Lol @ upgradable, yeah right, desolder the chip, stick it in a pic programmer and upgrade that way.
The pic12f629 (if thats used) contains both eeprom and flash memory, so you could have a bootloader in the eeprom which allows you to flash the flashrom by the serial connection
I wait with baited breath to find out where all these wires are going to fit onto this mod? 2 power supply wires, 3 data wires for the Wii serial port, you've used an additional data line for a flashing led, leaves 2 pins free. 5 wires for an SD card writer and an additional one to go somewhere for the photo channel bollocksQUOTE(gbatemp @ Feb 16 2007, 07:40 PM)The extra wire needed for the photo channel is to allow you to update the firmware on the MODCHIP.
SD features will probably be sharing some of the serial connection and using a free pin on the pic to channel select or something... I guess it's possible