I did this to install MorphOS on a PCIe G5 PowerMac Required Hardware Flashing Steps MS-DOS Boot Disk Download I have a pre made disk image here Dos6.22 ATI.img at the prompt type cd ATI then to check the contents type dir You should see ‘X1900GT.ROM’ and ‘ATIFLASH.EXE’ listed. We need to know the adaptor number, type atiflash -i  note the adapter number of the installed X1900 GT, which is identifiable by the ‘R580+’ tag in the middle column. Usually, the adapter number to the far left of the ‘R580+’ will read ‘0’, provided the card was installed to the PC’s first (or only) PCIe x16 slot. Note In the…