On request from mic I wrote two demos, one for 2d capture to VRAM, and one for FIFO display mode. Capture mode is great for taking screenshots on hardware. Fifo demo also shows how to use the master brightness register, to darken/lighten video output. Use up/down keys to change brightness. If you have a gbamp/compatible Chishm lib device, you can capture directly to a BMP file. Easy to use source in this version: