This is the 32-bit unsigned integer that is seen at offset `0x04` in the
`bi2.bin` file.
The intent is to study what games define values that departure from the
norm. Common values are 0 MiB (Wii games) and 24 MiB (GameCube games),
with some debug and demo builds featuring 48 MiB (e.g. the debug build
of _Mario Kart: Double Dash!!_).