I've attached ROM with Abscondee replaced with Mario 1 as an example.

Hey, thank you for that, I removed the header I burnt it on the device and it works nicely, I think will take me a big effort to get up to speed with all that knowledge, I'm an embedded programmer ,so , nothing new there but there is lot of legacy information...too bad...I was already dreaming about a python script that generate menu and roms automatically....

Thank you for the fixes NewRisingSun!

Sadly I haven't got any other device like this but if I get one in my hand I would be happy to dump it.


So...is the content encrypted ? I wanted to make a custom rom with official NES games in it , instead of bootleg ones, I noticed that the roms are saved in "banks" , I tried to replace one with Super Mario Bros. 3 but that did't work (I guess the mapper is unsupported?) perhaps with the emulator now I can try the edits before burning the eeprom

Edit: Nevermind, I re-read your answer, I guess , I either swap the  opcodes in the rom I want to paste in or I disable the scrambling in the eeprom ? (if is even possible?)

Hi , I literally discovered this forum 1 hour ago, I recently received this as a present  :

https://www.thumbsupuk.com/Products/Mini_Arcade_Machine

After 5 minutes of playing I got bored and took it apart, inside there is a blob chip and a w25q64 spi eeprom , I desolder it , throw it in my tl866 universal programmer and dumped the content of it :

https://www.dropbox.com/s/5tt6mpruwtl59ax/mini_arcade.bin?dl=0

I tried to open it in emuVT and nintendulator without a lot of success , I was wondering if someone was able to help me to understand what chip this thing have...

Thanks!