Home of the original IBM PC emulator for browsers.
UPDATE: There are now two “Microsoft Adventure” disk images in the PCjs Disk Library. The latest one is called “Microsoft Adventure (Unmodified)”, which recreates the original copy-protected diskette. See the PCjs blog post “Adventures in Copy Protection” for more information.
NOTE: The PCjs “Save” feature will not create a usable copy of a copy-protected diskette. That feature works only with standard disk formats.