Acer X5950, X3950 manual DIM Code Checkpoints, Acpi Runtime Checkpoints

Checkpoint	Description
B1	Save system context for ACPI.
00	Passes control to OS Loader (typically INT19h).
61-70	OEM POST Error. This range is reserved for chipset vendors and system
	manufacturers. The error associated with this value may be different from one
	platform to the next.

DIM Code Checkpoints

The Device Initialization Manager (DIM) gets control at various times during BIOS POST to initialize different system busses. The following table describes the main checkpoints where the DIM module is accessed.

NOTE: Checkpoints may differ between different platforms based on system configuration. Checkpoints may change due to vendor requirements, system chipset or option ROMs from add-in PCI devices.

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.

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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