Amiga Zorro II
Zorro II is the name of the general purpose expansion bus used by the Amiga 2000 computer. The bus is mainly a buffered extension of the Motorola 68000 bus, with support for bus mastering DMA. The expansion slots use a 100-pin connector and the card form factor is the same as the IBM PC. Zorro II cards implement the Autoconfig protocol for automatic address space assignment (designed before, yet similar to, Plug and Play on the PC).
The Amiga 1000, A500, and A500+ have a mirror image of a single Zorro slot as their main expansion port – a "male" card edge rather than a "female" card edge socket, with left-handed pin configuration. The prototype expansion box for the A1000 was the basis for the initial Amiga 2000A model design.
Zorro II was succeeded by Zorro III, a 32-bit, asynchronous bus.
Memory map
| Address | Size [MByte] | Description |
|
| 0x00 0000 |
2.0 | Chip memory |
| 0x20 0000 |
8.0 | Zorro II memory expansion space |
| 0xA0 0000 |
1.5 | Zorro II I/O expansion space |
| 0xB8 0000 |
3.0 | A2000 motherboard register space |
| 0xE8 0000 |
0.5 | Zorro II I/O |
| 0xF0 0000 |
1.0 | Motherboard ROM |
External links
See also
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| | Amiga models | |
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| | Unofficial 68k models | |
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| | Unofficial PPC models | |
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| | Amiga prototypes | |
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| | Amiga chipsets | |
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| | Amiga custom chips | |
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| | Other hardware | |
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| | General | |
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| | Standards | |
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| | Storage | |
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| | Peripheral | |
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| | Audio | |
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| | Portable | |
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| | Embedded | |
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| Interfaces are listed by their speed in the (roughly) ascending order, so the interface at the end of each section should be the fastest. Category |
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