Trivia: The OPTi FineLink 82C861 chipset was used for the onboard USB on tray load iMacs, as well as a few other early USB Macs, from memory.
But yeah - NJRoadfan's right - any OHCI compliant USB card should work. Just stay away from VIA based cards. (found that out the hard way)
But yeah - NJRoadfan's right - any OHCI compliant USB card should work. Just stay away from VIA based cards. (found that out the hard way)