > I have bought two Klotz's memory cards (128kb and 1Mb) last summer, they > works fine for several months, but the 128 kb has failed. I don't know what > is happening. First it causes a Invalid card data error, It's an usually > message with low battery, I changed it but the problem continues. In last > weeks I haven't installed new libraries, so it don't seems to be a problem > of corrupted libraries. > I proved it in other empty memory hp48, slot 1, and the invalid card data > continues, PINIT don't solve the problem. But if I store a library in port > 1, it works, but always I switch on the calculator, all libraries are > initialized. I removed the batterie from the card for a week, and when I use > it again the problem is exactly the same. > Really I don't understand what is happening and I'm not sure it's a hardware I'm sure he'll help you determine where the problem lies and replace the card if it's defective. -- Wayne Brown | When your tail's in a crack, you improvise fwbrown@bellsouth.net | if you're good enough. Otherwise you give | your pelt to the trapper. e^(i*pi) = -1 -- Euler | -- John Myers Myers, Silverlock ==== Every time that a card gives me spurious Invalid Card Data errors, it gets solved by cleaning the card's contacts AND the port's contacts. The latter can be done by doing the former, then inserting and removing the card a bunch of times, and repeating until no more gunk shows up when cleaning the card's contacts. I even have a few cards that only work when FIRMLY seated. Just plugging 'em in isn't enough; I have to WIGGLE 'em in place and then push hard on both of the card's corners. Then the Invalid Card Data message goes away and all's well... until I drop the calculator and the card moves slightly. )-: Hey, anybody know a better way to clean the port contacts? My way seems like brushing one's teeth with a TOOTSIE ROLL. (Would that lead to TOOTH ROT? Do dentists perform TOOTH UNROT? Should I use a TOOTH PICK or a TOOTH UNPICK?) -jkh- ==== >Every time that a card gives me spurious Invalid Card Data errors, it gets >solved by cleaning the card's contacts AND the port's contacts. The latter >can be done by doing the former, then inserting and removing the card a bunch >of times, and repeating until no more gunk shows up when cleaning the card's >contacts. I even have a few cards that only work when FIRMLY seated. Just plugging 'em >in isn't enough; I have to WIGGLE 'em in place and then push hard on both of >the card's corners. Then the Invalid Card Data message goes away and all's >well... until I drop the calculator and the card moves slightly. )-: Hey, anybody know a better way to clean the port contacts? My way seems like >brushing one's teeth with a TOOTSIE ROLL. (Would that lead to TOOTH ROT? Do >dentists perform TOOTH UNROT? Should I use a TOOTH PICK or a TOOTH UNPICK?) -jkh- > Someone once told me to use an eraser similar to one on a number 2 lead pencil. An ink eraser might work too. It seems to be a bit more abrasive. I used these methods on my old TI-59 printer contacts and TI-59 calculator. Harold A. Climer Physics/Astronomy Lab Instructor U. Tennessee At Chattanooga ==== > Hey, anybody know a better way to clean the port contacts? > Someone once told me to use an eraser ... Card contacts, ok. But how about the *port* contacts? -Joe- ==== >Card contacts, ok. But how about the *port* contacts? > Ordinary white paper is around the right consistency. Use something of the right thickness to support it (popsicle stick?). Do it in the summer when the humidity is up, or find some way to prevent the static build-up rubbing an insulator on the metal contacts. Bill alternate E-dress wtstorey@ieee.org.no.spam.please (Use the obvious) ==== Two months ago I bought two Klotz's memory cards (128kb and 4Mb). The first worked and works fine, but the 4mb one gave me some problems. My problem is that fi the card is inserted to the end of the slot, then it gives me the invalid card data error and appears only with one :2: port. The result is that it doesn't work. I send back the card to Klotz, he said that there was a problem with contacts, solders or something similar, but it was solved and tested. But when the card returned to me, it worked in the same way than before the reparation. I don't know how I realized that if i insert only a little the card and then push it with the black cap. But my memory and my calc are now working fine. After all, there is a problem with dimensions in my calc, my ram card or in both. I hope that my experiences will help you to solve your problem. And other thing, when I send my card back to Klotz, i had no problems with Ricardo Garc.92a Wayne Brown escribi.97 en el mensaje > I have bought two Klotz's memory cards (128kb and 1Mb) last summer, they > works fine for several months, but the 128 kb has failed. I don't know what > is happening. First it causes a Invalid card data error, It's an usually > message with low battery, I changed it but the problem continues. In last > weeks I haven't installed new libraries, so it don't seems to be a problem > of corrupted libraries. I proved it in other empty memory hp48, slot 1, and the invalid card data > continues, PINIT don't solve the problem. But if