Andro12C: the financial calculator for Android
Andro12C uses the same engine of the time-proven HP 12C Web emulator. It aims to mimic all features (and limitations) of the real device.
Characteristics
Differences from real calculator
Terms of use
Support
Characteristics
The emulator mimics the 12C calculator as closely as practically possible, including details such as rounding up of n in financial calculations. It shares the same limitations as an original 12C: only 99 programming steps, 20 memory positions, etc.
Many emulators offer an ancilliary screen to query the contents of financial and statistical registers, and/or programming opcodes. Not this one :) The access interface is strictly the one you have in the real 12C.
Actually, if you find any discrepancies in relationship to a real unit, and they are not mentioned in following section, chances are you found a bug and I kindly ask you to report it.
Differences from real calculator
First of all, it is important to mention that the emulator engine does not use a ROM dump. It is a clean-room implementation, based mainly on calculator's manual plus experimentation. So the results simply can not guaranteed to be exactly equal.
The main interface deviation is the ON key, which toggles between decimal point and comma, and can't turn off the emulator. (In the real 12C, you do this by turning on while pressing decimal point.)
Other known deviations:
- Calculations use 15-digit precision (related to C's double type), so there can be minor rounding differences in comparison to a real unit.
- Minus sign in LCD emulation looks different.
- Speed is obviously different; generally the emulator is much faster.
- You can use all programming steps and all STO positions at the same time, while in the real unit they share the same memory and there is a tradeoff.
- Footer elements like BEGIN, RUN, PGRM etc. occupy different positions.
- Also, there is a slight augmentation in footer elements. For example, RUN shows the program step, STO-operation shows operation symbol and so on.
- Execution of programs may have a different speed and actual calculations are shown instead of "Running...".
- Self-test features like turning ON with certain key pressed are (naturally) absent.
Terms of use
The emulator is offered "as is". There are no guarantees of precision, exactness, or aplicability to any given purpose. The developer has no responsability for any damages incurring from usage of this software.
This sounds scary, but it is actually the usual conditions for most software and even hardware (including calculators!). Always double-check results against other sources if you are going to take some actual financial decision!
Support
You can use the Market support tools, or the comment section at this page, or contact me by e-mail if you have any issues or feedback.
