Trenton NTM6900, Техническое описание

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NTM6900 / WTM7026 Technical Reference BIOS Messages
P
OST
C
ODE
C
HECKPOINTS
(C
ONTINUED
)
Checkpoint Description
A7 Display system configuration screen if enabled. Initialize the processor before
boot, which includes the programming of the MTRRs.
A8 Prepare processor for OS boot, including final MTRR values.
A9 Wait for user input at configuration display if needed.
AA Uninstall POST INT1Ch vector and INT09h vector. Deinitialize the ADM module.
AB Prepare BBS for INT19 boot.
AC End of POST initialization of chipset registers.
B1 Save system context for ACPI.
00 Pass control to OS Loader (typically INT19h)
Checkpoint
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:
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, which include manually configured on-board peripherals, memory and
I/O decode windows in PCI-to-PCI bridges and non-compliant PCI devices. Static
resources are also reserved. Function 2 searches for and initializes any PnP, PCI
or AGP video drivers.
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 on-board peripherals that are set to an automatic configuration and configures
all remaining PnP and PCI devices.
A-11 TRENTON Technology Inc.