INTEGER*4 Format
An INTEGER*4 datum is always an exact representation of an integer, whose
values can be positive, negative, or zero.
An INTEGER*4 datum occupies one 32-bit word (four bytes), in two's
complement format, and has a range of:
-2147483648 to +2147483647 (-231 to +231-1)
Figure 10-3. INTEGER*4 Format