IBM Aptiva 2174, Hardware Maintenance Service

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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 enabled or
disabled 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.
NOTE: While the primary IDE connector set to Enabled, the onboard IDE
secondary channel will be non-configurable.
Onboard IDE Secondary Channel This parameter allows you to enabled or
disabled 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.
Memory/Cache Options
The Memory/Cache Options menu allows you to configure system cache.
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. The default is set to
Enabled.
PnP/PCI Options
The parameters in the PnP/PCI Options menu allows you to set the IRQ
assignments on your PCI devices.
PCI IRQ Setting This parameter allows automatic or manual configuration of
PCI devices. If you use Plug and Play devices, you can keep the default setting
Auto. The system then automatically configures the Plug and Play devices. If
you install non-Plug and Play adapter cards, set this parameter to Manual. This
allows you to assign resources to non-Plug and Play cards first.
PCI IRQ Sharing When set to Yes, this parameter allows you to assign the
same IRQ to more than one PCI device installed in the system. When set to
No, you must assign different IRQs to the PCI devices. The default setting is
No.
Plug and Play Operating System When this parameter is set to Yes, BIOS
initializes only Plug and Play boot devices, then the Plug and Play operating