Tutorial How to use e-Reader on 3DS

NewGBAXL

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Running GBA's e-Reader on the Nintendo 3DS!
This isn't too hard to figure out but I figured I might as well make a guide to make it easy to do.

Note that you cannot use the actual e-Reader due to the fact that the 3DS lacks the GBA cartridge slot.

If you do not use AGB_FIRM (native GBA support on 3DS) for whatever reason or you are using a DS or DSi, you can also use this guide for TWiLight Menu++ & GBARunner2. Follow Step (2), then copy the e-Reader save of your choice to the directory of your GBARunner2 saves and rename to *I think* ereader.sav or whatever the name of your ROM is.

Requirements:
FBI
GodMode9
e-Reader GBA ROM

(1) Inject the e-Reader ROM into a .cia
You can use Ultimate GBA VC Injector or New Super Ultimate Injector.
Select the e-Reader ROM.

The injectors incorrectly identify the save type.

I got it to work with NSUI using Flash save type.
  • Short Name: e-Reader
  • Long Name: e-Reader
  • Publisher: Nintendo
upload_2021-6-16_15-26-8.png

If you are using NSUI, delete `Banner text (2)`
image_2021-07-07_122506.png
In case it cannot get the title screen banner, I like to download one from here: http://offlinelistgba.free.fr/index.php

(2) Put the saves on your SD card
Use a GBA emulator for PC and load the e-Reader "cards". Once all cards are loaded and you have unlocked your game, copy the .sav file and put it somewhere you'll remember. And rename it to the name of the unlocked content.

I am not sure if sharing e-Reader saves are against GBAtemp's ToS. Please let me know if they are OK.
I included Air Hockey-e.sav for now.

The file you may have is "GameBoyAdvance(e-cards)05-April-29"
Assuming that that is your source, extract the following and put them in your SD card.
  • Memory Dumps - Mario Party-e (USA).zip
  • Memory Dumps - NES-e (USA).zip
  • Memory Dumps - Pokemon Battle-e (USA).zip
  • Memory Dumps - Pokemon-e TCG (USA).zip
  • Memory Dumps - Promotional (USA, Australia).zip
I made a folder in the root of my SD card simply called "e-Reader saves". Put your .sav files in your SD card somewhere you can find them.

(3) Install the e-Reader.cia
2021-06-16_11-19-26.929_top.png
2021-06-16_11-19-26.929_bot.png


(4) Restoring the e-Reader saves
  • Boot e-Reader. You can only modify the save file of the last opened game.
  • Reboot into GodMode9 (Power off, then Power + Start)
  • Copy the .sav file from your SD card of your choice. ('Y' to copy file)
  • Find agbsave.bin in SYSNAND VIRTUAL
  • Press 'A' on it, -> AGBSAVE OPTIONS -> Inject GBA VC save
Full tutorial on how to restore GBA saves: https://digiex.net/threads/3ds-gba-save-backup-and-restore-with-godmode9.15395/


Every time you want to "change" the e-Reader cards, you must first boot e-Reader (unless it was your last booted GBA game), then shut down & reboot into GodMode9, then restore save of your choice.
 

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Last edited by NewGBAXL,

NewGBAXL

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That's smart. It'll up the functionality of some official and self-made 3DS V-Console games. Bravo!
Thanks! This does not help e-Reader compatible games because they require multiplayer functionality of AGB_FIRM. As far as I know, GBA firmware has not been reverse-engineered to that extent. However, if you want to read Animal Crossing text, or play simple NES games, or a Kirby Slide Puzzle or Air-Hockey, you are in luck!

Again, anyone with (a lot of) patience who wants to troubleshoot and get past the save error screen would help a lot.
 

WG481

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Thanks! This does not help e-Reader compatible games because they require multiplayer functionality of AGB_FIRM. As far as I know, GBA firmware has not been reverse-engineered to that extent. However, if you want to read Animal Crossing text, or play simple NES games, or a Kirby Slide Puzzle or Air-Hockey, you are in luck!

Again, anyone with (a lot of) patience who wants to troubleshoot and get past the save error screen would help a lot.
Stuff like this needs more attention. A fully complete version of this (in terms of multiplayer AGB_FIRM) would be about as cool as wumiibo amiibo emulation (unless you hate amiibo, in which it would be infinitely cooler.)

An idea I had would be to add this as some patcher functionality with NTR stuff to make it work within these programs, or form an XDELTA/IPS patch that lets you use it. I dunno.

But still, great homebrew! I might try this out sometime.
 

NewGBAXL

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I looked into AGB_FIRM further, and there seems to be n emulation layer called 'AgbBg' (& TwlBg for DSi Mode). AgbBg handles Circle Pad, X & Y, sound, etc. TwlBg is how we got widescreen DS games, etc. Correct me if I'm wrong.

So theoretically AgbBg could be patched to send frequencies using NFC. Only problem: this would only allow up to 2 3DS's to play. Still.
 
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WG481

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I looked into AGB_FIRM further, and there seems to be n emulation layer called 'AgbBg' (& TwlBg for DSi Mode). AgbBg handles Circle Pad, X & Y, sound, etc. TwlBg is how we got widescreen DS games, etc. Correct me if I'm wrong.

So theoretically AgbBg could be patched to send frequencies using NFC. Only problem: this would only allow up to 2 3DS's to play. Still.
AgbBg handles all of the system tools? If you can get it to loop into the game itself, then yeah, I suppose it would work.
 
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