Displator

The board was developed as an emulator of old gaming platforms (ZX Spectrum, NES, GBA, etc.) powered by the PCI-e bus for the ability to play and view demos on the side cover of the computer case or on a separate monitor.
Details can be seen in the video on YouTube – https://youtu.be/M9h03Oy-EZA.

It’s very cheap to build, amazing in its capabilities, and has a large community.
The emulator supports a large number of peripherals - keyboards, joysticks, memory cards, audio input and output, VGA or HDMI monitor and others, depending on the emulated platform.
The circuit diagram and firmware are taken from the website murmulator.ru. The circuit diagram can be modified for cross-projects and subsequent versions of the Murmulator.