Calculations Done in Defining Statements ID Number: Q11185
1.25 1.27 3.0x 4.00 5.00 MS-DOS
Summary:
SYMPTOMS A DD statement containing a large calculated expression does not assemble correctly, as in the following example:
dd 606024 ; assembles incorrectly dd 86400 ; assembles correctly
CAUSE This behavior is not a problem. The assembler is producing the correct answer MOD 65536, i.e., it is performing 16-bit arithmetic. The Macro Assemblers prior to version 5.1 do not provide for anything other than 16-bit arithmetic.
RESOLUTION A workaround to this behavior is to avoid using calculated expressions that exceed 16 bits; instead, substitute a single constant.
