Freetech / Flexus motherboard information
This is what I have found on my harddisk, it is by no means complete. I do own a 486F23. I don't know anything specific about the other motherboards. This is all information I have got.
486F23 manual 520k PDF
486F30 settings text
486F38 settings text
586F56 and 586F60 settings text
586F61-PB settings text