Symblicity

Try Symblicity with zero setup.

The browser VM implements the same registers, memory, stack, directional control flow, and audio opcodes as the native C interpreter. Browser audio replaces FFmpeg/ffplay.

\> Play Battleship Example Run Stop Step Reset Open .sym Save .sym Ready

Source Tabs start comments | spaces are executable

Terminal Click here, then use keyboard controls

Sound array Audio: disabled U/u select | V/v channel 1 | T/t channel 2 VM ``

Portable by design

No compiler, native terminal mode, package manager, or FFmpeg is required. The site is static and all execution happens locally in the browser.

Keyboard-native

Arrow keys are translated to the same escape-byte sequences seen by terminal programs. A standalone ESC is still distinguishable without busy-waiting.

Two audio channels

The shared sound address and independent channel 1/channel 2 playback map directly to the Web Audio API, so overlapping sounds work across modern browsers.