Dim Code Checkpoints - ROHS EmETXe-i9652 User Manual

BIOS

3.9.4 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
Checkpoint
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.
2A
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.
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
38 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.
Description
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(Note)