Drivers and/or the OS can detect the installed devices and determine resource consumption using the defined PCI, legacy PnP BIOS, and/or ACPI BIOS interface functions.
8.3.4 Legacy ISA Configuration
Legacy ISA
8.3.5 Automatic Detection of Video Adapters
The BIOS detects video adapters in the following order:
Offboard PCI
Onboard PCI
The onboard (or offboard) video BIOS is shadowed, starting at address C0000h, and is initialized before memory tests begin in POST. Precedence is always given to offboard devices.
8.4Console Redirection
Console redirection allows users to monitor the
The console redirection feature is most useful in cases where it is necessary to communicate with a processor board, such as the
The BIOS supports redirection of both video and keyboard via a serial link (COM 1 or COM 2). When console redirection is enabled in BIOS setup, local (host server) keyboard input and video output are passed both to the local keyboard and video connections, and to the remote console via the serial link. Keyboard inputs from both sources are considered valid and video is displayed to both outputs. Optionally, the system can be operated without a host keyboard or monitor attached to the system and run entirely via the remote console. Setup and any other
8.5System Management BIOS (SMBIOS)
The
8.6POST CODE LEDS
Four
LED Color Description
R=RED | G=GREEN | O=ORANGE F=OFF |
Bit in the upper nibble is high:
POST CODE 20
I I
Upper Nibble Lower Nibble
61