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Using the System Setup Program 2-9
The Reserved Memory category has the following options:
None Reserved (the default option)
512KB - 640KB
15MB - 16MB
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CPU Speed indicates the processor speed at which your system boots.
Press the left- or right-arrow key to toggle the CPU Speed
category between the resi-
dent microprocessor’s rated speed (the default) and a lower compatibility speed,
which lets you accommodate speed-sensitive application programs. A change to this
category takes effect immediately (rebooting the system is not required).
To toggle between the rated processor speed and the compatibility speed while the
system is running in real mode, press <Ctrl><Alt><\>. (For keyboards that do not use
American English, press <Ctrl><Alt><#>.)
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Integrated Devices configures the devices integrated into the system board. Press
<Enter> to configure these options.
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Network Interface Controller determines whether an integrated NIC is On, Off, or
On w/ PXE. You must reboot your system before a change takes effect.
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Mouse Port enables or disables the system’s built-in Personal System/2 (PS/2)-
compatible mouse port. Disabling the mouse allows an expansion card to use
interrupt request (IRQ) 12.
For more information about built-in ports, port designations, IRQs, and the remapping
of ports, see “Connecting External Devices” in your online
System User’s Guide
.
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Serial Port 1 and Serial Port 2 configure the system’s built-in serial ports. These cate-
gories can be set to Auto (the default option) to automatically configure a port, to a
particular designation (COM1 or COM3 for Serial
Port
1; COM2 or COM4 for Serial
Port 2), or to Off
to disable the port.
If you set a serial port to Auto and add an expansion card containing a port configured
to the same designation, the system automatically remaps the built-in port to the next
available port designation that shares the same IRQ setting as follows:
COM1 (input/output [I/O] address 3F8h), which shares IRQ4 with COM3, is
remapped to COM3 (I/O address 3E8h).