They probably aren't describing them very succinctly, because there isn't really a benefit to dropping information in the complete instruction set reference. If

They probably aren't describing them very succinctly, because there isn't really a benefit to dropping information in the complete instruction set reference. If you don't want all of the information, look at the instruction set summary instead (~40 pages in volume 1). These things aren't written to be brief, they are written to be complete.