Sea battle 2nd player

[J03M4N]

This core is fantastic (v1.2 on RA1.17.0), the 16 direction gamepad is working on xperia play, so cool. I've been playing with netplay, it WORKS on Frog Bog and Shark Shark, so thanks for savestates. My issue is: I think that Sea Battle would be great on netplay, but 2nd player doesn't work, You can't swap players. The keypad interface seems to be only available for 1st player but it only works in one direction for both x and y, you can move the cursor up and left, but not down and right. Thank you to all the contributers to this effort, your work is highly appreciated.