[En-Nut-Discussion] ethernut MMC card

[rbb at pdx.edu]

On this website: http://ethernut.de/en/documents/phat.html

it says that the max. performace with MMC cards on Ethernut 3 is 128  
kBytes/sec for writing...
I have an SD card that can be written to at 15MBytes/sec if I use 4  
data lines.
My question is, why does Nut/OS use only SPI mode... and is there a  
way I can use all 4 data lines to write to the SD card?

Thanks