Yes, the A500 uses the same ROM as an A600 would, or an A2000/A1500 would. The same is true, to a degree for A2000/1500/500 ROMs over V3 for the A600. (The A600 requires V2.05 or later).
So, if you have a ROM for an A600, it will work in an A500, or any A2000 series (A2000, A1500, A2500. You can also use this in a CDTV, but you will lose much of the functionality of the CDTV in the process.
//R//
