INTR_PENDING
while (((intstat = bt_inb(bt, INTSTAT_REG)) & INTR_PENDING) != 0) {
if ((intstat & (INTR_PENDING|CMD_COMPLETE))
== (INTR_PENDING|CMD_COMPLETE)) {
if ((intstat & (INTR_PENDING|IMB_LOADED))
== (INTR_PENDING|IMB_LOADED))
} else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
== (INTR_PENDING|CMD_COMPLETE)) {