FDREG77_MSR
msr = bus_space_read_1(t, h, FDREG77_MSR);
v = bus_space_read_1(t, h, FDREG77_MSR);
u_int8_t v = bus_space_read_1(t, h, FDREG77_MSR);
u_int8_t v = bus_space_read_1(t, h, FDREG77_MSR);