I have an RGB modded NTSC n64.
I also have a XRGB3 with latest (english) firmware.
I connect the two with a SNES SHVC-010 cable.
I am using the settings for the N64 that are recommended here:
Specifically, B0 FPGA, LPF=off, 7 sharp, A/D=150.
The results are, I can see the n64 output on the screen, but it is scrambled - kind of like the PPV channels used to be scrambled on old cable TV. I can make out screens of mario 64, but just barely. Also, the picture goes in and out of sync and it keeps flashing "15 khz" in the upper right every once in a while.
What am I doing wrong here ?