Manual Number: 40110-005-2
Page 79
available address. The default address assignment order is 3F8H, 2F8H, 3E8H, 2E8H. Note that
this same assignment order is used by AMIBIOS to place the active serial port addresses in lower
memory (BIOS data area) for configuration as logical COM devices.
After all addresses have been assigned, any remaining on-board serial ports are disabled.
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 processor board and establishes the base I/O address for
the port. The interrupt used by the Parallel Port may be assigned by a jumper setting.
The Setup screen displays the system option:
OnBoard Parallel Port
Auto
Available options are:
Auto
Disabled
378H
278H
3BCH
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
Normal
Summary of Contents for SB686P Series
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