American Megatrends Atlas PCI-II, User Manual

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Atlas PCI-II Motherboard User’s Guide 70
Peripheral Setup,
Continued
Parallel Port Mode This option specifies the parallel port mode. ECP
and EPP are both bidirectional data transfer
schemes that adhere to the IEEE P1284
specifications. The Optimal default setting is
Normal . The Fail-Safe default setting is N/A. The
settings are:
Setting Description
Normal The normal parallel port mode is used.
Extende
d
This setting supports bidirectional transfers on the parallel
port.
EPP The parallel port can be used with devices that adhere to
the Enhanced Parallel Port (EPP) specification. EPP uses
the existing parallel port signals to provide asymmetric
bidirectional data transfer driven by the host device.
ECP The parallel port can be used with devices that adhere to
the Extended Capabilities Port (ECP) specification. ECP
uses the DMA protocol to achieve transfer rates of
approximately 2.5
Mbs. ECP provides symmetric
bidirectional communications.
Parallel Port DMA This option is only available if the setting for the
Parallel Port Mode option is ECP.
The settings are DMA CH (channel) 0, DMA CH 1,
or DMA CH 3 . The Optimal and Fail-Safe default
setting is DMA Ch 0.