Amiga Early Start-up menu

[bloodline]

Zorro 1 and Zorro II are the same thing (and both are little more than an extension of the 68000 bus). The Power Computing  "Zorro4" was just a custom Zorro II

I don't think the Power Computing boad could actually provide Zorro III as the A1200 simply can't provide the required 32bit signals from the Trapdoor slot.

To diagnose as problem with some Amiga hardware requires quite a bit more than a Zorro II slot. :-)

[AMC258]

The only difference I know about between Zorro I and Zorro II is that you cannot have two cards on a Zorro I bus, only one.

BTW, Zorro I can be found on the A1000, and (backwards) on the A500.  Zorro II is only found (stock) in A2000 series.  Zorro III is found only in A3000 and A4000 series, the exception being one A2000 series computer that has Zorro III.  I don't know if any of these actually exist though.