INT 16 - TrLit - 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 = 5472h ('Tr')
	BX = 4C54h ('Lt')
	CL = function
	    00h installation check
		Return:	DX = 1234h if installed
			    AX = 100*version (binary, 00E9h = v2.33)
			    CX = resident code segment
	    01h get original INT 09 vector
		Return: ES:BX -> previous handler
	    02h get original INT 16 vector
		Return: ES:BX -> previous handler
	    else chained
	CH = 00h (for backward compatibility with versions before 2.30)
Program: TrLit is a Russian keyboard transliterator by Rostislav Krasny
Index:	installation check;TrLit