BUS_NRFD
status |= BUS_NRFD;
status |= BUS_NRFD;
if ((lines & BUS_NRFD) == 0 && (lines & BUS_NDAC) == 0)
status |= BUS_NRFD;
status |= BUS_NRFD;
line_status |= BUS_NRFD;
if ((status & BUS_NRFD) == 0) {
status |= BUS_NRFD;
line_status |= BUS_NRFD;
line_status |= BUS_NRFD;
status |= BUS_NRFD;
status |= BUS_NRFD;