A501, yes, as does (IIRC) all trapdoor-slot RAM on the A500. I'm not 100% clear on how Zorro II is implemented on the A500, but it's not through Agnus, so it doesn't suffer from chipset contention.
As far as I remember on the A500 it's is pretty much wired up directly to the CPU and RAM. Been about 18 years since I last saw an A500 PCB up close, though
