IBM 865511Y Hardware Maintenance Manual - Page 34

The Parallel Port IRQ field shows the, modes ECP, EPP, ECP and EPP, or

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the address, mode, interrupt, and other settings for the built-in parallel port. The parallel port address can also be set to Disabled if you want to prevent unauthorized transmission of data to devices attached to the port. If you add adapter cards with parallel ports, an error message will notify you if you have an address conflict among the parallel ports. Ensure that each parallel port has a different address. If you change parallel port addresses in this menu, you might also need to make changes in the software that uses parallel ports. For instructions on changing your software, see the information that comes with the software. If the Parallel Port field is not set to Disabled, you can choose an operational mode for the parallel port. You can choose either Standard mode or one of the extended modes (ECP, EPP, ECP and EPP, or Bidirectional). In standard mode, you are limited to write-only (unidirectional) mode. The extended modes are bidirectional and will increase the efficiency of your parallel port; however, the extended modes use recent technology, which is not supported by some hardware. The extended modes are: ECP: The extended capabilities port (ECP) mode provides higher speed data transfers than the Standard mode. The ECP mode is used for high-speed printers and other devices. EPP: The enhanced parallel port (EPP) mode also provides high speed data transfers. The EPP mode is used for LAN adapters, disk drives, and tape backups. ECP and EPP: This mode combines the capabilities of the Extended Capabilities Port and Enhanced Parallel Port modes. Select this mode if you have both ECP and EPP devices connected to the parallel port. Bidirectional: This mode is used for data transfer to other computers and supported devices. The Parallel Port Extended Mode DMA field shows the channel assignment for direct memory access (DMA). The parallel port can use DMA data transfer when the extended mode is set to either ECP or ECP and EPP. The Parallel Port IRQ field shows the interrupt request number. 26 Netfinity Server HMM

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the address, mode, interrupt, and other
settings for the built-in parallel port.
The
parallel port address can also be set to
Disabled if you want to prevent unauthorized
transmission of data to devices attached to
the port.
If you add adapter cards with
parallel ports, an error message will notify
you if you have an address conflict among
the parallel ports.
Ensure that each parallel
port has a different address.
If you change
parallel port addresses in this menu, you
might also need to make changes in the
software that uses parallel ports.
For
instructions on changing your software, see
the information that comes with the software.
If the Parallel Port field is not set to
Disabled, you can choose an operational
mode for the parallel port.
You can choose
either Standard mode or one of the extended
modes (ECP, EPP, ECP and EPP, or
Bidirectional).
In standard mode, you are
limited to write-only (unidirectional) mode.
The extended modes are bidirectional and
will increase the efficiency of your parallel
port; however, the extended modes use
recent technology, which is not supported by
some hardware.
The extended modes are:
±
ECP:
The extended capabilities port
(ECP) mode provides higher speed data
transfers than the Standard mode.
The
ECP mode is used for high-speed
printers and other devices.
±
EPP:
The enhanced parallel port (EPP)
mode also provides high speed data
transfers.
The EPP mode is used for
LAN adapters, disk drives, and tape
backups.
±
ECP and EPP:
This mode combines
the capabilities of the Extended
Capabilities Port and Enhanced Parallel
Port modes.
Select this mode if you
have both ECP and EPP devices
connected to the parallel port.
±
Bidirectional:
This mode is used for
data transfer to other computers and
supported devices.
The Parallel Port Extended Mode DMA field
shows the channel assignment for direct
memory access (DMA).
The parallel port
can use DMA data transfer when the
extended mode is set to either ECP or ECP
and EPP.
The Parallel Port IRQ field shows the
interrupt request number.
26
Netfinity Server HMM