SYS_INTM
i2c_wr8(sd, SYS_INTM, ~(MASK_M_DDC | MASK_M_DVI_DET |
i2c_wr8(sd, SYS_INTM, ~MASK_M_DDC & 0xff);
u8 sys_int_mask = i2c_rd8(sd, SYS_INTM);