INT 11 - Blank-It Screen Blanker - SET TIMEOUT FOR SCREEN BLANKING

	AX = 0225h
	BX = 6901h
	CX = timeout in timer ticks (18.2/second) or 0000h to disable timeout
	     largest value is 59 minutes (FBACh or 64428)
Return: CF clear if successful
	    DI = 6A6Ah (possibly also 6A6Ah for all following functions)
	    AH = ???
	CF set on error
	    AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6904h
Index:	screen saver;Blank-It