This board was purchased some time ago when nintendoage was still around. I have no history on the board and no one seems to know where it came from. Possibly a developer board. My guess would be something to take screen shots of game play judging by the translation. I cannot find anything else like this around. Hoping someone may have some idea here.
Nothing will load on screen on either an SNES console or a Retron 3 console.
Translation provided by a Reddit user:
 浜江スペシャル写真撮り用 R ポーズ - L コマ送り
4F以外で見つけた場合は御一報下さい。
"Hamae Special for shooting photos." "R pause - L frame advance"
"Please let us know if you find it on other than the 4th floor. "
(https://www.reddit.com/r/Japaneselanguage/comments/l9qzga/can_someone_translate_this_to_english/?utm_source=share&utm_medium=ios_app&utm_name=iossmf)