This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Creating bootable ProDOS diskettes is more bother than creating bootable DOS 3.3 diskettes because ProDOS does not have any way to duplicate itself from memory-- i.e., it has no INIT command. One way to make a new bootable ProDOS diskette is to first use Apple's ProDOS FILER utility or a ProDOS version of Copy II+ to FORMAT a diskette for ProDOS. This creates tracks filled with blank blocks so that the diskette can be used to hold ProDOS files. It also writes boot startup code in Blocks 0 and 1 on Track 0. ProDOS is in a file on a bootable ProDOS disk and so, usually, is the ProDOS 'connection' to BASIC, named "BASIC.SYSTEM". To finish the job you copy BASIC.SYSTEM and PRODOS from some bootable ProDOS disk to the new diskette. Another way is to use Disk Muncher or some other whole-disk copier to copy some bootable ProDOS diskette which includes BASIC.SYSTEM. You can delete any files you don't want from the copy. Things are a bit easier on a IIgs running GS System. In the Finder (the usual GS main 'desktop'), you can insert a blank diskette and let Finder "Initialize" it for ProDOS. Then you can mouse 'drag and drop' PRODOS and BASIC.SYSTEM from a bootable ProDOS disk to your new disk. (Or, even easier, if you have a 'stock' blank bootable ProDOS diskette the same size as your new disk, you can just drag and drop the bootable disk onto your new disk.) Note: If you want to copy the ProDOS used by GS/OS, copy the file P8 from the SYSTEM/ folder and rename it to "PRODOS" on your diskette. ------------------------