Function  14h   Sequential Disk File Read                                 (FCB) 
      Reads record sequentially from disk via Struct -FCB
entry   AH  14h 
	DS:DX	pointer to an opened Struct -FCB
return  AL      00h     successful read 
		01h     end of file (no data read) 
		02h     Data Transfer Area too small for record size specified 
			or segment overflow 
		03h     partial record read, EOF found 
note 1) The record size is set to the value at offset 0Eh in the Struct -FCB.
     2) The record pointed to by the Current Block (offset 0Ch) and the Current 
	Record (offset 20h) fields is loaded at the DTA, then the Current Block 
	and Current Record fields are incremented. 
     3) The record is read into memory at the current DTA address as specified  
	by the most recent call to function 1Ah. If the size of the record and 
	location of the DTA are such that a segment overflow or wraparound would 
	occur, the error return is set to AL=02h 
     4) If a partial record is read at the end of the file, it is passed to the 
	requested size with zeroes and the error return is set to AL=03h.