INES Mapper 097

 Here are Disch's original notes:  
 ========================
 =  Mapper 097          =
 ========================
 
 Example Game:
 --------------------------
 Kaiketsu Yanchamaru
 
 
 Registers:
 --------------------------
 I'm not sure whether or not this mapper suffers from bus conflicts.  Use caution!
 
   $8000-FFFF:  [MM.. PPPP]
     P = PRG Reg  (16k @ $C000)
     M = Mirroring:
        %00 = 1ScA
        %01 = Horz
        %10 = Vert
        %11 = 1ScB
 
 
 PRG Setup:
 --------------------------
 
       $8000   $A000   $C000   $E000  
     +---------------+---------------+
     |     { -1}     |     $8000     |
     +---------------+---------------+

Mapper 180 is basically this mapper without mirroring control. (But the fixed bank is 0, not last)