Installation for other Amigas (A500 & A1000) If your machine is not normally equipped with ZorroII and ISA slots, then you will have to figure out what to do. It is possible to attach a GG2 Bus+ to an A500 or A1000 with a Slingshot, or other ZorroII adapter, and then to attach an ISA backplane to the GG2 Bus+, but this arrangement, while possible, is not recommended.