Acer Altos G520 series, Service Manual

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77 Altos G520
DIM Code Checkpoints
The Device Initialization Manager (DIM) 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:
Checkpoint Description
2A
Initialize different buses and perform the following functions:
T
Reset, Detect, and Disable (function 0). Function 0
disables all device nodes, PCI devices,and PnP ISA
cards. It also assigns PCI bus numbers.
T
Static Device Initialization (function 1). 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.
T
Boot Output Device Initialization (function 2). Function
2 searches for and initializes any PnP, PCI, or AGP
video devices.
38
Initialize different buses and perform the following functions:
T
Boot Input Device Initialization (function 3). Function 3
searches for and configures PCI input devices and
detects if system has standard keyboard controller.
T
IPL Device Initialization (function 4). Function 4
searches for and configures all PnP and PCI boot
devices.
T
General Device Initialization (function 5). Function 5
configures all onboard peripherals that are set to an
automatic configuration and configures all remaining
PnP and PCI devices.