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