IBM Aptiva 2190, Hardware Maintenance Service, Page: 59 / 165

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let the controller and the CPU perform the complete task by
themselves. This is simpler and more efficient.
Your system suports five modes, numbered from 0 to 4, which
primarily differ in timing. When Auto(default) is selected, the BIOS will
select the best available mode. This is true for the next four setup
items:
1. IDE Primary Master PIO
2. IDE Primary Slave PIO
3. IDE Secondary Master PIO
4. IDE Secondary Slave PIO
Power Management Setup
The Power Management Setup allows you to configure your system to
most effectively save energy while operating in a manner consistent
with your own style of computer use.
ACPI Function
Determines the ACPI function to be enabled or not
.
APM
Allows you to select the type (or degree) of power saving while in the
following modes:
1. Doze Mode
2. Standby Mode
3. Suspend Mode
4. Hard Disk Drive Power Down