INT 7C - SK-UPPS Data Link Interface API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. - CHANGE DRIVER ADDRESS AX = 0003h ES:DI -> new node address (6 bytes) Return: AX = completion code (see #03846) Note: the DLI will refuse to change the address if any protocols (see AX=0007h) are active SeeAlso: AX=0001h,AX=000Eh