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

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Supercard Lite Help

Thread starter Vladjslavs_Dracvlae
Start date Aug 11, 2025
Views 416
Replies 0

Vladjslavs_Dracvlae

New Member

Newbie

Level 1

Aug 11, 2025

Hello everyone. I have a Supercard Lite, which plugs into slot 2 of the Nintendo DS Lite to play GBA games on the NDS Lite.

I haven't used it in a long time, and I don't even remember what I need to do to get it working.

I don't remember if I need to put some software on the Micro SD card along with some ROMs and then insert the Micro SD card into it to get it working.

Anyway, I don't think simply sticking the ROMs on the Micro SD card and inserting the card into it will work.

I couldn't find any software for it, nor a tutorial on how to use it to put my GBA ROMs on it and run them on my DS Lite.

Since it's a bit old, I don't know if anyone here still has a Supercard Lite who could help me with a tutorial or links to the software needed to get it working.

Could anyone help me?