BCI_CMD_SETREG
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD1);
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD2);
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD1);
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD2);