Jens Schoenfeld (from Individual Computers) said that its the official Voltage regulator scheme, used on the Motorola datasheets for the 060. (and very reliable too)
Don't remember the URL.
BTW
"Please note that you can NOT upgrade your Apollo 3/4040 to 68060 with just changing the CPU and flip the jumpers, you HAVE TO get an voltage regulator board and burn a new EPROM too."
from
http://www.canit.se/~glenn/apollo.htmlEDIT- found the scheme
MC68060UM.pdfpage 329 :-D
