5.3.4.5 How Do I Access Values Stored in a PSV or EDS Page?
16-bit devices have a method of accessing data memory from within Flash
memory called Program Space Visibility (PSV). You can access values in PSV memory by using
the __psv__ qualifier. Another method to access data space from program
memory is called Extended Data Space (EDS). You can access values in EDS by using the
__eds__ qualifier. For more on each of these qualifiers, see the
following sections in this user’s guide: