com_dlbl
CSR_WRITE(com_port, com_dlbl, speed);
OUTB(com_dlbl, rate);
bus_space_write_1(bst, bsh, com_dlbl, divisor & 0xff);
REGWRITE_1(VR4181_SIU_ADDR, com_dlbl, rate);
rate = inb(combase + com_dlbl) | inb(combase + com_dlbh) << 8;
outb(combase + com_dlbl, rate);
com0addr[com_dlbl] = htole32(rate & 0xff);
com0addr[com_dlbl] = htobe32(rate & 0xff);
bus_space_write_1(iot, ioh, com_dlbl, rate);
CSR_WRITE(com_port, com_dlbl, speed);
dll = bus_space_read_1(&genppc_isa_io_space_tag, comh, com_dlbl);
[COM_REG_DLBL] = com_dlbl,