Reply To: OSSC v1.xx series beta firmware

[snax]

Some more experimentation:

• I didn’t realize Line6x uses pixel repetition.  Since this halves the effective horizontal resolution, it’s better to use Line5x if you want to use shadow masks.
• At Line5x, A-Grille and TV masks look fine.  PVM is OK by itself, but it introduces beat patterns when combined with scanlines (since the scanline pattern repeats every five lines and the mask pattern every four)
• I’ve noticed evidence of crosstalk in the green signal path (presumably between the FPGA and the HDMI transmitter?) when using shadow masks in Line5x.  There is pixel static/snow in areas with non-zero green components.  The static is not present on the input; turning off shadow masks fixes it, as does using Line4x.  Presumably the combination of the high pixel clock of Line5x and the frequent pixel value transitions introduced by shadow masks are causing a latent issue to manifest.