Firebird CpuAffinityMask for 16 core server? Question of the day

We have this question on serverfault and the answer is in that thread too :

I have a server with 16 cores. What do I set the CpuAffinityMask to?

1111 1111 1111 1111 is 65535, should I put 65535?

Also, how to I configure the SuperClassic server?

This is for Firebird 2.5.