A61 I've got this problem: In RPN: 1 3 / (i get 1/3 on stack) 2 5 / (i get 2/5 on stack) And I get 1/3 + 2/5 (And I want to have 2/15) I must type EVAL to calculate this. Is there any flag or something to do this automaticly ??? ==== No. ==== I am trying to port A. Moy's Starplotter to the 49G v 1.18 and think (hope?) that all I now need is the address of the special memory area that holds the PICT grob or a ptr to it. The relevant code on the 48 looks like this; DO=(5) #1263C @unsupported entry C=DATO A @#806DA ptr to adrss of PICT grob? DO=C C=DAT0 A @#80E4A adrss of PICT grob? ==== I wonder if it is a known bug, but... why can't I create a directory in port 2? ==== I had a little different idea : to write a RPL server, using Usinagaz, so that anyone on Internet can connect to my calc & work on it ! Samuel Thibault -- -- Sounds like the Iomega Zip and Jaz drive scam they pulled off several ==== You could me mad, but having a PocketPC and a hp49, I would like to connect them to send files between them. Any suggestions? I've seen some info about hacking a serial cable in: there should be out there plenty of sofware for XMODEM and KERMIT for pocketpc. there are tons for winCE. they may be free!. you would need a cable with the db9 ==== this is a bit trivial, but I hope it still may help some people. Sometimes it's useful to have decimal numbers converted to an integer plus a fraction. For example you might rather have ==== Improvement for the HP48 or HP49: Improvement for the HP49 only: Note that all of these ab0ve suggestions leave something to be desired for negatives of improper fractions. For example, '-98/11' becomes '-8+-10/11' rather than the more desireable '-(8+10/11)' Consider, for application to arbitrarily signed improper fractions, for both 48 or 49 or, for the 49 only, Only a few reasons, One: The single line display of the 32s is a larger size to read vs the two line display of the 42s. Second: Unit conversions are built in and on the keypad vs using the solver of the 42s. If you use these fundamental conversions often, you will like the 32s. Third: Fractions, if you work as a carpenter and use the english measurement system, or a similiar reliance on fractions, the 32s does ==== If you are entering matrices with the Matrix Writer, one of the If you want to produce the sort of material that you mention then you are going to have to work in assembly level sRPL instead of the user programming language uRPL mentioned in the manual as it is so much faster and more powerful. Unlike the HP48/49 the HP40G is not set up to do this directly - you have to develop the app on another platform and transfer. All the really good games available for the HP39/40G are done like this. The most knowledgable people I know of aplet frame available on his site to which you can attach your code) and Lilian ==== Um, there is an HP4x emulator available for both Windows (laptops) and WinCE devices now. I use both versions, with a 48 rom image, but I think ==== So if they consider statistics, they will probably have Windows as basis of it. Please see http://v1.nedstatbasic.net/s?tab=1&link=5&id=347091 and you can see the results below, for people that visit AREA48.com. 1. Windows 98 47.3 % 2. Windows ME 25.5 % 3. Windows 2000 10.9 % ==== I find it very disheartening to see the calc division slowly being dismembered. For example, one of the early casualties has been Charles Lim, who headed the project in HP Melbourne which resulted in the HP39/40G. Charles, of course, is quite happy to go on to bigger and better things, but for the rest of us we seem to be presiding over the slow death of a friend. Symptomatic is that the broken links on HPs web site to the aplet/e-lesson libraries for the HP38G, HP39G & HP40G have still not been repaired despite being reported to the web administrator a long time ago. Since access to aplets is absolutely central to using these calculators to their full potential, one has to question whether they are going to receive any support at all in time to come. Indeed I wonder how much longer they are even going to be manufactured. -- Colin Croft Old mathematicians never die; they just lose some of their functions. ====================================== Applications in Mathematics ccroft@iinet.net.au ==== Linear Interpolation is what I'm looking for. Problem's like: ==== If all you want to do is convert from any number base to any other then I program to do that. However it does nothing more with it than convert and the method used is incredibly clumsy due to the limitations of the language that you've already discovered. You might be able to enlarge it to perform operations on the results too. See the link on my page (http://members.iinet.net.au/~ccroft) to The First ==== I went to school the next day and found myself coping with students in tears. We may be in Australia but we're with you in spirit. I was pleased that our Prime Minister has pledged support. What worries most of us is how the US is going to react. We all understand how you must feel - God knows I would find it hard not to hate and not having an specific enemy in sight must make it very hard not to direct that hate at an entire ethnic group. Please try to remember that the vast majority of islamic groups and countries are not the evil animals that produced this despicable crime. -- ==== One really great place to start is the HP 48G Series Advanced User's Reference Manual. I know it a really big book (compared to all the 49's documentation combined), but the point is if there was ever any good documentation for the 49 in the first place (which people have been griping about all along), you would not be up to project. What I would really like to see is an Advanced Programming for Dummies manual that helps one advance from UserRPL to beyond (basically advanced programming for non-EE/CS types). Greg aimed ==== Sorry, my comment was poorly phrased. To rephrase, the 48G has numeric integration of a rather sophisticated kind. I probably wouldn't be so disappointed with the lack of numeric differentiation if it lacked numeric integration. Dan