Hello,

I have found a clock code sample to (try to) understand how interrupts work.

I can't find informations about the necessity of the "ENABLE" command.

Actually, the code I have doesn't state any ENABLE command after the subroutine (after the DISABLE) has been executed; only RESUME is there. And it works well.

Shall I understand that ENABLE is not mandatory?

Code:
...
DISABLE
SubRoutine:
   ...
   RESUME
   'I can state an ENABLE command here but it will change nothing to the program