Numeric constants are 32-bit integers. You can set them using
unsigned numbers in the range 0 to 232-1,
or signed numbers in the range -231 to
231 -1. However, the assembler makes
no distinction between -
n and 232-
Relational operators such as >= use the unsigned interpretation.
This means that 0 > -1 is
EQU directive to define constants. You
cannot change the value of a numeric constant after you define it.
You can construct expressions by combining numeric constants and