When Ppc Devices Are Little Endian; Figure 2-7. Big To Little Endian Data Swap - Motorola MVME2400 Series Programmer's Reference Manual

D0 D1
D7 D6
D0 D1
Figure 2-7. Big- to Little- Endian Data Swap
When PPC Devices are Little-Endian
When all PPC devices are operating in Little-Endian mode, the originating
address is modified to remove the exclusive-ORing applied by PPC60x
processors. Note that no data swapping is performed. Address
modification happens to the originating address regardless of whether the
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D2 D3 D4 D5 D6
D5 D4 D3 D2 D1
D2 D3 D4 D5 D6
D7 D6 D5 D4 32-bit PCI
D3 D2 D1 D0
Functional Description
D7
PPC Bus
D0
64-bit PCI
D7 PPC Bus
1916 9610
2-39
2