SXFR_ULTRA2
scsirate &= SXFR_ULTRA2;
else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2))
scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC);
if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/