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CHAPTER 6: Troubleshooting www.gateway.com
88
DIM code checkpoints
The Device Initialization Manager (DIM) gets control at various times during
BIOS POST to initialize different system buses. The following table describes the
main checkpoints where the DIM module is accessed.
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 types of
checkpoints that may occur during ACPI sleep or wake events:
BIOS
The settings in the BIOS Setup utility are not retained
■ Replace the CMOS battery. For instructions, see “Replacing the CMOS
battery” on page 58.
Checkpoint Description
2A Initialize different buses and perform the following
functions:
■
Reset, Detect, and Disable (function 0) — Disables all
device nodes, PCI devices, and PnP ISA cards. It also
assigns PCI bus numbers.
■
Static Device Initialization (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.
■
Boot Output Device Initialization (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) —
Searches for and configures PCI input devices and
detects if system has standard keyboard controller.
■
IPL Device Initialization (function 4) — Searches for
and configures all PnP and PCI boot devices.
■
General Device Initialization (function 5) —
Configures all onboard peripherals that are set to an
automatic configuration and configures all
remaining PnP and PCI devices.
Checkpoint Description
AC First ASL checkpoint. Indicates that 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.