UHCI_TD_IOC
dataend->td.td_status |= htole32(UHCI_TD_IOC);
std->td.td_status &= htole32(~(UHCI_TD_ACTIVE | UHCI_TD_IOC));
dataend->td.td_status |= htole32(UHCI_TD_IOC);
UHCI_TD_ACTIVE | UHCI_TD_IOC);
status |= UHCI_TD_IOC;
std->td.td_status &= htole32(~(UHCI_TD_ACTIVE | UHCI_TD_IOC));
ux->stdend->td.td_status &= htole32(~UHCI_TD_IOC);
dataend->td.td_status |= htole32(UHCI_TD_IOC);