As an addition to our work trying to get the 6600 PCI-E working with PCI Passthrough, I've got a QuickSilver G4 and a couple of Geforce/ Quadro cards.
I've been working on some FCode Roms for them, and I'd like to test them before I flash it to the EEProm, however I don't seem to have the commands correct.
" agp/@10" open-dev to my-self load hd:12,\ppc\4600.rom 800000 1 byte-load
That all returns ok, but the FCode doesn't seem to execute.
Also, I had to strip the PCI Header from the ROM to get the load command to work.
Have a look at this ROM and see if the FCode starts at 0x40, looks like it does to me?