Thanks Daniel. It is your basic beam resting on posts, flooring on beam, post on flooring, directly over beam.
I came across Simpson ABA46z, which, in addition to the large hole for an anchor bolt, has two smaller holes. I'm just going to screw that bracket through the flooring into the beam, set in the post and side nail it in through the plates, as directed; and "toe-screw" it at the top. Don't tell Simpson, but I might drill an extra hole or two in the bottom plate, as the holes provided are very near the edges.