https://www.datarecoverytools.co.uk/2009/10/15/the-int13h-interface-and-its-int13h-extensions/
The Int13h Interface And Its Int13h Extensions - Data Recovery Salon
Oct 15, 2009 - The Int13h Interface When the operating system or an application wants to access the hard disk, it traditionally employs BIOS services to do this. The
data recoveryinterfaceextensionssalon