INT 16 - ATIBM PC AT.COM version 8/26/87 - 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 = 8765h
	BX = 4321h
	CX = ??? or FFFFh
	if CX = FFFFh
		DX = number of event to remove or FFFFh
Return: ES:BX -> event record array (see #00607)
Program: ATIBM PC AT.COM is a resident scheduler by Bill Frolik


Format of ATIBM PC AT.COM event record:
Offset	Size	Description	(Table 00607)
 00h	BYTE	in-use flag (00h free, 01h in use, FFh end of array)
 01h	BYTE	day of date on which to trigger
 02h	BYTE	month of date on which to trigger
 03h	BYTE	trigger time, minute
 04h	BYTE	trigger time, hour
 05h	WORD	offset of command to be executed