[HP-15C] Android version display weird behaviour? - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: Not HP Calculators (/forum-7.html) +--- Forum: Not quite HP Calculators - but related (/forum-8.html) +--- Thread: [HP-15C] Android version display weird behaviour? (/thread-5176.html) Pages: 1 2 [HP-15C] Android version display weird behaviour? - Marcio - 11-21-2015 05:08 PM Gents, While trying to reallocate memory on the 15c Android emulator, I noticed the display will show some weird characters and will compute uu incorrectly when DIM(i) is set to 2: Code: 1        64        0-0 2        57        0-0 3        5o        0-0 4        5-        0-0 5        5r        0-0 6        59        0-0 7        58        0-0 The Windows emulator does not have this problem, which was observed on both Android devices I own. I tried resetting it to no avail. Many thanks. Marcio RE: [HP-15C] Android version display weird behaviour? - Bill (Smithville NJ) - 11-22-2015 03:38 PM (11-21-2015 05:08 PM)Marcio Wrote:  While trying to reallocate memory on the 15c Android emulator, I noticed the display will show some weird characters and will compute uu incorrectly when DIM(i) is set to 2: Which Android Emulator are you using? There are several in the Google Play Store. Bill WD9EQD RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-22-2015 03:39 PM The one by HP. RE: [HP-15C] Android version display weird behaviour? - Bill (Smithville NJ) - 11-22-2015 03:57 PM (11-22-2015 03:39 PM)Marcio Wrote:  The one by HP. Okay. I'm not using any of the 15C emulators. Maybe someone on the Forum can verify that they are seeing the same results with the HP Android Emulator. Bill Smithville, NJ RE: [HP-15C] Android version display weird behaviour? - Gerald H - 11-22-2015 04:28 PM I have/use go15c, haven't noticed any problems so far. Why pay € 19 for the HP version? go15c less than half the price & reliable. Can't say I understand your problem. RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-22-2015 04:38 PM (11-22-2015 04:28 PM)Gerald H Wrote:  I have/use go15c, haven't noticed any problems so far. Why pay € 19 for the HP version? go15c less than half the price & reliable. Well, the reason I purchased the 15C app from HP was that I thought it was as bug-free as the actual 15C. I mean no disrespect for those who build their own emulators but I prefer the ones made by experienced companies like HP as I can't afford mistakes at what I do. Marcio RE: [HP-15C] Android version display weird behaviour? - Massimo Gnerucci - 11-22-2015 05:23 PM (11-22-2015 04:38 PM)Marcio Wrote:   (11-22-2015 04:28 PM)Gerald H Wrote:  I have/use go15c, haven't noticed any problems so far. Why pay € 19 for the HP version? go15c less than half the price & reliable. Well, the reason I purchased the 15C app from HP was that I thought it was as bug-free as the actual 15C. I mean no disrespect for those who build their own emulators but I prefer the ones made by experienced companies like HP as I can't afford mistakes at what I do. Marcio I don't see how the Lost Art Of Making Very Good Calculators would translate into the business of writing sloppy apps... RE: [HP-15C] Android version display weird behaviour? - Bill (Smithville NJ) - 11-22-2015 06:17 PM (11-22-2015 04:38 PM)Marcio Wrote:   (11-22-2015 04:28 PM)Gerald H Wrote:  I have/use go15c, haven't noticed any problems so far. Why pay € 19 for the HP version? go15c less than half the price & reliable. Well, the reason I purchased the 15C app from HP was that I thought it was as bug-free as the actual 15C. I mean no disrespect for those who build their own emulators but I prefer the ones made by experienced companies like HP as I can't afford mistakes at what I do. Marcio GO15C uses the ROM that is dumped from a real HP-15C. This can make it difficult for people to use this emulator if they don't have a dump of the ROM. Does anyone know what the Emulator by HP uses? Is it the original ROM code or is it something else? I prefer emulators that use the same ROM as my actual calculator. The lone exception is the Free 42S which is excellent. Bill Smithville, NJ RE: [HP-15C] Android version display weird behaviour? - Gerald H - 11-23-2015 07:59 AM (11-22-2015 04:38 PM)Marcio Wrote:   (11-22-2015 04:28 PM)Gerald H Wrote:  I have/use go15c, haven't noticed any problems so far. Why pay € 19 for the HP version? go15c less than half the price & reliable. Well, the reason I purchased the 15C app from HP was that I thought it was as bug-free as the actual 15C. I mean no disrespect for those who build their own emulators but I prefer the ones made by experienced companies like HP as I can't afford mistakes at what I do. Marcio HP is an evolving business, HP 1990 != HP 2015. Recent evidence - 33S, 35S, 39gII, Prime, Prime App + ? - displays lack of care for quality of product. As for amateurs: consider the Metakernel & 49G, produced by individuals really interested in the end product. Many problems with 49G, openly discussed & eventually mostly clarified. Do you trust the Prime? RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-23-2015 10:16 AM Gerald, I understand. Regarding the Go15c app you purchased, have you ever got it to run (root solving etc) for more than 10 seconds? The HP-15C app will also crash on both devices if the operation demands time to finish. It either outputs the result immediately or crashes after 2 seconds or so. Thank you. PS: As for the question I