Currently there is a discussion about USB2 on the MorphOS Mailing List.

There I found a hint how to get my USB2 card (NEC chipset and ArakAttack 1.19) working: by setting the usb-enable env to "false" in the Open Firmware.

Now I at least get the USB2 card working without crashing within seconds, but still I get no USB2 speed. My massstorage devices are only recognized as "Fullspeed" devices, but as they are USB2.0 compliant devices they should be recognized as "Highspeed", just as the EHCI hub which is built-in in my USB2 card.

Does anyone know how I get Poseidon (or ArakAttack) to recognize these USB2.0-devices as Highspeed-devices?