D_DATA
mpudatabyte = gPCI->read_io_32(addrport + D_DATA);
mpudatabyte = gPCI->read_io_32(addrport + D_DATA);
gPCI->write_io_32(addrport + D_DATA, mpudatabyte);
gPCI->write_io_32(addrport + D_DATA, mpudatabyte);