I have an Atari 512 STF, and have purchased a modulator for it.
Sadly this fails to work.
to fit the modulator, I had to remove a few components from the modulator area of the motherboard, ie. some diodes, resistors and a transistor.
Do I have to solder any jumpers in that area or other areas for the modulator to work?
The motherboard version is C070523-001 Rev D.
Also, I would like to upgrade the ram, there are empty pads ready to take the new chips, but do I have to set any jumpers for this to work?
I also have a non working 1040STFM version C103414-001 Rev 1.1. motherboard.
I have found all the clock freqs to be correct but there is absolutely no data bus or address bus activity.