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. - GET PROTOCOL STATUS AX = 000Ch BX = protocol ID (see #03849,AX=000Bh) ES:DI -> Protocol Status Block (see #03856) Return: AX = completion code (see #03846) SeeAlso: AX=000Bh,AX=0014h Format of SK-UPPS Protocol Status Block (PSB): Offset Size Description (Table 03856) 00h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. -> ASCIZA NUL-terminated ASCII string. The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h. Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. protocol name 04h WORD protocol mode (see #03850) 06h WORD protocol type (see AX=0007h) 08h WORD number of registered multicasts (see AX=0009h,AX=0014h)