I have the correct ROM file for this operating system, but I would like to know what happens when I upgrade to OS 9.2.1 and then to OS 9.2.2. Does the ROM file automatically upgrade?
I did what you suggested. I picked the OS 9.2 as my startup disk although at the present time that is the only operating system I have on my computer. I zapped the pram, rebuilt the desktop, and ran TechTool Pro 3.09. By the way it came back with a clean bill of health. I do have TechTool Pro 4 ordered, and I am planning to install OS X 10.1 then the upgrades, which I already have, to make it 10.1.5.
I don't know what happened before. The installation disk for my OS 9.2 is for an iMac, but the same ROM file is used for both computers.