Retro is the in thing, and since the early days of the Raspberry Pi, it’s been something of a retro gaming machine. The original Pi offered an analogue-compatible composite video output (the old yellow RCA port) but modern Pis are digital only, which means old-school CRTs lost support, until now.
A detailed post from Raspberry Pi outlines how using the new Digital Parallel Interface (DPI) and a bit of external component magic, it’s possible to recreate a full analogue interlaced video output that can drive old CRT displays; specifically classic VGA and RGB-Scart interfaces.
The solution involves getting the DPI to generate alternate interlaced video fields, do so at the exact frame timing, and generate the sync pulses. This becomes rather involved on the timing side because VGA utilises separate vertical and horizontal sync lines, but Scart uses a composite signal line combining the two. The end result is able to drive old-school CRT monitors in their varied form for an authentic retro experience. Find out more: https://bit.ly/lxf327video
We’re not sure we want to recall those odd Amiga interlaced resolutions!
CREDIT: Raspberry Pi Foundation