EG_COMMAND
bus_space_write_1(bst, bsh, EG_COMMAND, b);
sc->eg_pcb[0] = bus_space_read_1(bst, bsh, EG_COMMAND);
sc->eg_pcb[1] = bus_space_read_1(bst, bsh, EG_COMMAND);
sc->eg_pcb[2+i] = bus_space_read_1(bst, bsh, EG_COMMAND);
if ((b = bus_space_read_1(bst, bsh, EG_COMMAND)) != sc->eg_pcb[1] + 2) {