IBM Aptiva 2170, Hardware Maintenance Service Manual

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Disk Drive Control
There are two items under this parameter: Diskette Drive and Hard Disk Drive.
These items allow you to write-protect the floppy diskette and hard disk drives.
The settings include:
Write Protect All Sectors Disables the write function all sectors of the
diskette or hard disk drive.
Write Protect Boot Sector Disables the write function only on the boot sector
of the diskette or hard disk drive.
Normal Allows the diskette or hard disk drive to function normally. This is the
default setting.
Onboard Floppy Disk Controller This parameter allows you to enable or
disable to onboard floppy disk controller chipset. When set to Enabled, the
controller enables the diskette drive on your computer. When set to Disabled,
the controller deactivates the drive but simultaneously frees IRQ 6 which is
normally assigned to the diskette drive. You may then assign IRQ 6 to another
device.
Onboard IDE Primary Channel This parameter allows you to enable or
disable the onboard IDE primary channel controller. Setting this parameter to
Enabled lets you use the primary IDE connector (IDE 1) to connect up to two
IDE drives. Setting to Disabled deactivates IDE 1 but frees IRQ 14 for the use
of other devices. The default setting is Enabled.
Onboard IDE Secondary Channel This parameter allows you to enable or
disable the onboard IDE secondary channel controller. Setting this parameter
to Enabled lets you use the secondary IDE connector (IDE 2) to connect up to
two IDE drives. Setting to Disabled deactivates IDE 2 but frees IRQ 15 for the
use of other devices. The default setting is Enabled.
Porcessor Serial Number Access
This parameter allows you to select Enable to enable processor serial number
acess on systmes with an Intel pentium III processor. The default setting is
Disable. This parameter setting is only for machine type 2171/2172.
Memory/Cache Options
The Memory/Cache Options menu allows you to configure the Level 1 and
Level 2 caches. Enabling the cache parameters optimize system performance.
Some older applications, however, may not run properly with the caches
enabled. Set the parameters to Disabled when you run these applications.
Disabling the caches will degrade system performance.