High Quality Content by WIKIPEDIA articles! Released as the expansion bus of the Commodore Amiga 3000 in 1990, the Zorro III computer bus was used to attach peripheral devices to an Amiga motherboard. Designed by Commodore International lead engineer Dave Haynie, the 32-bit Zorro III replaced the 16-bit Zorro II bus used in the Amiga 2000. As with the Zorro II bus, Zorro III allowed for true Plug and Play autodetection (similar to the PC's PCI bus) wherein devices were dynamically allocated the resources they needed on boot. Zorro III continued Zorro II's somewhat controversial direct-address design, which was almost impossible to access as ported I/O and ate into CPU address space, a limiting factor for CPUs with 24 bit addressing. The CPU could directly address any Zorro III device as memory, so Zorro memory expansions could be made (and were made) as well as it being possible to use video memory on a video card to be as system RAM.

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