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The following list was written by user202729 and serves as the guide to this forum thread.

Tutorial about ROP.

Javascript code to help with writing hackstring.

Character map image. Alternative version. Also available in the Javascript code above.

Scrolling text demonstration with video.

Calculator font.

How to enter a hackstring (991ES+) (less detailed version)

Hackstring used to dump the ROM. No longer needed now as we already have the ROM.

Datasheet contains some information about the hardware.

Hardware description: Part 1, part 2.

  * KI/KO ports (keyboard).
  * Timer: Part 1, part 2.
  * LCD screen.

Variable byte representation (no English translation this time).


High-level functions:

  * getkey

There are some outdated information about "real address" and "emulator address". Now we had the real ROM of the calculator that is not necessary.

The Fx-9860gii SDK uses C by default (it also supports C++, SH4A and SH3 ASM), the SDK just uses the standard C with some extra functions for I/O and drawing. 

In the "fxlib.h" header file, there are a bunch of Bdisp functions, these functions deal with drawing pixels to the screen and clearing them.

e.g Bdisp_PutDisp_DD() is the function used to draw a pixel to the screen and Bdisp_AllClr_DD() is the function used to clear all the pixels from the screen.

There is a good tutorial created by Fez and reformatted by Helder7 about the Bdisp functions and basic I/O over here: http://www.casiopeia...php?f=20&t=1420

You can also download the official Casio docs on the fxlib library over here: http://edu.casio.com...greement.html#2

Here is a hello world program, most of this is auto-generated by the SDK when you create a new project:

/*****************************************************************/
/*                                                               */
/*   CASIO fx-9860G SDK Library                                  */
/*                                                               */
/*   File name : [ProjectName].c                                 */
/*                                                               */
/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
/*                                                               */
/*****************************************************************/

#include "fxlib.h"

//****************************************************************************
//  AddIn_main (Sample program main function)
//
//  param   :   isAppli   : 1 = This application is launched by MAIN MENU.
//                        : 0 = This application is launched by a strip in eACT application.
//
//              OptionNum : Strip number (0~3)
//                         (This parameter is only used when isAppli parameter is 0.)
//
//  retval  :   1 = No error / 0 = Error
//
//****************************************************************************

int AddIn_main(int isAppli, unsigned short OptionNum)
{
    Bdisp_AllClr_DDVRAM();          // clear screen
    PrintXY(1,1,"Hello World!",0);  // print "Hello World!" to the VRAM
    Bdisp_PutDisp_DD();             // copy pixels from the VRAM to the actual display
    return 1;
}




//****************************************************************************
//**************                                              ****************
//**************                 Notice!                      ****************
//**************                                              ****************
//**************  Please do not change the following source.  ****************
//**************                                              ****************
//****************************************************************************


#pragma section _BR_Size
unsigned long BR_Size;
#pragma section


#pragma section _TOP

//****************************************************************************
//  InitializeSystem
//
//  param   :   isAppli   : 1 = Application / 0 = eActivity
//              OptionNum : Option Number (only eActivity)
//
//  retval  :   1 = No error / 0 = Error
//
//****************************************************************************
int InitializeSystem(int isAppli, unsigned short OptionNum)
{
    return INIT_ADDIN_APPLICATION(isAppli, OptionNum);
}

#pragma section

As you can see from above, there is no main() function, unlike standard C our entry point to the program isn't the main() function, it is the AddIn_Main() function.

The Mandelbrot fractal is quite a sight.
Such wonder and amazement that can be found while viewing the Mandelbrot fractal can now be had on the Casio Prizm graphing calculator.
In addition this program can also be compiled for the PC assuming SDL is installed.
Just run make and it will be up and running.
There is very little difference in function between the PC version and the casio prizm version, the resolution is higher but that is it.

