Here is firmware updates for the Magic Wild Card.  To do a firmware update, follow these steps

  1. Copy the firmware update file to the root directory of SD card
  2. Insert device into RAM adapter and power on
  3. When the menu appears, hold Select and Start, then press Up on the directional pad
  4. Dialog box appears and asks you to confirm, press A
  5. Wait for firmware to be updated, Famicom will reboot itself and the menu will reappear shortly.

Firmware build 480 – 04/30/2016

  • Fixed issue with delayed SD card saving
  • Fixed issue where disk side could be changed before SD card was written to