atari_hw_present
memset(&atari_hw_present, 0, sizeof(atari_hw_present));
struct atari_hw_present atari_hw_present;
EXPORT_SYMBOL(atari_hw_present);
extern struct atari_hw_present atari_hw_present;
#define ATARIHW_SET(name) (atari_hw_present.name = 1)
#define ATARIHW_PRESENT(name) (atari_hw_present.name)