Disk Writers disappeared by 1993:
https://pony.velvet.jp/fcdisk/fmcmdskw32_rks.html
https://groups.google.com/g/fj.rec.games.video.home.superfamicom/c/0kN8TTPKHo4/m/JAsNpv2Si_kJ post by MORISHIMA Akihito
http://www.fc1983.com/k/syuhen.html - says around 1992
https://www.nintendo.co.jp/n09/fc_disk/index.html - Rewriting service still continued with mail-in until 2003
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Chris Covell's coverage of FDW magazine articles:
https://www.chrismcovell.com/secret/sp_FDShardware.html#diskwriter
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Nintendo employee finds Disk Writer in warehouse:
https://topics.nintendo.co.jp/article/0275103c-85e5-11e6-9b38-063b7ac45a6d
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Nintendo Page on the Disk Writer:
https://www.nintendo.co.jp/nom/0408/what/
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Forest of Illusion group dumps EEPROM packs:
https://forestillusion.com/2022/famicom-disk-writer-eeprom-pack
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You could rewrite side A or B independently:
https://groups.google.com/g/rec.games.video/c/9RrbQeWXZxo/m/ZLT3U5p9rKgJ
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Disk Fax was also collected in 1993 (Installed in 1987):
https://www.happy-today.org/nintendo/wanted.html
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Nintendo planned on installing 10,000 Disk Writers throughout stores:
https://archive.org/details/0966961706/page/n83/mode/2up?q=%22Disk+Writer%22
However, there were only about 3,200:
https://ja.wikipedia.org/wiki/%E3%83%95%E3%82%A1%E3%83%9F%E3%83%AA%E3%83%BC%E3%82%B3%E3%83%B3%E3%83%94%E3%83%A5%E3%83%BC%E3%82%BF_%E3%83%87%E3%82%A3%E3%82%B9%E3%82%AF%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0
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Disk Writer games:
https://www.famicomworld.com/forum/index.php?topic=985.msg9420#msg9420
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https://downloads.khinsider.com/game-soundtracks/album/famicom-20th-anniversary-original-sound-tracks-vol.3
Soundtrack includes Disk Writer songs
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FDS Overview
https://pony.velvet.jp/fcdisk/fmcmdskw24_nintendo2.html
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FDS Factory was lined up with Disk Writers
https://www.ndw.jp/disksystem-interview-230221/2/
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JP,62-049548,A(1987)
JP,62-074194,A(1987)
JP,62-067699,A(1987)
Satoshi Yamato invented the Disk Writer
https://donburi.accountant/history/?ds=22849&do=5&cname=%E4%BB%BB%E5%A4%A9%E5%A0%82%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE
Yamato joined in 1980
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Satoshi Yamato GB Adapter Interview
https://www.nintendo.co.jp/event/sw2000/sokuho/26/page05.html
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Notes about "Nintendo Entertainment" stores
https://note.com/syosin_kai/n/n22097a6ddd11
https://dic.nicovideo.jp/a/%E5%88%9D%E5%BF%83%E4%BC%9A
https://monobook.org/wiki/%E5%88%9D%E5%BF%83%E4%BC%9A