Just missed the 0.221 branch, but monochrome output for all 8 bit Apple II video modes is now fixed to be correct and compatible with the NTSC decoder in our HLSL shader (both the original and BGFX versions).

To use it, run -video bgfx, change the system configuration monitor type to Black and White.

Next, go to the Sliders menu, change the screen effect to HLSL, set NTSC A and B Value to 0, set NTSC Scanline Duration to 39.1, and set Enable NTSC to On.

That will change this

[Linked Image from rbelmont.mameworld.info]

into this

[Linked Image from rbelmont.mameworld.info]