INT 7C - SK-UPPS/SK-PASSPORT Data Link Interface (DLI) 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.
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
	  which provides an 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. on top of it Data Link Interface, allowing the
	  use of any of several network transport layers; this product is
	  called SK-PASSPORT in the USA.
InstallCheck:	test for the ASCII signature string "UPPS_DLI" immediately
	  preceding the interrupt handler
Notes:	To find the service interrupt being used by the driver, an application
	  should scan through the interrupt table until it finds an interrupt
	  vector with the "UPPS_DLI" string.
	There may be more than one DLI loaded, each having its own service
	  interrupt.
SeeAlso: AX=0000h,AX=0002h,AX=000Fh
Index:	installation check;SK-UPPS