There can be 1 to 8 hexadecimal digits (0 through 9, A-F).
Any of the letters can be uppercase or lowercase (X, x, A-F, a-f).
The digits must be enclosed in either apostrophes or quotes.
Blanks are ignored.
The hexadecimal digits may be preceded by a + or - sign.
8 hexadecimal digits represent a full 32-bit word and the binary equivalents correspond to the contents of each bit position in the 32-bit word.
If less than 8 digits are present, the value is right-justified—it represents the right most bits of a word: bits n through 31. The other bits are 0.