[... ] Memory reference. The expression within brackets is evaluated completely prior to being treated as a single
expression element. Another expression can precede the expression within the brackets; the result in this case is
the sum of the values of the two expressions, with the type of the first expression. The result is always a memory
reference.
. Structure member selector. The result is the sum of the expression before the period and the expression after
the period, with the type of the expression after the period. Symbols belonging to the scope identified by the
expression before the period can be accessed in the expression after the period.
HIGH
Returns the high-order 8 bits of the word-sized expression following the operator. The expression must be an
absolute immediate value.
LOW
Returns the low-order 8 bits of the word-sized expression following the operator. The expression must be an
absolute immediate value.
