Changes

After writing data to the OTP (therefore locking boot1, and setting all of the sysem's console-unique encryption keys), 123J encrypts the console's NAND filesystem using the newly generated NAND keys; these are the very same keys you get in your keys.bin file along with a BootMii dump, which are needed to decrypt the NAND. An odd behavior that many of the factory discs have which begins in 123J is "outsourcing" tasks by installing WADs to the NAND and then executing them in order to perform certain tasks, instead of just performing them with code on the disc. While it's not entirely clear why they chose to do this, it's good news for us since it means far more remnants are left on NAND for us to look at. 123J does this for the NAND encryption process by installing a title known as "0000dead"; you can see this for yourself in your very own Wii NAND dump by examining the installed titles; you will find one by this name which possesses no content, but it does still have a folder hierarchy and a TMD. This title also shows up in uid.sys, but not under the 0000dead name; instead, it shows up as a strange "√û" character, which is actually "DE AD" in hex.

After writing data to the OTP (therefore locking boot1, and setting all of the sysem's console-unique encryption keys), 123J encrypts the console's NAND filesystem using the newly generated NAND keys; these are the very same keys you get in your keys.bin file along with a BootMii dump, which are needed to decrypt the NAND. An odd behavior that many of the factory discs have which begins in 123J is "outsourcing" tasks by installing WADs to the NAND and then executing them in order to perform certain tasks, instead of just performing them with code on the disc. While it's not entirely clear why they chose to do this, it's good news for us since it means far more remnants are left on NAND for us to look at. 123J does this for the NAND encryption process by installing a title known as "0000dead"; you can see this for yourself in your very own Wii NAND dump by examining the installed titles; you will find one by this name which possesses no content, but it does still have a folder hierarchy and a TMD. This title also shows up in uid.sys, but not under the 0000dead name; instead, it shows up as a strange "√û" character, which is actually "DE AD" in hex.

Now that 123J has finished running, having written the OTP, encrypted the NAND, and possibly updated boot1, it's time to start our testing procedure to make sure the console is in working order. The next disc inserted to start this procedure is known by its title ID as 121J; 121J is probably the most mysterious of the factory discs, as its apparent purpose doesn't make much sense, and we don't have many remnants of it or information about it. It appears that 121J is a disc focused around the GameCube mode of the Wii; it installs BC and MIOS (files needed for GC compatibility), and performs a test of the GameCube compatibility mode. This seemingly makes sense, but as you'll see soon, 121J isn't the last disc to run tests; it's not known why it specifically was used for testing GC compatibility. While this is all we really know about the mysterious 121J, there is one more tidbit; 121J creates the factory test log file, which is then written to by the next factory disc. It's not known why the file isn't created by the next disc, but this may indicate that 121J had a larger part in the testing role than we believe. As GameCube testing information isn't written to the testlog, it's possible that originally it was, and this was simply removed but the testlog was still created by 121J so the next disc wouldn't have to be modified.

Now that 123J has finished running, having written the OTP, encrypted the NAND, and possibly updated boot1, it's time to start our testing procedure to make sure the console is in working order. The next disc inserted to start this procedure is known by its title ID as 121J; 121J is probably the most mysterious of the factory discs, as its apparent purpose doesn't make much sense, and we don't have many remnants of it or information about it. It appears that 121J is a disc focused around the GameCube mode of the Wii; it installs BC and MIOS (files needed for GC compatibility), and performs a test of the GameCube compatibility mode. This seemingly makes sense, but as you'll see soon, 121J isn't the last disc to run tests; it's not known why it specifically was used for testing GC compatibility. While this is all we really know about the mysterious 121J, there is one more tidbit; 121J creates the factory test log file, which is then written to by the next factory disc. It's not known why the file isn't created by the next disc, but this may indicate '''that 121J had a larger part in the testing role than we believe'''. As GameCube testing information isn't written to the testlog, it's possible that originally it was, and this was simply removed but the testlog was still created by 121J so the next disc wouldn't have to be modified.

The next disc is by far the most interesting. It does two things; installing an IOS used for testing, and installing a WAD file that does all the work.

The next disc is by far the most interesting. It does two things; installing an IOS used for testing, and installing a WAD file that does all the work.