Edit Infobox GBA Homebrews: 4-e GBA

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4-e is a Game Boy Advance homebrew application that can emulate an [https://www.mariowiki.com/E-Reader e-Reader] for [https://www.mariowiki.com/Super_Mario_Advance_4:_Super_Mario_Bros._3 Super Mario Advance 4]. It allows you to send Super Mario Advance 4 e-Reader cards from one Game Boy Advance running 4-e to another running the game, using homebrew and decoded .bin versions of those cards instead of printed cards on an actual e-Reader. You can learn more about the project [https://mattiebee.io/52283/introducing-4-e-super-mario-advance-4-e-cards-without-an-e-reader on the author's blog]. == User guide == === How to use === # Build the 4-e.gba ROM or download it from [https://github.com/mattieb/4-e/releases releases]. # Using [https://mattiebee.app/gbfs-web gbfs-web], attach the e-Card .bin files you wish to use to 4-e.gba, and save a new ROM. #* You can also use the standard tools from [https://pineight.com/gba/#gbfs GBFS] to create a GBFS file, then concatenate it to 4-e.gba. (These tools are also included in the "gba-tools" package in devkitARM.) # Link two Game Boy Advance systems with a link cable. The game must be player 1, and 4-e must be player 2. # On the first system, run Super Mario Advance 4. # On the second system, run your custom 4-e ROM. # Pick the e-Card you wish you send from the list. If your GBFS file only had one e-Card in it, it will be selected automatically. From this point on, you can cancel and reset by pressing B. # On the first system, start the e-Reader communication process. 4-e will connect to the game automatically and try to send your card. # When the game has finished, press any button on 4-e to reset so you can send another card if you wish. === Troubleshooting === '''4-e doesn't respond when I start communication''' Check that your link cable is connected firmly and correctly. * If you're using the official Nintendo link cable, it must be connected with the purple end to the game and the gray end to 4-e. * If you're using the Analogue Pocket link cable, it must be switched to GBA mode, not GB/C mode. == Screenshots == https://dlhb.gamebrew.org/gbahomebrews/4egba2.png https://dlhb.gamebrew.org/gbahomebrews/4egba3.png https://dlhb.gamebrew.org/gbahomebrews/4egba6.png https://dlhb.gamebrew.org/gbahomebrews/4egba7.png == Compatibility == It has been tested to successfully and reliably send demo, power-up, and level cards between mGBA multiplayer windows as well as real Game Boys Advance and [https://www.analogue.co/pocket Analogue Pockets]. == Changelog == '''v2.1 2024/06/10''' * Allow canceling with B. '''v2.0 2024/06/09''' * implement file picker. * Refresh and refine UI. * Start out in waiting mode after reset. * Add link troubleshooting info to README. '''v1.0 2024/06/10''' * Initial release. == Credits == 4-e wouldn't exist without: * [https://devkitpro.org/wiki/devkitARM devkitARM] * [https://github.com/gbadev-org/gba-makefile-template gba-makefile-template] * GBATEK (specifically the section on [https://problemkaputt.de/gbatek.htm#gbacommunicationports GBA Communication Ports]) * [https://pineight.com/gba/#gbfs GBFS] * [https://mgba.io/ mGBA] == External links == * Author's website - [https://mattiebee.io/52283/introducing-4-e-super-mario-advance-4-e-cards-without-an-e-reader https://mattiebee.io/] * gbfs-web - https://mattiebee.app/gbfs-web * GitHub - https://github.com/mattieb/4-e

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