I store a library in port > 1, it works, but always I switch on the calculator, all libraries are > initialized. I removed the batterie from the card for a week, and when I use > it again the problem is exactly the same. Really I don't understand what is happening and I'm not sure it's a hardware I'm sure he'll help you determine where the problem lies and replace > the card if it's defective. -- > Wayne Brown | When your tail's in a crack, you improvise > fwbrown@bellsouth.net | if you're good enough. Otherwise you give > | your pelt to the trapper. > e^(i*pi) = -1 -- Euler | -- John Myers Myers, Silverlock > ==== I think you should enter -1. and 0. in the matrix A (note the decimal points), > it will work then. > Apparently the numeric solver doesn't check the type of the input matrix > (in this case, A is type 29. because it contains an integer - if you change > the -1 and 0 to -1. and 0., the matrix type becomes 3. - real matrix.) > Definitely a bug. Werner I didn't think of. Bill ==== >> Usually the numeric solver in HP49 (the solve lin sys in this >> case) seems to work ok, but today it gave me really strange >> results. Either this is a bug or (more likely) I've managed to set >> some very esoteric flag. But I can't find what is wrong and a on+F3 >> doesn't helt. ROM version is 1.19-6 [...] > You should report this on the bug list as a SERIOUS bug. There is something strange going on here. If it hasn't been reported already could any of you guys do it - you seem to have a much deeper understanding of the details of the problem than I do (and I don't have a Bugzilla account)? ==== (in message <55447677.0303100727.5067a764@posting.google.com>): > Is anyone familiar with this calculator? I own one! As far as hardware is concerned, it is basically a Ti-92+ with more flash memory and a smaller form factor. Same speed and same amount of RAM though (what a pity). For those who don't know, the main processor is a MC-68000, which is a very nice and fast processor. I suppose it will be easy to overclock it significantly (I'll do it when my warranty expire). As far as software is concerned, the current OS is AMS 2.08, which includes the full set of trig and hyperbolic functions (24 of them), a useless icon desktop, and a full set of clock functions. Built in apps include data/matrix editor, grapher, numeric solver, program editor, text editor, table editor, function editor Bundled apps include a spreadsheet, stat package, simult eq solver, finance tool, polynomial root finder, and two very nice geometry tools Now my personal judgement as an HP lover (I have/had an HP-41CV, HP16-C, The V200 hardware is head and shoulder above the HP49G. Unfortunately, the software is not very well optimized and for most tasks, the speed is not really up to par. In most cases however, it is still faster than an HP-49G. The TI software is significantly less powerful than the HP49G. However it is still good enough for most tasks. The TI learning curve is several orders of magnitude less steep than the HP49G's. Being the owner of both, it turns out that I take my V200 first and turn to my HP49G if the V200 fails. Overall, I use the V200 95% of the time. I am sorry I had to write this. J-D ==== > I am sorry I had to write this. Sorry? What for? Also, as far as TI functionality goes, in case you haven't heard about the tip list: http://www.angelfire.com/realm/ti_tiplist/ or MathTools (download link at the top): http://triton.towson.edu/users/bbhatt1/ti/MathTools.htm A fellow TI user, Bhuvanesh. ==== > or MathTools (download link at the top): http://triton.towson.edu/users/bbhatt1/ti/MathTools.htm That looks quite interesting, but the download link gives a page unavailable error. Also, by when do you plan to fix the serious bugs (Priority 1 and 2, I guess)? -- Helen. ==== > or MathTools (download link at the top): > http://triton.towson.edu/users/bbhatt1/ti/MathTools.htm That looks quite interesting, but the download link gives a page > unavailable error. Oops, sorry, thanks for catching that. The link should be: http://triton.towson.edu/users/bbhatt1/ti/mathtools.zip > Also, by when do you plan to fix the serious bugs > (Priority 1 and 2, I guess)? All three priority 1 bugs should be fixed by the next release, if all goes well. I also plan to update GMP and fix the CoefList bug soon. I'm not sure about the others, since I'm short on time at the moment. Bhuvanesh. ==== > Oops, sorry, thanks for catching that. The link should be: http://triton.towson.edu/users/bbhatt1/ti/mathtools.zip Whoops, now your web pages are gone altogether. Looks like they did not like you using their web site for distribution of your software... > Also, by when do you plan to fix the serious bugs > (Priority 1 and 2, I guess)? All three priority 1 bugs should be fixed by the next release, if all > goes well. I also plan to update GMP and fix the CoefList bug soon. > I'm not sure about the others, since I'm short on time at the moment. Very nice collection. It's almost as nice as John Holland's Engineering Mathematics Library for the HP48. _That_ is what should have been built into the 49, instead of the half-broken and mostly useless CAS. I would take a TI with your Mathtools over any HP49 anytime..