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Open this page in Chrome or Edge on a Mac, Windows or Linux computer (Safari and Firefox don't support WebUSB).
Cartridge
Plug in the cart (with its USB cable) and click Connect. Close the EMS app or ems-flasher first if they're running.
Cart not in Chrome's list? to see what Chrome can find. No cart handy? — nothing is sent anywhere.
Library
Ready-made ROMs, one click to add. If the page already has one with the same title, you can replace it.
Page 1
Drop .gb / .gbc files here to add them to page 1
Page 2
Drop .gb / .gbc files here to add them to page 2
Save RAM
The cart has one 128 KB battery-backed save RAM shared by every game on both pages — playing a different game that saves can overwrite another game's save. Download it before switching games you care about.