SEND_SC2VLT2
write_csr(dd, SEND_SC2VLT2, 0);
write_csr(dd, SEND_SC2VLT2, SC2VL_VAL(
write_csr(dd, SEND_SC2VLT2, *val++);
*val++ = read_csr(dd, SEND_SC2VLT2);