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The I/O space resource distribution to each I/O Hub depends on the number of
recognized I/O Hubs:
4 CPUMEMRs
There is no limitation for assigning I/O space.
6 or 8 CPUMEMRs
If many expansion cards are installed which require I/O space, the BIOS may
not assign I/O space for all devices. You have to enter the BIOS Setup menu
and to disable the assignment of I/O space for devices that do not need I/O
space under OS operation.
Table 11
lists the I/O space assignment for individual CPU configurations. In the
BIOS Setup menu, you can choose from the following settings for the device per
slot:
Auto: I/O space is assigned when the device requests for it.
Disabled: I/O space is not assigned even if the device requests for it.
If you specify auto, the I/O space is assigned in descending order of the PCI-bus
number within each I/O Hub until no I/O space is left.
44
Technical Manual
D3081, D3131, D3082 (RX900 S1)
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