The controls are
Left, right, up, down moves the window in that direction
Menu key or ESC on the PC, exits to the menu or exits the program (PC)
F1 sets maximum iterations to 65535
F2 sets the maximum iterations to 224 (this is the default upon starting the program)
F3 toggles deep mode which is on by default. This means you can zoom in deeper with a slight performance hit.
I do not notice the difference
1 subtracts one from the maximum iterations
2 adds one to the maximum iterations
3 subtracts ten from the maximum iterations
4 adds ten to the maximum iterations
5 subtracts 100 from the maximum iterations
6 adds 100 to the maximum iterations
Shift zooms in
Alpha (ALT on PC) zooms out
Source code https://github.com/C...-Prizm-Explorer
Binary https://github.com/C.../mandelbrot.g3a
Screen shots (from the PC version which gets very similar output differing only in resolution).


Anyways if you have any bug report(s), feature request(s), pull request(s), patch(es) or whatever relates to this I would be happy to hear about them.

Name: Daniel, just call me Hyuji.

Birthday: 15 Feb

Age: 17(For now...)

Hobbies: Biking, Video Games (RPGs), Anime & Manga, Mathematics, Computers, Music(Rap)

Where you got your username: I'm lazy so I just took some grouped letters on the keyboard, that made sense, into a username. If you look on a QWERTY keyboard, you will see the letter H-Y-U-J-I all grouped together for easy typing. My password follows a similar principal.

@SopaXorzTaker Sorry I forgot to mention that the ROM is of fx-570/991SP X emulator, its language is not English. Perhaps I will send you an English version (not on this site)

On this site there are two images of calculators with checksum.

EDIT too bad that those do not have emulator.

@kaikun97 Can you delete the video in your quote? It has a lot of Casio calculator emulator which may be copyrighted.

Hi, yesterday, I was bored and I've programmed a Conway's Game of Life port to fx-9750GII (hacked or not), fx-9860G and fx-9860GII.

Code in pdf from FA-124: 

https://drive.google...RDdCTHlMaXVkZkU

It is programmed in Casio Basic 2, and I use a 20x20 matrix filled in start with random binaries. You must have at least 45min to play it and enjoy viewing how this little universe evolves.

It is programmed from scratch and it is very slow. If you have any idea for making it more fast, please, feel free to post

Installation:

1. Create a program in the calculator
2. Transfer it to FA-124
3. Copy the pdf content in the program and save it.
4. Overwrite it to the calculator

I just use the sprintf function, (which is in the stdio.h lib, also sidenote: the printXY function is from the fxlib.h lib) to convert the float into a char array and then print it to the screen.

Here is an example function:

void printFloat(int x, int y, float f){
    unsigned char buffer[9];
    sprintf(buffer, "%f", f);
    PrintXY(x,y, buffer, 0);
}

and here it is in use:

int AddIn_main(int isAppli, unsigned short OptionNum)
{
    float pi = 3.141593;            //the float we're going to print
    Bdisp_AllClr_DDVRAM();          //clear screen
    printFloat(1,1,pi);             //call the function to print the float
    Bdisp_PutDisp_DD();             //put pixels from VRAM onto the screen
    
    while(1){}
    return 1;
}

Does anybody know how to get gray-scale pixels on SH4-type fx-9860gii model calculators.

I've read that Kucalc got it working back in 2007 but that only for sh3. I know C and C++ but I don't know how to write assembly.

The Casio fx-9860 model series only has a monochrome LCD, therefore it can only display pixels in black and white, but a lot of people found ways to emulate tones of gray(gray-scale) on the LCDs.

You have to switch the pixels on and off at a high frequency to trick our eyes to see gray. A darker gray can be achieved by displaying the black pixels for a little while longer.

I've already tried doing this in C, but the flicker speed is not even close to the speed needed to achieve a gray looking pixel.

I know it's possible because people have already done it for the 9860G, and they also achieved gray-scale on the TI-83+ using the same technique.

I've seen it used in Doodle Jump and Mario Land CE and it looks awesome. Games look so much better with gray-scale.

Please reply if you have any information/comments about gray-scale on the SH4-type CPUs.

Ok, so this is a pretty simple thread, bassically the computer I had the 9860 sdk on died, along with the hdd, and now I cant find where I got it from casio's website.
If anyone could link me to a download (from casio or otherwise), that'd be supurb.

Thanks.