|Re: 42s and 15c|
Message #7 Posted by Vieira, Luiz C. (Brazil) on 4 May 2004, 12:32 a.m.,
in response to message #1 by V. Taylor
I see others have already found their words to express what is between both HP15C and HP42S. I guess that we can all add one or another extra information, because they are so many. I think I can post about a lot of them: plenty of memory "space (standard 8KBytes, upgradable to 32Kbytes or 64KBytes) IR output, control and system flags, enhanced programming with ALPHA labels instead of keycodes, menu-driven (I like it very much, although some users hate it), variables AND numbered registers, enhanced statistics with standard four curve fit plus BEST (auto setting for best correlation coefficient), full dot-matrix LCD with graphics capabilities (I never understood why some guys mentioned the HP42S is not a graphic calculator... if graphics can be drawn in the display, why isn't it graphics?). About math capabilities, Eric Smith mentions a very important difference between them both: the complex matrices. The fact is that when the HP42S is dealing with complex matrices, it uses half the number of registers needed in the HP15C to accommodate the same data in order to perform some complex matrix operations. Yes, the HP15C arrangement is clever, thoughtful, a true brainy accomplishment. I'd be proud of working with the team that developed the HP15C firmware. Ï remember that once I measured how much each matrix uses of the HP42S available memory and, as expected, matrices have a different scheme of memory usage. I took some (hand written) notes but I cannot imagine where are they (time to start again or look for this information somewhere), so I cannot see a way to compare memory usage in this case.
I just would like to add that I own each of both, and I like very much using each of them. Heavy duty work with the HP42S (faster and with more memory), but for daily enhanced tasks, I see no other better and easier as the HP15C.
Wow! Too much words, not so much additional information. But I hope these posts actually help you finding your own answer.