Changes

It is not yet clear why these sentences are repeated; but since at least the second one is known to be calibration data, maybe one version contains the calibration data that is actually being used, while the other version is meant for backup purposes (for example a "Return to factory settings" option) in case there will be a way of recalibrating the Wii Remote with future Wii firmware updates.

It is not yet clear why these sentences are repeated; but since at least the second one is known to be calibration data, maybe one version contains the calibration data that is actually being used, while the other version is meant for backup purposes (for example a "Return to factory settings" option) in case there will be a way of recalibrating the Wii Remote with future Wii firmware updates.

The three bytes starting at 0x0016 and 0x0020 store the calibrated zero offsets for the accelerometer. Apparently, the three bytes at 0x001A and 0x24 store the force of gravity on those axes. The function of other data bytes is not known, and most of them differ between Wii Remotes. Some or all of these bytes might not be used by the Wii. However, there has been a case of a Wii Remote where Extension functionality was lost following a battery change, and restoring these bytes (which had been previously overwritten) fixed the problem. The Extension controllers did not work with a PC either (which did not explicitly use these bytes), suggesting some of these might be used by the Wii Remote itself. This is unconfirmed, but it is advised that these never be overwritten, and recommended that they be backed up, just in case.

The four bytes starting at 0x0016 and 0x0020 store the calibrated zero offsets for the accelerometer (high 8 bits of X,Y,Z in the first three bytes, low 2 bits packed in the fourth byte as --XXYYZZ). Apparently, the four bytes at 0x001A and 0x24 store the force of gravity on those axes. The function of other data bytes is not known, and most of them differ between Wii Remotes. Some or all of these bytes might not be used by the Wii. However, there has been a case of a Wii Remote where Extension functionality was lost following a battery change, and restoring these bytes (which had been previously overwritten) fixed the problem. The Extension controllers did not work with a PC either (which did not explicitly use these bytes), suggesting some of these might be used by the Wii Remote itself. This is unconfirmed, but it is advised that these never be overwritten, and recommended that they be backed up, just in case.

At 0x16D0, there is some more unknown data:

At 0x16D0, there is some more unknown data: