INT 7F U - Voyetra - AAPISG - 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. AX = 4150h ('AP') BH = C1h BL = function (00h-13h) 00h initialize (fails except first time called) ??? Return: AX = status??? 0000h successful 0001h failed Program: AAPISG is a driver by Voyetra for the Aztech Sound Galaxy sound board BUG: the function range check uses JL instead of JB, so it will cause a crash if BL >= 80h on entry SeeAlso: AX=4331h,AX=564Dh,AX=5658h