Epson Stylus PHOTO 950 User Manual page 276

4. Click the Resources tab, then clear the Use automatic
settings check box. Write down the Input/Output Range
settings shown in the resource settings box.
5. Select a basic configuration setting from the Setting based on
list that uses the same Input/Output Range settings as those
you wrote down in Step 4, and make sure that the Direct
Memory Access channel and Interrupt Request numbers are
allocated and displayed. Confirm also that the Conflicting
device list text box shows No conflicts.
6. Click OK to save the settings.
7. Reopen the Speed & Progress dialog box to verify whether
DMA transfer has been enabled.
Note:
You may not be able to use DMA transfer on some computers even
after you make the settings explained above. Consult your computer
maker for information on the DMA transfer capability of your
computer.
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Increasing the Print Speed