Both CASIO fx-9750GII and CASIO fx-9860GII use the same SH4A CPU. Therefore the old firmware of the fx-9750GII (02.02.xxxx) can be replaced by the newer firmware of the fx-9860GII (02.02.0201). This allows users of the fx-9750GII to enjoy the new features, that come with the firmware update, such as MathView.

1. Preperation

This article describes procedures to flash the CASIO fx-9750GII. All actions taken are at your own risk. I take no responsibility for any damaged hardware.

1.1 Supported Versions

02.02.xxxx

You can find your current version under SYSTEM -> F4 -> Version OS

1.2 Required Software

Flash Tool & Firmware (Chinese Forum with an Account needed)

CASIO Driver (CASIO FA-124 Software)

1.3 Backup

  1. Make shure, that the Calculator is set to “USB” in the LINK menu
  2. Connect Calculator to PC (FA-124 must already be installed)
  3. F1 “DataTrans”
  4. Open fxRemote.exe
  5. click “Backup Flash” and save the file
  6. If everything went right the console should read “Checksum OK”

2. Flash

  1. Turn off the Calculator (don’t disconnect!)
  2. Press the RESET-Button on the back of the Calculator with a pencil
  3. Press “F2”, “4” and “AC/ON” while still holding the RESET-Button
  4. Release the RESET-Button
  5. Keep the other Buttons pressed for 3-4 sec. and then release them
  6. Press “9” for 1 sec.
  7. Press “x” (Multiplication) for 1 sec.
  8. The screen should look like this:
1
2
OS ERROR
Please update OS.

The Calculator is now in Flashmode.

  1. Open fxRemote.exe and click “Recover Flash”
  2. Select 2_02_0201_sh4.fls and wait
  3. Close the next two windows with “OK”
  4. Now the program should flash

The Calculator restarts, as soon as the progress is finished. Dismiss all upcoming messages.

Now following things should be diffrent:

  • The OS Version should now be 02.02.0201
  • There are two new programs: “e-ACT” and “S-SHT”
  • Under “Shift”+”SET UP” you can change the “Input/Output”-Setting
  • You can now install 1,5 MB of Plug-Ins with FA-124
Should the Calculator crash after the first start, just press the RESET-Button