BT_STAT_PORT
sts = isa_inb(iobase + BT_STAT_PORT);
while ((isa_inb(iobase + BT_STAT_PORT)) & BT_STAT_DF)
sts = isa_inb(iobase + BT_STAT_PORT);
sts = isa_inb(iobase + BT_STAT_PORT);
sts = isa_inb(iobase + BT_STAT_PORT);