I'm curious about this, myself, as I have a Supercard SD and hate the default firmware. I know that you can use TWiLightMenu++ running on a flashcart to install a custom firmware onto a slot-2 card. Maybe looking into that will give you more insight?
Oh. Damn. I'm sure there's a way to reverse-engineer it but not only is that difficult and time-consuming, it's probably also very illegal considering it's a closed-source project.
Also a good point, considering GBARunner2 on DSi is a thing, there are better, more modern slot-2 flashcards, n3DS Virtual Console, and emulation on a lot of platforms exists as well..
Sorry to revive a somewhat old thread. I looked into this today. I first tried to decompile the source, which didn't work. I then decided to look at the physical circuit to see what components were there, it turns out, it uses the MX29LV400TTC-90 4Mbit flash memory, which has very little information about it online. I'm not sure what the binary is compiled with but it's easy to extract the few strings there are. I feel like the work needed to reverse engineer this is beyond my interest. So with that said, if anyone should find this post and are serious about reverse engineering it, feel free to contact me about it to collaborate!
EDIT: After more investigations, I managed to decompile the bin with Ghidra, however, it is too much work for me to do alone. I'm still up for collabing on it though!
EDIT: After more investigations, I managed to decompile the bin with Ghidra, however, it is too much work for me to do alone. I'm still up for collabing on it though!
Last edited by Abbin21,
The supercard loader is not necessarily bad, indeed the amount of effort they had to put into it to have it work half as a well as it did was staggering compared to other flash cart makers. This was as the chips used were way too slow for the GBA so everything then needed extensive patching to now crash/perform at vaguely acceptable speed where other flash cart makers were left to tweak things in a minor way when a new save type appeared (will have to look it up but mostly just a few times a year and stopped fairly early on), find injection points for soft reset/sleep, update their cheat databases and handle the odd trouble game https://gbatemp.net/threads/buying-a-gba-flash-cart-in-2013.341203/page-18#post-4756995 , most of which could probably be borrowed from the homebrew/emulation/Scene/enthusiast worlds or whatever maker made the leap first.
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