Persist FS

emulators supports saving and restoring changes made in the file system. It works by dumping file system changes into a second bundle and using it to override the original file system on next load. This feature is backed by CommandInterface persist function.

You can implement your own save/load feature like this:

const bundle = <Uint8Array>;
const ci = await emulators.dosboxWorker(bundle);

// saving
const changesBundle = await ci.persist();

// <new session>

// loading
const ci = await emulators.dosboxWorker([bundle, changesBundle]);

13 октября 2026