IBM Aptiva Hardware Maintenance Manual page 50

Reset Resource Assignments
Set this parameter to Yes to avoid IRQ conflict when installing non-Plug and
Play cards.
Before you install non-Plug and Play cards, set this parameter to Yes, exit
Setup and turn off the computer. This clears all resource assignments and
allows BIOS to reassign resources to all installed Plug and Play devices the
next time the system boots. After clearing the resource data, the parameter
resets to the default setting No.
General Information 1-33