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64 02/18/05 ReVolution User Manual 1.00
I/O Device Configuration Menu
The CPU communicates with external devices such as printers through devices called Input/Output (I/O) ports such
as serial and parallel ports. These I/O devices require the use of system resources such as I/O addresses and
interrupt lines. If these devices are Plug and Play, either the BIOS can allocate the devices during POST, or the
operating system can do it.
If the I/O devices are not Plug and Play, they may require manually setting them in Setup. On some systems, the
chipset manages the communication devices. Other systems have, instead, a separate I/O chip on the motherboard
for configuring and managing these devices.
Many systems allow you to control the configuration settings for the I/O ports.
Select I/O Device Configuration on the Advanced Menu to display this menu and specify how you want to configure
these I/O Devices:
Use the legend keys to make your selections and exit to the Main Menu.
Use the following chart to configure the Input/Output settings:
Feature Options Description
Serial port A:
Serial port B: Disabled
Enabled (Default)
Auto
OS Controlled Disabled turns off the port.
Enabled requires you to enter the base
Input/Output address
and the Interrupt number on the next
line.
Auto makes the BIOS configure the
port automatically during
POST.
OS Controlled lets the PnP Operating
System (such as
Windows 95) configure the port after
POST.
Parallel Port: Disabled
Enabled (Default)
Auto
OS Controlled Disabled turns off the port.
Enabled requires you to enter the base
Input/Output address
and the Interrupt number below.
Auto makes the BIOS auto configure
the port during POST.
OS Controlled lets the PnP Operating
System (such as
Windows 95) configure the port after
POST.
Mode Output only
Bi-directional
ECP (Default)
EPP & ECP
Output only is standard one-way
protocol for a parallel
device.
Bi-directional uses two-way protocol of
an Extended
Capabilities Port (ECP).
Floppy Disk Controller Disabled
Enabled
Auto (Default) Enables the on-board legacy diskette
controller.
Disabled turns off all legacy diskette
drives.
Auto select per BIOS or OS
Use this menu to specify how the I/O (Input and Output) ports are configured:
x
Manually by you.
x
Automatically by the BIOS during POST
x
Automatically by a PnP Operating System such as Windows 95 after the Operating System boots.
Warning:
If you choose the same I/O address or Interrupt for more than one port, the menu displays an asterisk (*) at
the conflicting settings. It also displays this message at the bottom of the menu:
* Indicates a DMA, Interrupt, I/O, or memory resource conflict with another device.
Resolve the conflict by selecting another settings for the devices.