As I’ve expected previously,this game simply uses different addresses for the video ram and two planes instead of four.It appears to be an earliest revision than the other games of this hardware,namely:

urashima -> daireika/mjzoomin -> kakumei/kakumei2 -> suchipi

Needless to say,the game now “somewhat” works.Still to do: fix/find the tile banking (as you can see in snap 4) and double check the scrolling registers.

Got a look into the jalmah.c driver again,fixed a regression which caused an hang bug into daireika,mjzoomin and urashima and fixed a protection issue with the random number generator into Mahjong Daireikai.Game now fully playable with some annoying video issues here and there.

Next episode only on this channel: get Urashima Mahjong to work.