groepaz wrote:edit++: since your numbers differ significantly from what VICE currently uses, could you also tell the ripple range, and the exact VIC (as in the videochip) model?
Now that I have a more decent scope, I will try to get to that. I have already provided the details about the 6560 in a previous post.
well, ideally you make those measurements "blindly" anyway (like marko did) so the impendance of the monitor input is taken out of the equation.... make a small basic program that prints the coloured blocks (or even type them out blindly, which might be a bit error prone though) and then put a probe on pin3 of the VIC...
Actually, the common emitter configuration of video amplifiers used inside the VIC-20/VIC-20cr is really designed to have a load to operate properly. Normally, 75 Ohms impedance.
If the load isn't present, not enough current flows through the transistor and signal deformation occurs. Usually the amplitude becomes excessive and clipping occurs.
Be normal.