The only legal way to do this anymore, is to make the disk yourself.
For my A1200, SKICK (freely available on Aminet) is the program I use. It has the rekick table for booting an A1200 with an A500 1.3 kickstart image. The archive has full instructions on how to set up a disk. That's the easy part.
Aminet SKICK linkThe hard part is, this disk will also need a ROM DUMP from an Amiga 500 or 2000 with AmigaDOS 1.3. Worse yet, you need to legally own the A500/2000 to be allowed to use the ROM information in this manner. :-(
Now, that's the only legal way to do it. But the old A500 1.3 kickstart ROM image that can be found on quite a few shady sections of the internet will also work fine in this setup. Just download the SKICK package from Aminet, read docs, setup SKICK, and copy the .rom to the proper spot on your disk.
