Peripheral SetupCBI/CGI Technical Reference
Chassis Plans 8-3
For example, if there is one off-board serial port on the ISA Bus and its address is set to
2F8H, Serial Port 1 is assigned address 3F8H and Serial Port 2 is assigned address 3E8H.
Configuration is then as follows:
COM1 - Serial Port 1 (at 3F8H)
COM2 - off-board serial port (at 2F8H)
COM3 - Serial Port 2 (at 3E8H)
OnBoard Parallel Port
This option enables the parallel port on the SBC and establishes the base I/O address for
the port.
The Setup screen displays the system option:
OnBoard Parallel Port Auto
Available options are:
Auto
Disabled
378
278
3BC
When this option is set to Auto, AMIBIOS checks the ISA Bus for off-board parallel
ports. Any parallel ports found on the ISA Bus are left at their assigned addresses. The
on-board Parallel Port is automatically configured with the first available address not
used by an off-board parallel port. The default address assignment order is 3BCH, 378H,
278H. Note that this same assignment order is used by AMIBIOS to place the active
parallel port addresses in lower memory (BIOS data area) for configuration as logical
LPT devices.
Parallel Port Mode
This option specifies the parallel port mode. ECP and EPP are both bidirectional data
transfer schemes which adhere to the IEEE P1284 specifications.
The Setup screen displays the system option:
Parallel Port Mode ECP
Three options are available:
•Normal uses normal parallel port mode.
•EPP allows the parallel port to be used with devices which 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.