C128, color palette - how to generate a new one?

[pottendo]

hi,
sorry for the repost - I retry now as a new issue; commenting in an existing one didn't generate any attention. I think this is a pretty easy one.
thanks for any feedback, pottendo

Hi,
I've tried to follow this instruction to generate a palette file for my C128/VDC (PAL version). But the result is wrong.

I'm new to RGB2HDMI, so I apologize upfront - I may have overlooked some information.

Connecting my C128/VDC did start with a flashing pic. I found the the Armstrad CPC profile generated a stable pic and close colors.
The Colors there almost match, but e.g. white (color 2) is too dark, brown (color 10) is yellow and lighgray (Color 16) is almost white.
other colors are close enough for now:

I thought taking Vice Palette is a good starting point - attached a script generating the binary palette; but the file delivers way more wrong colors, repeating several and omitting others. So it's not just the wrong sequence for the VDC (as described for the VIC20):

(the image is a bit too dark, but this comes from the foto)
One can see, that e.g. black is appearing twice and the rest is mostly wrong.

Comparing it with the Armstrad Palette (RGBrgb_(Armstrad).bin), Using hexdump I see that at the end 0x40, 0x00, 0x00, 0x00 is added and the Palette is only repeating once, where my generated one repeats every 16*4 bytes.

So maybe one can enlighten me, what's wrong on my approach. See attached the python script.
If there's a proper C128/VDC palette file outthere, I'd be happy to use it... It's there, as in the screenshots (https://github.com/IanSB/RGBtoHDMI/wiki/Gallery-of-Screencaps) I found a nice C128 palette.

Thanks, pottendo

mkpal.py

Originally posted by @pottendo in #27