@twvd @gloriouscow Most of the other ROM patches NOP out accesses to unsupported devices or replace code by jumps to additional emulation support, which I still have to analyse.My overall aim is to get an overview of patches applied to different ROMs (Mac 128/512, Mac Plus, Mac LC ROMs) by emulators such as Aladin/Spectre (Atari ST), Shapeshifter (Amiga), Sheepshaver, Daydream/Darkmatter (NeXT) and Mini vMac.Ideally, I would love to build a tool to "paravirtualize" the Mac ROM automatically.