You're wanting to put an SD card slot in the game cartridge? I've actually considered something similar with a hidden wifi dongle.mr.john_doe wrote:Thank you. And another question. He uses a cardridge to extend the SD-Slot. Is it possible to cover a small USB-Hub there? Or in the battery casing? I think a bluetooth and wireless lan adaptor would be great (maybe optional with a switch).
In theory it should work. You'd just need to solder to four traces and then solder the corresponding pins to the usb hub
As for the PCB controller board, did you check our buy/sell forum? I haven't been very active over there (have all my parts).