I believe your wrong, but I could be wrong too. I believe a boot ROM chip is still needed. Apple apparently stripped down this ROM a few years back taking out alot of high-level code, but I believe they still have a hardware boot ROM. My guess is the stripped down boot ROM is on a chip since the computer has no access to any drives or devices until some point in the actual running of the code from the boot ROM. Ie. how can it access a software ROM, a software ROM would have to be loaded from the HD?I could be wrong, but I don't think Apple uses hardware ROM any more. Ever since they started making open firmware machines they use software ROM.