Welcome to the home of the PSS 680 on the web! You'll find resources for making patches, tutorials for using the functionality like the sequencer to record, and to do basic versions of clip functionality, and the digital synthesizer. It's a great keyboard to learn 2 op FM synthesis on.
As they are very close functionality, the patches will work perfectly with pss 480 also, and the 580 and 780 because the patches are different, any patches using a base sound of 99 will work on those too, as the sine wave patch is at 99 on both.
Also if you'd like check out my youtube channel Jon Jungle's Youtube