User guide

Figure 10–3 Mapping Pages From PCI to VME
ML013377
4 GB Mem Space
2048 x 256K
Pages
512 MB
PCI
A32
VME
A24
A16
Scatter-Gather
Mapping
10.1.1 Outbound Scatter-Gather Mapping
The outbound scatter-gather entries control and map all master accesses from
Digital Alpha VME 4 to the VMEbus. Figure 10–4 shows an outbound scatter-
gather entry and how the VMEbus address is formed from the VME page and the
PCI address.
10–4 VME Interface