//called once upon cartridge load event: perform dry-run state save.
//determines exactly how many bytes are needed to save state for this cartridge,
//as amount varies per game (eg different RAM sizes, special chips, etc.)
public void serialize_init()
{
Serializer s = new Serializer();
uint signature = 0, version = 0, crc32 = 0;
byte[] profile = new byte[16], description = new byte[512];
s.integer(signature, "signature");
s.integer(version, "version");
s.integer(crc32, "crc32");
s.array(profile, "profile");
s.array(description, "description");
serialize_all(s);
serialize_size = s.size();
}