1. Fixed bug in booting ultima iv.
2. Add zero checksum to woz file after write.
1. Prepare a SD card loaded with the firmware file(wdrive.bin) in root directory.
2. Press and hold both left and select key, then reset wDrive by push the reset button.
3. After reset, the wDrive’s screen shows “Release key....”. Then release the keys and wDrive start update the firmware and reboot.