A few videos are coming up on the IS Nitro Capture device, including hardware teardowns and a some of the capture results (both AVI and BMP). In the meanwhile, here’s the DIP switch settings for the blue box to get different modes, of particular interest is the AV composite out DIP switch options.
From the IS Nitro Capture Users Manual (Version 2005-01-27)
1 Not used set to OFF
2 Not used set to OFF
3 Not used set to OFF
4 When restoring the IS-Nitro FW, set this to ON. If you are not restoring the firmware, set this to OFF.
5 Toggles between wired and wireless DS Wireless Communication. It is set to OFF for wired communication and ON for wireless communication. This switch can be used when you have purchased the wireless option.
6 Used to set the color of the outside of the LCD Screen, on images output by the AV Cable. Set to OFF for black and ON for gray.
7 When set to ON, the DS Upper Screen and Lower Screen are output as a single image from AVOUT1. When set to OFF, the upper screen is output from AVOUT1.
8 When set to ON, the DS Upper Screen and Lower Screen are output as a single image from AVOUT2. When set to OFF, the upper screen is output from AVOUT2.