Prompt it · Claude writes BASIC · a Mattel Aquarius runs it

Aquarius

Z80 · 1983

Click the screen to type. In a cartridge game: arrow keys = move, Space = fire. Double-click for full screen.

Load a game & swap ROMs

.caq loads as a tape (CLOAD + RUN); .bin/.rom inserts as a cartridge ($C000, auto-boots); a TOSEC .zip is auto-extracted. Reset ejects a cartridge.

Swap the BASIC (8–12K) or character (2K) ROM — loads and reboots instantly.

Studio

⌘/Ctrl + G
⌘/Ctrl + ↵

Settings

The key is sent to your local proxy and held in its memory only — never written to disk or kept in the browser. Restarting the proxy clears it.

My apps

Everything you save lives here. Load one to keep iterating on it.