i have a mouse connected and a usb stick to check both HID and USB Mass storage support, and an external hard drive on the firewire card.

ive also tried a custom installation for this particular macintosh checking the usb support and the firewire support but nothing happens....

i think it has to do with the mac os rom file, but i havent figured out yet what exactly does it do. i think it somehow replaces the internal rom of the machine and allows support for third paty devices that this machine originaly didnt support.

keep searching..... i hope ill find hardware/macos 9 experts to clear things for me.