This class implements the rombank Table Of Contents, which, according to Allan
Blomquist is something like this:
"The rombank format is really simple. the first part is a TOC with each
game having a 32 byte entry. the first 28 bytes are the title of the
game and the last 4 bytes are a 32 bit, little endian word, the lower
20 bits of which are the sector offset that the game starts at and the
upper 12 bits are the size of the game in sectors (a sector is 0x800
bytes). terminate the TOC with an extra entry with the first byte of
the title set to 255. then starting with the next sector after the TOC,
you just put all the games. that's about all there is too it.