INT 21 - MS-DOS 7.0+ - CONFIG$ device - GET CONFIGURATION INFORMATION

	AX = 4402h
	BX = file handle for character device "CONFIG$"
	CX = number of bytes to read (at least 5)
	DS:DX -> buffer for ??? data (see #01444)
Return: CF clear if successful
	    AX = number of bytes actually read
	CF set on error
	    AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4403h"CONFIG$"