Memory:
- 80693348 through 8069335f: a bunch of shorts that contain the weight calibration values from 0x24 through 0x3b, as documented on https://wiibrew.org/wiki/Wii_Balance_Board#Calibration_Data.
- 80693360 through 8069336f: 16 bytes that are used to temporarilly store data extension register stuff.
- 80693370: the byte at 0x20
- 80693371: the byte at 0x21
- 80693372: the byte at 0x60
- 80693373: the byte at 0x61
- 80693374: the 4-byte checksum at 0x3c