INT 21,43 - Get/Set File Attributes

	AH = 43h
	AL = 00 to get attribute
	   = 01 to set attribute
	DS:DX = pointer to an ASCIIZ path name
	CX = attribute to set

	│5│4│3│2│1│0│  CX  valid file attributes
	 │ │ │ │ │ └──── 1 = read only
	 │ │ │ │ └───── 1 = hidden
	 │ │ │ └────── 1 = system
	 │ └─┴─────── not used for this call
	 └────────── 1 = archive


	on return:
	AX = error code if CF set  (see DOS ERROR CODES)
	CX = the attribute if AL was 00

	- see	DIRECTORY