Contents:
Home
Author's Note
Whats new (3.00)
Features
Compatibility
Download
English Manual
German Manual
Installation
Screenshots
Why?
Version History
Users Comments
Credits
Legal
English
Deutsch
French
Italian

dCalc is an RPN (Reverse Polish Notation) calculator as
popularised by HewlettPackard.
Like the HP calculators it operates much more intuitively than
calculators with an equals sign but on the Psion it provides much more
information including the whole stack and graphing function.
 Major modes:
 Financial mode  compound interest, present value, final
value, interest, number of payments etc  these all work in the same
way as in the HP calculators. Anuities can be set for the start or the
end of the compounding period. Days between dates.
 Scientific mode  Sin, Cos, Tan, Sinh, Cosh, Tanh, log, ln,
etc and their inverses
 Statistics mode  Sum, Sum, mean, std dev, factorial,
Permutations & combinations, Linear regression
 Programming mode  Bin, Oct, Dec, Hex, Ascii and Internet
Address (IP) displays. AND OR NOT MOD and shift operations. Prime
factors.
 There is a full set of unit conversions including
 length  mm, cm, m, km, in, feet, mile, nautical mile etc etc
 area  acre, hectare, sq. m, sq. mm, sq. in., sq. foot etc etc
 volume  gallons, pints, litres, cu. m, cu. feet etc etc
 mass  kg, pound, ton, tonne, gram etc etc
 speed  kph, mph. ft/s, m/s etc
 fuel consumption  mpg, litres/100 km
 pressure  atmospheres, mmHg, pounds/sq.in., Pascals etc
 temperature  centigrade, fahrenheit, Kelvin
 currency  up to 36 currencies of your choice
 Programmable keys  5 keys (f1f5) can be programmed by the user to
execute the Psion's native OPL language which is similar to
Basic. Thus you can create your own keys with your own labels
e.g. "R100", a key to generate pseudo random numbers from 0100 (OPL
code is "100*RND")
e.g. "%" a percent key by putting "y*x/100" into a function key
 The NR key provides a NewtonRaphson iterative (numerical)
solution for functions. All you need to do is put the function and its
derivative (dy/dx)into the f4 and f5 programmable keys
(marked f(x) and f'(x) and press the NR button. If a
solution converges in a reasonable time it is put into X.
 Graphing of (X, Y) functions is builtin with control of axes
and labelling and up to three functions on one plot. Plots can be
exported to other applications.
 It features nice big clunky keys (easy to hit) and a nice big
display (easy on my presbyopic eyes).
 dCalc has a full set of stack manipulation keys (Roll,
X<>Y, Enter, Sto, Rcl) which are so essential to the effective use
of an HP calculator.
 It interoperates well with other Psion programs using the
builtin copy and paste functions (^C and ^V shortcuts as
normal).
 dCalc operates on real numbers with Scientific, Statistics and
Financial functions or 32bit integers (for programmers).
 The precision in Scientific, Financial and Statistics mode is the
full precision of the Psion  about 15 significant places of decimals.
 As well as the stack, which is always visible (a nice plus over an
actual HP calculator) there are 10 integer and 10 real registers to
store numbers.
 All your numbers and settings are saved between sessions
 English,
French,
Italian and
German languages are supported
