INT 65 U - EZRECV v1.0 - 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 = function 0000h ??? Return: AX = ??? or FFFFh 0001h ??? Return: AX = status (0000h or 0001h) 0002h ??? Return: AX = status (0000h or 0001h) 0003h set ??? to 0001h Return: AX = 0000h 0004h ??? Return: AX = ??? Return: BH = COM port being used BL = speed??? CH = ??? CL = ??? DX = ??? DS = ??? ES = EZRECV data segment Program: EZRECV is a background Zmodem file receiver by Express Consulting