📝 NES Code Editor

Auto-generated symbols available to your code

Every time you press Play, the server regenerates two headers from whatever you built on the other pages:

load_background() (from graphics.s) copies the auto-generated .chr and .nam into PPU memory. You only need to call it once, before enabling rendering.

📝 Code page — help & shortcuts

Edit main.c (or main.s in Asm mode) and press ▶ Play in NES to compile + run. In Guided mode only the highlighted lines are editable; switch to Advanced to edit freely.

Keyboard shortcuts

Buttons

• 🎓 Guided / ⚙️ Advanced — lock or unlock the rest of the file.
• C / Asm — swap between main.c and main.s (each has its own autosave).
• 📚 Lesson — load a starter program for a specific lesson; keeps your current work as a snapshot.
• 🧩 Snippets… — paste a pre-written block at the cursor. Guided mode only allows snippets that fit the current region.
• ⌨ Symbols… — see every auto-generated name your code can use (tiles, palettes, NPC helpers, etc.).
• ↻ Restore default — swap in the stock platformer starter. Your current code is snapshotted first.