Regarding the Buster question, I now qoute the manual (
http://www.dcecom.de/pub/Manuals/cv643d.pdf ) under chapter "Troubleshooting":
"It is not possible to operate the CYBERVISION 64/3D with accelerated processor cards, if the motherboard is operated with any other than the original frequency of 25MHz. Overclocking the Busterchip causes the Zorro3 bus to malfunction. We recommend installing a Buster revision 11 for error free functioning of the CYBERVISION 64/3D."