raised in this thread, the amount of memory reallocated is correct despite the incorrect readings on the display. Marcio RE: [HP-15C] Android version display weird behaviour? - Gerald H - 11-23-2015 10:49 AM Yes, Marcio, I have used the go15c solver to solve the example on p 181 of User's Manual Ed 2.4, Sep 2011, requiring 13.83 sec. Solution was found correctly, no mis-functions. RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-23-2015 11:16 AM Gerald, Something is not right here. The example reported on page 181 shows how to solve $$x^2-3x-10=0$$. The actual 15c (original, not LE) takes about 14.51 seconds the find the root with FIX 4. On both Android devices I have running HP-15c, the root is displayed immediately, no delay. Maybe Go15c also emulates the speed of the real thing? Thanks. Marcio RE: [HP-15C] Android version display weird behaviour? - Gerald H - 11-23-2015 11:22 AM To post #8: Free42 is an excellent calculator in its own right. Android go42s is a better emulator - the only deviation from original is in memory size & speed of calculation. RE: [HP-15C] Android version display weird behaviour? - Gerald H - 11-23-2015 11:28 AM (11-23-2015 11:16 AM)Marcio Wrote:  Gerald, Something is not right here. The example reported on page 181 shows how to solve $$x^2-3x-10=0$$. The actual 15c (original, not LE) takes about 14.51 seconds the find the root with FIX 4. On both Android devices I have running HP-15c, the root is displayed immediately, no delay. Maybe Go15c also emulates the speed of the real thing? Thanks. Marcio go42s has settings of 1, 2, 4, 8 & 16 times true calculator speed, plus the setting Max speed. I use 1 * original speed. In the example I quoted I used full accuracy, 10 digits. RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-23-2015 11:35 AM The HP-15c app does not have this feature. As a matter of fact, I have never seen the display blink 'RUNNING'. It goes blank and either displays the result in less than 2 seconds or crashes. Marcio RE: [HP-15C] Android version display weird behaviour? - Gerald H - 11-23-2015 11:47 AM I have not tested the go15c solver extensively, have however not experienced any problems. Can you post here one of the problems causing a crash? RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-23-2015 02:20 PM Well, I had never paid much attention to the crashes before because I usually use either the 50g or 15c to solve problems, the 50g when it requires more processing power or more memory for large matrix operations. Most recently, I purchased the app so I could run it on my phone and the 15c wouldn't have to leave my desk. Straight to the point: Last night I was trying to solve this equation below (for V): $P = \frac{RT}{V-b}-\frac{a}{V(V+b)\sqrt{T}}$ where Code: P = 56 T = 450 R = 0.08206 a = 85.6349 b = 0.0259 This is part of the subroutine I used: Code: LBL B RCL 7         (b) + * RCL 2         (T) SQRT * RCL 6         (a) / 1/x CHS x<>y RCL 7         (b) - RCL 5         (R) / RCL 2         (T) / 1/x + RCL 1         (P) - RTN While the actual calculator struggled to find the root (which was my fault at first because I had not given it good guesses), the app crashed very shortly after it started the calculation. The best guess is RT/P = 0.6594 If RT/P and 1.1 RT/P are used as guesses, there is a good chance the app will crash, as it has happened before a couple of times. BTW, the root is 0.5698 (86.41% of RT/P). I also got it to run the benchmark test as posted here. The app ran for 8 minutes, froze and then crashed. Marcio RE: [HP-15C] Android version display weird behaviour? - emece67 - 11-23-2015 03:59 PM (11-23-2015 02:20 PM)Marcio Wrote:  Well, I had never paid much attention to the crashes before because I usually use either the 50g or 15c to solve problems, the 50g when it requires more processing power or more memory for large matrix operations. Most recently, I purchased the app so I could run it on my phone and the 15c wouldn't have to leave my desk. Straight to the point: Last night I was trying to solve this equation below (for V): $P = \frac{RT}{V-b}-\frac{a}{V(V+b)\sqrt{T}}$ ... While the actual calculator struggled to find the root (which was my fault at first because I had not given it good guesses), the app crashed very shortly after it started the calculation. ... I also got it to run the benchmark test as posted here. The app ran for 8 minutes, froze and then crashed. Checked this problem with go15c in my Android phone. It does not crash, but can report error 0/8 depending on initial guesses. With good guesses it arrives to the right solution. It takes a while (speed x1) or instantaneously (speed max). The N-Queens bechmark also works, this time up to 128x speed. I see no point in using the HP app when you can use the goxx series of apps. Way better IMHO. Regards. RE: [HP-15C] Android version display weird behaviour? - Marcio - 11-23-2015 07:58 PM It seems the HP-15C Android app by HP is not very popular among users of these forums, huh? I do agree it's overpriced and the fact that much cheaper apps are bug-free is not very easy to understand (for me at least). Even the size of the non-HP apps are way smaller. Oh well. Thank you all for your inputs. Marcio RE: [HP-15C] Android version display weird behaviour? - Tim Wessman - 11-23-2015 09:31 PM (11-23-2015 07:58 PM)Marcio Wrote:  Even the size of the non-HP apps are way smaller. Usually because they don't ship documentation I think.