Monochrome VGA driver?
Rayman
Posts: 16,452
Guess this doesn't exist yet...
Thinking this could be useful for the case of RJ45 cable with only 4-P2 pins available.
Thinking pins like this: HSync, VSync, Video, Audio
1080p with mono video and audio isn't great, but probably best can do with only 4 pins...
Comments
Changed title to grayscale to a sec but 1080p would still need external ram. Monochrome looks to be <300kB…
If you need to adapter it to a standard connector at some point anyways, you could put a sync stripper/seperator in there and send Sync-on-Green down the wires instead.
(LMH1980 seems like the part for that)
My driver should do single colour monochrome it if you setup LUT1 colour mode and only wire up to one channel but it wasn't really optimized for this type of output "mode". If you want to use it for text you may need to use this FORCE_MONO_TEXT option IIRC. But for graphics you can use LUT 1bpp, and right now all 3 RGB colour pins get allocated which is probably not what you want if you are doing it to save pins as well as memory. It supports 5, 4 and 3 pin VGA via RGBHV, RGBS and RGsB (sync-on-green) outputs. A 1-pin VGA with SoG would be handy at some point if monitors support it. I had an older paper-white monochrome VGA monitor which might have been good for testing that but it blew up years ago unfortunately. That was a nice little monitor.