Flight Management Computer
My FMC/CDU is a combination of a 7 inch TFT screen with VGA and HDMI input at resolution 1280 x 720 and the Opencockpits FMC 747 kit.
Actually one would need a 5 inch TFT screen, however these sizes are hard to find with a VGA input. I did not want to use Displays via TV OUT anymore because TV Out is becoming obsolete at most video cards these days. Therefore I moved towards a bigger TFT screen and am using just part of it. The screen quality is perfect.
The 69 keys of the FMC are connected to an Opencockpits USBKeys card. At each key press this card sends an integer code (not a keystroke) to SIOC. In SIOC these codes are used to operate the Level-D 767 FMC key variables provided by lekseecon.