If you see any errors or inconsistencies, please e-mail me: j-rechel@telus.net
I've exhausted the pins on the PCI Voodoo II card, leaving me with only the motherboards to look at for the remaining pins. The Beige G3 and iMac motherboards are too dissimilar to effectively compare. Needless to say, finding the remaining pins is turning out to be frustrating with my 1984 Radioshack analog multimetre. I'm no engineer, and I don't know anything about the PCI bus. My best idea is to find other iMac Mezzanine cards, such as the TV out or SCSI cards. These may provide the additional information needed.
There is also an issue with the IDSEL, which shorts with AD14 on the iMac Game Wizard. Normally, the IDSEL is shorted with an AD on the motherboard, so I'm still trying to figure this one out.
For those interested in taking up this project, here's the resources I've found:
Icedevil's Mad Hacks Page - PCI 3DFX Voodoo II Pinouts
Another person working on this project.
http://e-www.motorola.com/files/32bit/doc/data_sheet/MPC106EC.pdf
PDF of the iMac's PCI controller. It's the same as the iMac's XPC106ARX66CG, as far as I know. This is essential for testing the motherboard. Finding the correct pin on the reverse side of the CPU card is pretty tricky.
http://www.opti-inc.com/ftp_file/usb1.pdf
PDF of the iMac's PCI-USB bridge. This is somewhat helpful for testing the motherboard as well.
Sorry for the large graphics. Geocities doesn't seem to like large tables.
The information on this site is not guaranteed to be correct, has not been thoroughly tested, and I take no responsibility for your actions as a result.
