[Oberon] ... MOD 65536

[Hans Klaver]

Sorry: 65636 in the text should be 65536.

> 
>    seed := (seed * 1309 + 13849) MOD 65536  (* use MOD 65636 to get the same output as C *)
>    RETURN seed                         (* in V5 use MOD 65535 to prevent a crash in Tree *)
>  END Rand;
> 
> In Oberon '... MOD 65536' produces the same pseudorandom numbers as '... & 65535' in C.
> I can understand that: at the bit level '... MOD 65536' is equivalent to '... & 65535'.
> 
> But could anyone explain why '... MOD 65636' gives a crash in Tree and '... MOD 65535' does not?