Thanks for this. Now having replaced C41, C48 and X1 I get some minor improvement. Based on the above I also tried C48 with 100pf and also 220pf (i would say better of the two) but I still get sparkles and/or mode 7 bold mode. I am running VideoNula also btw with regular RGBtoHDMI profile (noting there is a BBC Nula 3bpp profile which seems to make things worse for me).Not specifically about changing the 16MHz crystal, but there is some discussion in the RGBtoHDMI Wiki about changing capacitor C48 to improve Mode 7 display:I do think it's worth fitting a new 16MHz (X1) crystal and reading up about the things that you may want to try to improve the 6MHz clock. Hoglet posted about this in the RGB to HDMI topic. I don't have a link to hand.
https://github.com/hoglet67/RGBtoHDMI/w ... dification
Statistics: Posted by !FOZ! — Sat Jan 31, 2026 4:06 pm