INT F1 - Common ISDN 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. (CAPI) v1.1 - "API-DEINSTALL" - UNINSTALL
	AH = 06h
	BX = force flag
	    0000h normal uninstall
	    0001h forced uninstall
Return: AX = status (0000h,1008h) (see #04069)
Desc:	reset ISDN controller, close all ISDN Level 1 connections except for
	  telephone connections
Notes:	the caller is required to provide at least 512 bytes of stack space
SeeAlso: INT F1/AL=01h,INT F1/AH=01h