tx_chipset
KASSERT(t == &tx_chipset);
tx_chipset.tc_intrt = intrt;
KASSERT(t == &tx_chipset);
tx_chipset.tc_powert = powert;
KASSERT(t == &tx_chipset);
tx_chipset.tc_clockt = clockt;
KASSERT(t == &tx_chipset);
tx_chipset.tc_soundt = soundt;
KASSERT(t == &tx_chipset);
tx_chipset.tc_videot = videot;
struct tx_chipset_tag tx_chipset;
enum tx_chipset tc_chipset;
extern struct tx_chipset_tag tx_chipset;
#define tx_conf_get_tag() (&tx_chipset)