Some older games designed for the Amiga 500 may not work with Kickstart 3.0. In these cases, you might need a Kickstart 1.3 ROM kick33180.A500 ) instead. Amiga 1200/AGA - Batocera.linux - Wiki
: It provided native support for internal 2.5-inch IDE hard drives and the A1200's PCMCIA slot, which became essential for modern expansions like CF-to-IDE adapters.
Hey fellow retro computing enthusiasts!
Depending on whether you are using original hardware or an emulator, here is how this feature is utilized: Guide: How to burn a Custom Kickstart 3.9 (incl. 1MB ROM)