Segments 0x12 and 0圎 will load just fine, since the ROM address values are even. The segments 0x07, 0xB, and 0x09 will fail to load on console, since the ROM address values are odd. This means that if the start/end ROM addresses within the 0x17/0x18/0x1A commands were odd, then copying data from ROM to RAM would fail. The N64 requires a 2-byte alignment for ROM addresses, and an 8-byte alignment for RAM addresses when copying data. The problem with early extender tools, like VL-Tone's original SM64 ROM extender, is that the addresses where the decompressed data was stored was in a bad alignment. Since ROM hackers don't really need to worry about file sizes (up to 64MB), we use ROM extenders to decompress the data into another place in the ROM file and convert all of the 0x18 level commands into 0x17 commands. The MIO0 compression was necessary to make SM64 fit within an 8MB cartridge. Level script command 0x17 is used from copying uncompressed data from the ROM into RAM, and the commands 0x18 & 0x1A are used to read compressed MIO0 data from the ROM and then decompress the data into RAM. In SM64, the game will load up scripts & models using level script commands for each level.

Sm64 green screen rom