Stolen from Apple Computer
Instructions on how to get this with a Mac ED, 512Ke or Plus (any mac with a 128K ROM)
- Turn the mac on
- Insert a disk with a bootable system
- When it has started up, press the interrupt button
- Type "G 40E118" (no quotes) and return
- The Stolen from Apple Computer icon will appear on the corner of the screen, like this screenshot shows.
This was built into the ROM for apple technicians to check if the ROM on early mac clones was copied from apple. There is a similar procedure for the Mac SE, but I don't know and I don't have one.