Adding Cruise to This?

Looks like the TAS SAW board.  That is indeed one that you have to replace the whole shooting match.

What you can do is buy a Lionel diesel motherboard and transplant the three boards to it and then use the CC-M if you like.

Another option is to buy the Cruise Commander and then the RailSounds Powered Motherboard from Lionel and use the existing sound card.

If I were doing the job, I'd just buy the Cruise Commander and RailSounds Commander and do a full upgrade.

Like John says if its a SAW board you will basically have to change everything but make sure it is a SAW board. I have both SAW boards and EOB boards and the one in the picture is not exactly like either of the ones I have. TAS had various versions over the years. To make sure pull the daughterboards and check whats printed on the motherboard.

Edit, if it has EOB it will have a tach strip and sensor on the flywheel. If not its a SAW board.

Pete

The EOB will have a uP on the main board, the SAW will not have it.  The board he has has the right number and position of the connectors to be a SAW board.

Simple check, is there a tach reader and tach tape on one of the motors?

Here's a side view of the EOB board, you can see the uP socket on the left next to the blue capacitor.

The flywheels have no tach tape or tach readers, so it looks like it's a TAS SAW board.

Obviously, the EOB would take off like a rocket if the tach reader isn't there.