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February 4, 2026

Dumping Nintendo e-Reader Card “ROMs”

Today I’m documenting how to archive the data on a physical Nintendo e-Reader card so you can play or use the encoded program data later even if you lose the physical card. I use a new developer to the Nintendo e-Reader platform: Matt Greer of Retro Dot Codes and his new game “Solitaire”. We’ll also go a bit further and recover the original binary file that Matt created using Z80 assembly before printing the data to physical cards.

There will be a bit more e-Reader content coming hopefully soon, I need to purchase a filming “arm” to stabilize my phone camera so I can capture some footage of the scanning, playing, archiving, and repeat. Words don’t do complete justice to the physical acts of play on an e-Reader :)

Fun fact: if you read this article on desktop you’ll see the article is the same length (in pixels) as a single e-Reader dotcode strip.

Read more: https://sethmlarson.dev/dumping-nintendo-ereader-card-roms

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