Dell OPTIPLEX E1 Reference And Installation Manual page 58

3-8 Dell OptiPlex E1 Mini Tower Managed PC Reference and Installation Guide
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You cannot manually enter a value; you must choose a setting from the list. If
there is only one setting listed, no other settings are available.
The setting that you select may affect the resources available. For example, if you
are offered the Disabled setting and select it, all resource values are blank, indi-
cating that a disabled setting uses no resources.
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For example, when you click the value under DMA, the Options button changes
to the DMA Options button. When you click this button, a smaller dialog box
appears. By clicking the down arrow next to the current resource value, you can
display a list of the available values for the resource.