Well, if you are an electrical engineer like me, they are very interesting
A complete schematic diagram of the FZ-1 with a complete BOM. Signal test points with o-scope prints as well as literature describing the jobs of several of the main IC's.
On a side note, I've been doing some tinkering with the 3DO. Specifically, with the 3DO video output.
We all know that RGB output can be achieved. Unfortunately, as it stands right now the existing solutions for doing so aren't all that stable and/or require the use horizontal frequency doubling hardware such as the XRGB-2.
The reason for this is that the digital RGB signal is available between CLIO and the video encoder and the interpolation from 320X240 to 640X480 is done within the encoder.
Therefore, right now, you can grab the 3-channel digital RGB signal and decode it, but it is only at 320X240 resoution.
I'm working on a scalable interpolating DAC based solution that will allow the 3DO to output a true RGB signal at a
multitiude of resolutions at proper horizontal frequencies. Things get a little tricky with the video timing signals, but it's nothing that a little more time can't overcome.
I'll keep ya guys posted.