Hello,
I've wrote a simple sciencetific rpncalc, wich I wan't to build up to a mathtool exactely fitting my needs. It is not nearly as powerfull as for example, the wonderfull "Free42" HP42s simulator, but it has really big buttons and so one can type on it very fast, without mistakes. In the future, I would like to implement programming and graphing capabilitys  F2key has no funcktion for now, but you can store and recall up to 10 vars and on F1 there are some sciencetific functions  most of the BASIC4PPCbuilt in math functions.
Short explenation about rpn: if you want to add 2 and 3, you type 2 ENTER 3 + instead of 2+3= on an algebraic calc. For now it is not possible in my progy to type 2 ENTER 3 ENTER + , like in traditional rpncalcs, cause the last enter would push 3 into stacklevel 2 and operations will only be done with stacklevel 1 and 2. But the normal working sheme with rpn is not to press enter after the last argument, i think, so this should be no problem. You can do more complex calculations like (2+3)*4 in the form: 2 ENTER 3 + 4 * wich saves a keystroke in comparison to algebraic.
A short description for the special buttons:
ENTER  Push's the Stack one level upwards.
SWP  Exchanges stack level one and two
Up  pulls the stack  begins with level two so level one stays untouched  (somewhat special, like a history function)
Back  Like Backspace
F1  Sciencetific functions
F2  Not used for now
STO  Press STO and then button 09 to save Stack level one
RCL  Press RCL and then button 09 to recall stored value into stack level one
F1  VAR  Lists the stored values 09
I've wrote a simple sciencetific rpncalc, wich I wan't to build up to a mathtool exactely fitting my needs. It is not nearly as powerfull as for example, the wonderfull "Free42" HP42s simulator, but it has really big buttons and so one can type on it very fast, without mistakes. In the future, I would like to implement programming and graphing capabilitys  F2key has no funcktion for now, but you can store and recall up to 10 vars and on F1 there are some sciencetific functions  most of the BASIC4PPCbuilt in math functions.
Short explenation about rpn: if you want to add 2 and 3, you type 2 ENTER 3 + instead of 2+3= on an algebraic calc. For now it is not possible in my progy to type 2 ENTER 3 ENTER + , like in traditional rpncalcs, cause the last enter would push 3 into stacklevel 2 and operations will only be done with stacklevel 1 and 2. But the normal working sheme with rpn is not to press enter after the last argument, i think, so this should be no problem. You can do more complex calculations like (2+3)*4 in the form: 2 ENTER 3 + 4 * wich saves a keystroke in comparison to algebraic.
A short description for the special buttons:
ENTER  Push's the Stack one level upwards.
SWP  Exchanges stack level one and two
Up  pulls the stack  begins with level two so level one stays untouched  (somewhat special, like a history function)
Back  Like Backspace
F1  Sciencetific functions
F2  Not used for now
STO  Press STO and then button 09 to save Stack level one
RCL  Press RCL and then button 09 to recall stored value into stack level one
F1  VAR  Lists the stored values 09
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