BIOS Architecture Intel® Server Board SE7520BD2 Technical Product Specification
66 Revision 1.3
3.8 ACPI Runtime Checkpoints
ACPI checkpoints are displayed when an ACPI capable operating system either enters or
leaves a sleep state. The following table describes the type of checkpoints that may occur
during ACPI sleep or wake events.
Table 35. ACPI Runtime Checkpoints
Checkpoint Description
AC First ASL check point. Indicates the system is running in ACPI mode.
AA System is running in APIC mode.
01, 02, 03, 04, 05 Entering sleep state S1, S2, S3, S4, or S5.
10, 20, 30, 40, 50 Waking from sleep state S1, S2, S3, S4, or S5.
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