Destination Tested -->; Condition Codes
Attributes: Size = (Byte, Word, Long)
Description: Compares the operand with zero and sets the con-
dition codes according to the results of the test. The size of
the operation is specified as byte, word, or long.
X Not affected.
N Set if the operand is negative. Cleared otherwise.
Z Set if the operand is zero. Cleared otherwise.
V Always cleared.
C Always cleared.
TST can use ADDRESS REGISTER