Original project:
http://uzebox.org/index.php
Download uzebox-master.zip
User's guide: http://uzebox.org/wiki/User_Guide
"Blue" menu: http://uzebox.org/forums/viewtopic.php?f=3&t=520
"Brown" menu: http://uzebox.org/forums/viewtopic.php?f=3&t=9405

Fusebits:
HIGH: D2
LOW: FF
EXT: FF
There are two versions of game loader. One called "blue": Bootloader_0_4_5.hex and another called "brown": Bootloader5.hex
Brown supports SDHC cards, also files can be fragmented.

Connecting cheap NES/SNES 9-pin pad:
"B" button on main menu changes between "Game" and "Menu".
If Your Uzebox starts directly with game (without showing menu), please press B button while powering on Uzebox.