I have released a new application for casio fx-9860g series. It is a text editor.
You can find it here: TEXT EDITOR FOR CASIO FX-9860G

I tried to upload here in this website also but it was tricky to get the filename correct.
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TEXT EDITOR FOR CASIO FX-9860G SERIES v.1.0 - 24.11.2008
By Diego Marin (dmarin75 AT yahoo.es)
This program is a text editor for Casio calculators fx-9860g series. It has the following main features:
- Text editor with changeable font size. You can edit text in the standard 21 lines x 8 columns font, or 32 columns x 10 columns font, plus other two in the middle.
- Integrated file explorer for rename, copy, move o delete files in storage memory or SD card.
- Integrated help screen.
- Text edition functions: clip,copy,cut,paste
- Search string within text
- Insert any ASCII char not accesible by the keyboard.
- Setup screen to customize several options.
Below is the function reference that is also embedded in the application.
It has a limitation due to the available memory in the system. The largest file that can be loaded is 16Kb in size. If you load files bigger than that the contents of the file is only displayed up to the first 16Kb, the rest is not loaded, and will be truncated if you save the file again with the same name.
Only text files can be edited. If files that contain characters outside of the "text" range, below ascii 32 and over ascii 127, file will be opened in binary mode. In this case you can not modify the file, unless you save it with another name. This feature prevents system files to be modified by accident.
I hope you enjoy this work.
Diego Marin, 2008