NOTES — Casio fx-CG50 Notes Browser Add-in

NOTES — Casio fx-CG50 Notes Browser

A read-only .txt notes browser add-in for the Casio fx-CG50 (Prizm) graphing calculator. Browse folders, read notes with markdown-like formatting, and search across all files — all using the calculator’s built-in keys.

Repo layout

source/       Build environment, source code, tools, tests
calculator/   NOTES.g3a app file, ready to copy to your calculator
README.md     You are here

Install

Copy calculator/NOTES.g3a to the calculator’s @MainMem\ folder (via FA-124 or USB mass storage).
Create a folder called NOTES in \fls0\ on the calculator and put your .txt files in it.
Launch NOTES from the Main Menu.

There is an empty calculator/NOTES\ folder ready for you to fill with your own .txt files. Only .txt files are supported. Organise them into subfolders however you like:

\fls0\NOTES\Maths\Pure\integration.txt
\fls0\NOTES\French\vocab.txt
\fls0\NOTES\CS\FloatingPoint\examples.txt

Controls

File browser

Button	Action
`UP` / `DOWN`	Move selection
`EXE` or `F1`	Open folder / file
`F2`	Search all `.txt` files
`F6` or `EXIT`	Parent folder
`MENU` or `AC`	Quit

Text viewer

Button	Action
`UP` / `DOWN`	Scroll line by line
`LEFT` / `RIGHT`	Horizontal scroll (unwrap wide lines)
`F3`	Page up
`F4`	Page down
`F1`	Next search match / next page
`F2`	Previous search match / previous page
`F5`	Find text in current file
`F6` or `EXIT`	Back to file browser

Features

Markdown formatting: headings (#–####), bullets (- / *), numbered lists, blockquotes (>), horizontal rules (---)
Word wrapping: ordinary prose wraps at word boundaries
Preserve mode: code-like lines (long unbroken strings) display unwrapped; press RIGHT to shift view horizontally, LEFT to shift back
In-file search (F5): case-insensitive, highlights matches, F1/F2 to jump between hits
Search all files (F2 in browser): scans filenames, folder names, and file contents; results ranked by relevance (name match > content match > more hits = higher)
Search history: last query is remembered; UP/DOWN in the search box recalls past queries
Long filenames: auto-scroll marquee in the title bar
File limits: 16 KB per file, 768 displayed lines, 64 search results
System file filtering: ignores .DS_Store, ._*, .Trashes, etc.
Alphabetical sort: folders listed before files

Build from source

./source/compile notes

Requires Docker. See source/tools/docker/Dockerfile.notes-source for the cross-compiler image.