#Eigenmath casio install#
#Eigenmath casio update#
#Eigenmath casio portable#
#Eigenmath casio software#

Here's some proof of being able to write to the VRAM and a slightly broken GUI demo (which I've since fixed) So my battle has been sorting through functions in the firmware, finding which are actually useful/won't break the calculator and then documenting them to the best of my ability.Īt the moment, I am able to write text to the screen (through functions used in the debug menu/unrecoverable system errors), write directly to the VRAM (set the value of pixels and refresh the LCD), get input (key and touch events) - albeit in a slightly broken way, and do some very minimal GUI stuff. As such, system functions are called directly by their address. Since the calculator doesn't seem to support any type of add-on, it appears to lack a syscall interface. This gives me a super easy way to write some code, put it on the calculator, and run it, without having to reflash the whole firmware (which takes >5 minutes.). At the moment, when the Imaginary Unit menu option is pressed, a file run.bin is loaded from the calculator's flash, placed into a (I think) unused section of RAM, and jumps straight to it.

This isn't really that important - it's just because it was somewhere I knew the function wouldn't get called when I didn't want it to, and didn't get in the way of any other important OS functions. Right now, I've placed this in the System app, under the System > Imaginary Unit menu in the menu bar at the top.

#Eigenmath casio install#

Since the calculator lacks any sort of add-on feature, it's first necessary to install a small code stub somewhere in the firmware which can load an executable file into memory and run it.

Now, onto the progress I've made at developing some sort of SDK for the calculator. Hacking the fx-CP400 - Part 2 (Exploring the Firmware) Hacking the fx-CP400 - Part 1 (Getting the Firmware) They're below if you want to have a read. If you haven't seen them already, I made a couple blog posts on dumping the firmware and adding a small proof-of-concept modification to show arbitrary code execution. This is after I've managed to achieve code execution on the calculator after dumping the firmware and adding a small stub to allow me to run code in a file placed on the calculator's USB storage (the one that appears when you press 'USB Flash' when a USB cable is plugged in).

#Eigenmath casio update#

Unfortunately, no recent updates have been made.Just wanted to post a bit of an update on my progress in developing an SDK for the CASIO fx-CP400.

#Eigenmath casio portable#

We have not experienced any issues during our evaluation Portable Eigenmath did not freeze, crash or display error dialogs. complex, polynomial, linear, circular, exponential). The straightforward program requires a low-to-moderate amount of system resources, is very responsive to keyboard commands and mouse events, and includes a Help menu for the functions it supports (e.g. In addition, you can use the undo, redo, copy and paste functions, copy the current display to the Clipboard, create a script from the command history, as well as save the script to file for further processing. So, you can write various mathematical expressions, draw a Cartesian coordinate system, calculate the float or integral value, as well as find out derivatives, among others.Įditing the script can be done at any time. The interface of the program is based on a standard window with a plain layout. Moreover, no items are left behind in the Windows Registry or on the hard drive after program removal. Thus, you can carry Portable Eigenmath in your pocket whenever you're on to go (e.g. Since Portable Eigenmath does not come with an installation package, it is possible to store it on an external device (like a USB flash drive), in order to run its executable file on any computer.

#Eigenmath casio software#

It can be easily figured out, even by users with no experience in software programs. Portable Eigenmath is a lightweight application that can help math students or casual users who frequently work with mathematical equations, by providing them with the necessary tools for seamlessly writing complex expressions.