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 60*60*24 ; 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.