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3 = EISA devices.
4 = ISA PnP devices.
5 = PCI devices.
D.4
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:
Checkpoint
AC
AA
01, 02, 03, 04, 05
10, 20, 30, 40, 50
D.5
Memory initialization ERROR Code.
Checkpoint
E1h
E2h
E3h
E4h
EAh
EEh
EFh
F1h
F3h
F4h
F5h
D.6
Beep Codes
The following table describes the beep codes that are used by AMIBIOS:
Description
First ASL check point. Indicates the system is running in ACPI mode.
System is running in APIC mode.
Entering sleep state S1, S2, S3, S4, or S5.
Waking from sleep state S1, S2, S3, S4, or S5.
Description
Memory Error - No memory installed.
Memory Error – Memory type mismatch.
Memory Error – Unsupported DIMM type.
Memory Error – Channel mismatch.
Memory Error – Memory timing error
Memory Error – Memory unsupported size.
Memory Error – Memory population order.
Memory Error – DIMM configuration error.
Memory Error – Error code for unsuccessful Memory Test.
Memory Error – Error code for unsuccessful ECC and Memory Initialization
Memory Error – Receive enable is busted so halt here
Number of Beeps
Description
1
Memory refresh timer error.
2
Parity error
3
Main memory read / write test error.
4
Motherboard timer not operational
D-5
AT8001 User's Guide
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