INES Mapper 194

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 Here are Disch's original notes:  
 =  Mapper 194          =
 Pirate MMC3 variant
 Example Game:
 Dai-2-Ji - Super Robot Taisen (As)
 This mapper is a modified MMC3 (or is based on MMC3?).
 In addition to any CHR-ROM present, there is also an additional 2k of CHR-RAM which is selectable.
 CHR Pages $00-$01 are CHR-RAM, other pages are CHR-ROM.
 Apart from that, this mapper behaves exactly like your typical MMC3.  See mapper 004 for details.

A NES 2.0-compliant image and emulator will treat mappers 194 and 195 the same; they both specify CHR-RAM pages start at 0 and contain no mirrors.