[Segher Boessenkool]

>>> I think the proper test is ((cb & 5) == 5) but I can't remember for
>>> sure..
>> That is correct if you know for sure the controller
>> actually supports native mode, and doesn't have that
>> support turned off by some configuration setting;
>> otherwise, the test should be ((cb & 0xf) == 0xf).
>
>   "I protest your honor". :-)
>   Bits 1 and 3 only indicate that bits 0 and 2 are writeable.

Darn you're right.  Sorry for the confusion.


Segher