“If a thing is worth doing. It’s worth doing badly” To get a Macintosh ii system to boot, it needs an Apple Sound Chip (ASC). HOWEVER. If you replace the ASC with an octal buffer and eight pull down resistors to provide 0x00 onto the bus, it’ll boot. This means you only need a single IC from a Macintosh ii system to make a booting system - that being the GLUE