INT 44 - Acorn BBC Master 512 - "OSARGS" - GET/SET FILE PARAMS FOR OPEN FILE

	AH = 00h
	AL = function
	    00h get current filing system
		Return: AL = filing system (see #03200)
	    01h get address of commandline tail
		Return: BX buffer filled with address of command tail in I/O
			      processor address space (use INT 4A/AL=05h to
			      retrieve)
	    FFh flush all files onto secondary storage
	BX -> 4-byte data buffer
Note:	the commandline tail is terminated with a carriage return (0Dh)
SeeAlso: INT 40"Acorn",INT 45"Acorn"