I guess a 4MB ROM would just take up space from fast ram if used with a CPU with 24 bit address bus? So why not just load those extra modules into fast ram? Yes, it would need to load them from HDD and it will take a few secs but when would you need that much in ROM before booting from HDD? #8 mentioned AROS but I don't know much about that, except that it sounds like it is a massive resource hog.
