I've been working on an open source pure digital HDMI mod for the Neo Geo MVS, MV1C, and wanted to share it with the community. NeoPico HD uses a Raspberry Pi Pico 2 (RP2350B) to tap the digital video and audio signals directly from the MVS board, before they hit the DACs. The result is a pure digital signal path from the Neo Geo to the display. Features: - 480p HDMI output (240p line-doubled) via pico_hdmi - 15-bit RGB capture directly from NEO-B1 digital outputs - DARK/SHADOW signal support for accurate brightness - Digital audio capture from I2S bus (~55kHz -> 48kHz SRC) - Zero-lag scanline-by-scanline output How it works: - Core 0: PIO captures 18-bit video (RGB555 + DARK + SHADOW) at 6MHz pixel clock - Core 1: HSTX outputs HDMI with audio Data Islands - Hardware interpolator + LUT handles RGB555->RGB565 conversion in a single cycle Hardware needed: - WeAct RP2350B (~$5) - HDMI connector ~20 wires to resistor tap points on MVS Status: The footage is from my prototype board running to a Morph 4K. Also tested on RT4K. Still in active development. I have a custom PCB on order from JLCPCB that I'm waiting to test. Planning to add an FPC connector for easier installation and eventually make it compatible with O-MVS shells. I plan to add AES support in the future, which should just require a daughter board for audio ADC. Links: GitHub: github.com/fliperama86/neopi… PicoHDMI library: github.com/fliperama86/pico_… Feedback welcome!