Reading about the boot process on floppies for PC-86-DOS and FAT brought me back to the old days of Apple DOS and its track 1/sector 1 boot sequence. I wrote a

Reading about the boot process on floppies for PC-86-DOS and FAT brought me back to the old days of Apple DOS and its track 1/sector 1 boot sequence. I wrote a custom boot loader for the floppies I made without DOS on them that simply put up a message saying that the disk wasn't bootable (since otherwise the Apple ][ would just keep spinning the disk and never get anywhere). I don't remember if it was set up so that you could swap in a new disk and press a key to boot.