System BIOS configuration 17
IO Device Configuration submenu
Figure 8 IO Device Configuration submenu
Table 7 IO Device Configuration submenu fields
Option Description
Disabled Set this value to prevent the serial port from accessing any system resources.
When this option is set to Disabled, the serial port physically becomes
unavailable.
3F8/IRQ4 Set this value to allow the serial port to use 3F8 as its I/O port address and
IRQ 4 for the interrupt address. This is the default setting. The majority of serial
port 1 or COM1 ports on computer systems use IRQ4 and I/O Port 3F8 as the
standard setting. The most common serial device connected to this port is a
mouse. If the system will not use a serial device, it is best to set this port to
Disabled.
3E8/IRQ4 Set this value to allow the serial port to use 3E8 as its I/O port address and
IRQ 4 for the interrupt address. If the system will not use a serial device, it is
best to set this port to Disabled.
2E8/IRQ3 Set this value to allow the serial port to use 2E8 as its I/O port address and
IRQ 3 for the interrupt address. If the system will not use a serial device, it is
best to set this port to Disabled.
2F8/IRQ3 Set this value to allow the serial port to use 2F8 as its I/O port address and
IRQ 3 for the interrupt address. If the system will not use a serial device, it is
best to set this port to Disabled.
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