JP1 Remotes

I did some experimenting and found two 'new' EFC for Cable 0476:
204 = Play
211 = Stop

The currently listed codes (178 and 174) are actually duplicates of Day+ and Day- and are part of the box's ability to use a remote without transport keys (just like left and right duplicate rew and ff). 204 and 211 are exclusively Play and Stop.

Along the same lines my Motorola DCT6412 uses

081 Lock (it is listed as PPV)

In addition,

175 DVR

takes you directly to recorded programs