From: Jerritt Collord (collord_at_linuxfund.org)
Date: 2002-08-20 23:33:39 UTC
> CR10 bit0: 0=dual antenna for diversity, 1=single antenna
> CR10 bit1: 0=AntSel pin low, 1=AntSel high
> I would interpret that so that no diversity and AntSel low could be
> set with:
> Anyway, there might be differences between cards, so always better to
> read the original values and do bitops on them and write new values.
> You should also note that these values do not survive HW reset since
> they are not saved anywhere in the driver data.
I tested this a bit today. This definitely seems to do something.
FWIW, a list of default 18/20 values for a few cards:
18 20 Senao 162 200 Zcomax 162 188 DLink 162 248
My basic test was with the Zcomax, attaching the little antenna rotated 90 degrees so that one antenna port has a definite disadvantage. From this it can be seen that 18/20 set to 164/191 uses the antenna port by the LEDs, 160/189 the other.
Will test with other cards as I can.