Marshallh has released a firmware upgrade for the 64drive, the improvements are...
  • Improved SD controller compatibility.
  • Pokemon Stadium 2 savefix fully transparant to the console
  • Fixed stability problem in USB mode.

Remember that the 64drive now can be upgraded directly from the unit, if you have firmware 2.0 installed.
For more info and firmware download, please visit http://64drive.retroactive.be/support.php

http://www.nesworld.com/