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MVME5100 Single Board Computer Programmer's Reference Guide

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2<br />

Hawk PCI Host Bridge & Multi-Processor Interrupt Controller<br />

PPC Bus Address Space<br />

The PHB maps PPC address space into PCI Memory space using four<br />

programmable map decoders. The most significant 16 bits of the PCI<br />

address is compared with the address range of each map decoder, and if the<br />

address falls within the specified range, the access is passed on to the PPC<br />

bus. An example of this is shown in Figure 2-4.<br />

PCI Bus Address 8 0 8 0 1 2 3 4<br />

31<br />

1615<br />

0<br />

Decode is<br />

>= and

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