INT 21 - DOS 1+ - RANDOM BLOCK READ FROM FCBsee File Control Block FILE
	AH = 27h
	CX = number of records to read
	DS:DX -> opened FCBsee File Control Block (see #01345)
Return: AL = status
	    00h successful, all records read
	    01h end of file, no data read
	    02h segment wrap in DTAsee Disk Transfer Address, no data read
	    03h end of file, partial read
	Disk Transfer Area filled with records read from file
	CX = number of records read (return AL = 00h or 03h)
Notes:	read begins at current file position as specified in FCBsee File Control Block; the file
	  position is updated after reading
	not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=21h,AH=28h,AH=3Fh"DOS"