High Quality Content by WIKIPEDIA articles! Autoconfig is an auto-configuration feature of Amiga computers which assigns resources to expansion devices without the need for jumpers. It is analogous to PCI configuration. When the computer is switched on, AmigaOS interrogates each expansion device in turn and assigns address space as needed. In the case of a memory card, the OS would also add the memory to the available system memory. Autoconfig also supports boot ROMs. Expansion devices respond to certain fixed memory addresses starting at hexadecimal E80000 (or FF000000 for Zorro III) if the /CFGIN signal is asserted and the device is not already configured. The CPU reads nibbles of configuration information (usually supplied by a PAL) such as manufacturer ID, product ID, and the amount of address space the device requires. The CPU then writes a base memory address to the device (or tells it to "shut up" if for some reason it can't be configured), and the device asserts /CFGOUT.

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