Kishin Douji Zenki - Tenchi Meidou does the following:
D9B831: LDX $18
D9B833: DEX ;X = 0x0000 -> X = 0xffff
D9B834: PHX ;Puts X into the stack
D9B835: RTL ;stack 0xc3 0xff 0xff
C40000: TSB $0c39 ;BSNES returns at 0xc30000!
I'm wrong or it's another in-bank case just like the Rock n'Roll Racing DMA issue?