https://www.raspberrypi.org/documentation/hardware/computemodule/cmio-display.md The 7" display is almost solely a function of the firmware, not the ARM OS. The ARM OS hasn't been started at the point when things like the rainbow screen are displayed. Having said that the APIs for displaying stuff ...

I have a Raspberry Pi 3 Dev board and Compute Module with a New 7" Official LCD Display. I would like to connect my 7" Official Raspberry Pi Screen to my Dev board to allow me to use it with Windows IOT core. I am struggling to work out the correct pins to connect on between the screen and the dev b...