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SE7221BK1-E Technical Product Specification
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9.7.3.4 DIM Code Checkpoints
The Device Initialization Manager Module gets control at various times during BIOS POST to
initialize different BUSes. The following table describes the main checkpoints where the DIM
module is accessed.
Table 73. DIM Code Checkpoints
Checkpoint Description
2A Initialize different buses and perform the following functions: Reset, Detect, and Disable (function 0);
Static Device Initialization (function 1); Boot Output Device Initialization (function 2). Function 0
disables all device nodes, PCI devices, and PnP ISA cards. It also assigns PCI bus numbers.
Function 1 initializes all static devices that include manual configured onboard peripherals, memory
and I/O decode windows in PCI-PCI bridges, and noncompliant PCI devices. Static resources are
also reserved. Function 2 searches for and initializes any PnP, PCI, or AGP video devices.
38 Initialize different buses and perform the following functions: Boot Input Device Initialization (function
3); IPL Device Initialization (function 4); General Device Initialization (function 5). Function 3 searches
for and configures PCI input devices and detects if system has standard keyboard controller. Function
4 searches for and configures all PnP and PCI boot devices. Function 5 configures all onboard
peripherals that are set to an automatic configuration and configures all remaining PnP and PCI
devices.
9.7.3.5 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 74. 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.