This node allows t_grs01_dgentry_8c to connect to the
dgn01 tileset.  
It is connected to the outside world by connecting it to 
t_grs01_dgentry_8b *or* t_nt03_dgentry_8b, which 
connects to t_grs01_dgentry_8a *or* t_nt03_dgentry_8a.

submitted by Xaa