Megadrive VDP replacement - Pal Console - 315 5313
Hello, after extensive work on this megadrive, I have come to conclude that the bright whites going yellow and the bright blues going green are due to dac issues within the VDP chip, examples are the fade in on road rash blue skies on the preview pictures turn green once the fade is mostly complete. Dark blues remain fine such as the dark blue bike
I recapped the system, I checked with other megadrive that one is fine cables are fine timings for pal are right etc.
I read DC from the RGB pins on road rash value approximations when I did it were blue 1.35 green 2.06 red 1.6 or something. My takeaway was that green is by far taking the lead during this scene.
Because this was before any resistors etc am I right in thinking the VDP itself is old/faulty? If so this is a bummer as I do not know where I can get a replacement chip, sometimes faulty megadrives cost like brand new, I have a functional one I like fixing I like repair.
So my question is, are there mods to bypass the vdp for RGB? is there something I can do to work around it? I like tinkering soldering is my new(ish) love and I wish to try what is possible.