Yes, the sensorboard now has nvram. It's not literally RAM, but it is a state that is kept after powering off. On a real chesscomputer, the chesspieces don't go anywhere if you power it off. A lot of chesscomputers with battery backed RAM already save the position internally and expect the chesspieces to remain in position when turning the power back on.

Each chesscomputer will save its own last board position. It's not shared (that would not be useful).. but, if you want to, you can copy the "board_position" file from one to the other. For example, you could copy nvram+board_position from "port32" to "van32" after exiting port32 in the middle of a game, and continue playing on van32. (I haven't tried this, I think the nvram files are compatible between 'Weltmeister' class machines)

*edit* I'll disable it for the chesscomputers that don't have nvram (those will always start 'new game' at poweron)