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■ About the formula

The
expression can be used freely for instructions and operands.
The elements that make up an expression are: 
 symbol
operator
Constant (numeric or character)
Location mark

Symbol

The
symbol is used when a character string defined as a label is used in an expression.

operator

The following table shows the
operators. The operator precedence is also shown in the table. 

 operator 
 Meaning 
 Priority 
 * 
 Multiplication 
 1
 / 
 Division 
 MOD
 
 remainder 
 + 
 Addition 
 2
 −
 
 Subtraction 
 SHR
 
 Shift right 
 3
 SHL
 
 Shift left 
 LAND
 
 Logical AND 
 4
 LOR
 
 Logical OR 
 LXOR
 
 Logical XOR 
 EQ
 
 equal 
 5
 NE
 
 not equal 
 LT 
 less 
 LE 
 equal or less 
 GT
greater than 
 
 GE 
 equal or greater 
 NOT
 
 1's complement (Z80 only) 
 6
 NOT1
 
 1's complement (68K only) 
 HIGH
 
 upper byte 
 LOW
 
 low byte

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