64×SCM signal and computation propagation. A. One 64×SCM module aligns an 8-character partial search sequence to an 8-character target sequence. The arrows show the propagation directions of the signals. Because the 64×SCM is unclocked, there is no pre-determined path of propagation. B. When the search and/or target sequences are greater than 8, the scoring matrix is partitioned into many 8 by 8 segments, each to be computed by the 64×SCM.