You'll find the zip file here:
Link to the actual file:
Domo arigato Kuroutoshikou! Shame on you Revogear!
The instructions are in Japanese. Since I don't read (or speak!) Japanese, I had to rely on a machine translation of the readme:
[code]u-boot environment variable initialization procedure example (reference information) It is possible to reset u-boot environment variable to initial condition (flash boot) with the following procedure.
1. The serial console is connected, the power of KURO-BOX/PRO is turned on. When 2nd below-mentioned indication appears in the serial console, within 2 seconds <Pushing>< ctrl> + c, it puts in u-boot command prompt state. â€œHit any key to stop autoboot: â€