Hi, I have a GBxCart RW + FlashGBX, and I'm trying to write an emulator .sav to a batteryless SRAM repro cart (FlashGBX identifies it as: Save Type: Unlicensed 512K SRAM 64KiB, Cartridge Type: 2006_TSOP_64BALL_6106 with W29GL128SH9B). My emulator save is 131088 bytes ("Pokemon - Emerald Version.zip"; 128KB + 16 byte header I think). Every attempt to write it via FlashGBX ends in either "save file was erased due to corruption" or it reverts to a previous save. I also tried patching a fresh Emerald ROM with the gbarompatcher website (SRAM Batteryless patch) and writing that instead, same result. I dumped the SRAM after making a test save on the cart and ran it through Python to check the sector structure, the magic bytes don't match standard Emerald format (expected 0x08012025, getting values like 0x01006f4f). PKHeX also rejects the dumped .sav with "unsupported file type/size" even though it's 65536 bytes. ("FreshPatched.zip" is a rom and save dump from after I wrote the patched rom to the cart, and "TestSave.zip" is a save on said patched rom up to the point of acquiring a starter, and then saved at Route 101. I progressed to the same point for "OG.zip") Writing to the OG, Patched, and Test-Saved roms through FlashGBX and injections all ended in errors, regardless of how many times I tried to read the bytes and find the save point. At some point in the process, it started saying that the SRAM size was 64KiB even though I could have sworn it was saying 128KiB for a while but then it changed and I don't know how or why that might be. Maybe I'm just going insane. I've been doing trial-and-error for two days now. Questions: What save format does a batteryless SRAM cart like this actually use, and is it compatible with a standard emulator .sav at all? How can I write my save properly to a cart like this? Is there a tool to convert/inject an emulator save into the format this cart expects? Thanks in advance.

PocketNES update, assisted by AI

Krem Quay · 2026-05-13T13:11:26+00:00

Thanks to AI like Gemini and Claude Opus, a person like me who doesn't know anything about coding can add more mappers to PocketNES. Take a look: https://github.com/GamingFanboy365/pocketnes

Toggle sidebar

Hacking menu for e-reader on flashcart

Thread starter Gladuin
Start date Sep 14, 2020
Views 3,175
Replies 2

Gladuin

Active Member

Newcomer

Level 3

Sep 14, 2020

Hello,

I was wondering if there maybe was some homebrew out there that enables you to select e-reader roms and load them into the e-reader bios for use with a flashcart (I have an EZ-FLASH Omega)

Thanks in advance!

Shadow#1

Wii, 3DS Softmod & Dumpster Diving Expert

Member

Level 19

Sep 14, 2020

Gladuin said:
Hello,

I was wondering if there maybe was some homebrew out there that enables you to select e-reader roms and load them into the e-reader bios for use with a flashcart (I have an EZ-FLASH Omega)

Thanks in advance!

Just go get nes roms and play them on a nes emulator for gba

NewGBAXL

Professional Helirin Pilot

Member

Level 9

Jun 16, 2021

You can use a PC emulator to load the e-Cards, then dump a save of e-Reader every time you unlock something.
Load a .sav file of your liking every time you want to load a different set of e-Cards