Code Maintenance & Programming Rules

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 This guide outlines essential best practices spanning code style, architectural design, debugging, testing, performance, and portability—all aimed at reducing the long-term cognitive load of code maintenance. 🎨 1. Style Code is written for humans to read, and only incidentally for computers to execute. Variable Naming : Use descriptive names for global variables, and short names for local variables. Precision and Consistency : Use active names for functions (e.g., calculateTotal ). Above all, keep your coding style consistent throughout the project. Structure & Expressions : Use a consistent indentation and brace ( {} ) style to show program structure visually. Use the natural form for expressions. Use parentheses to make the semantics unambiguous. Break up overly complex expressions to keep them clear. Side Effects & Macros : Beware of functions with side effects. Avoid function-like macros; if unavoidable, parenthesize the macro body and arguments carefully. Magic Numbe...
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First NDS Programming Project: hello nds

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div>此篇文章介紹如何在 Windows 系統上建立 Nintendo DS 的遊戲程式開發環境。
This post introduces "how to setup Nintendo DS game programming development environment on Windows".

步驟一：安裝 devkitPro
Step 1: Install devkitPro


安裝方式可參考此影片
Watch this video to install devkitPro

在選擇 Choose Components 時，請將 NDS Development 勾選。
Check the NDS Development in "Choose Components" window. 


步驟二：下載模擬器與韌體
Step 2: Down DS emulator and firmware

DS的模擬器有好幾款，而筆者選用 melonDS ，下載解壓縮即可。
There are serveral emulator for NDS. We could choose melonDS. Just download it and extract it.





步驟三：設定 melon DS
Step 3: Setting melon DS
開啟 melon DS，選擇 Config --> Emu settings
Run melon DS and open Emu settings (Config --> Emu settings)



在 DS-mode 分頁選擇 DS ARM9 BIOS、DS ARM7 BIOS、DS firmware檔案路徑。
Choose DS ARM9 BIOS, DS ARM7 BIOS, DS firmware binary files in DS-mode tab.



步驟四：編譯 hello world 範例
Step 4: Building hello world example
開啟 MSys2(以Windows 10 為例，在開始 --> devkitPro --> MSys2)。 
Open MSys2(Start --> devkitPro --> MSys2 on Windows 10)

切換至範例所在資料夾的指令：
Change folder to "hello_world" example command:
cd /c/devkitPro/examples/nds/hello_world

編譯並產生執行檔的指令：
Building it command:
make

成功時可看見 built ... hello_world.nds 執行檔。
The binary file is ready when we see "built ... hello_world.nds".

步驟五：模擬器測試
Step 5: Testing on Emulator
開啟 melon DS，選擇 File --> Open Roms
Run melon DS. Click File --> Open Roms

Emulator Demo Video:

步驟六：實機測試
Step 6: Run it on NDS device
See https://dsi.cfw.guide/sd-card-setup.html to set up a SD card.
Then copy "hello_world.nds" to SD card.

On DS device Video:


References:

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