MODE_MF
SET_FLAGS(flags, MODE_MF);
DbgBreakIf(!SINGLE_BIT_SET(GET_FLAGS(flags, MODE_SF|MODE_MF)) );
DbgBreakIf(GET_FLAGS(flags, MODE_MF)&& !(GET_FLAGS(flags,MODE_MF_SD|MODE_MF_SI|MODE_MF_AFEX) ));