INES Mapper 087

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 Here are Disch's original notes:  
 ========================
 =  Mapper 087          =
 ========================
 
 
 Example Games:
 --------------------------
 Argus (J)
 City Connection (J)
 Ninja Jajamaru Kun
 
 
 Notes:
 ---------------------------
 Regs are at $6000-7FFF, so these games have no SRAM.
 
 
 Registers:
 --------------------------
 
   $6000-7FFF:  [.... ..AB]
     B = High CHR Bit
     A = Low CHR Bit
 
   This reg selects 8k CHR @ $0000.  Note the reversed bit orders.  Most games using this mapper only have 16k
 CHR, so the 'B' bit is usually unused.