6. BIOS Setup
SPI-8150-LVA, SPI-8151-LVA
83
POST
(hex)
Description
1Ah
Reserved
1Bh
Initial interrupts vector table. If no special specified, all H/W interrupts are directed to
SPURIOUS_INT_HDLR & S/W interrupts to SPURIOUS_soft_HDLR & S/W interrupts to
SPURIOUS_osft_HDLR.
1Ch
Reserved
1Dh
Initial EARLY_PM_INIT switch.
1Eh
Reserved
1Fh
Load keyboard matrix (notebook platform)
20h
Reserved
21h
HPM initialization (notebook platform)
22h
Reserved
23h
1.
Check validity of RTC value: e.g. a value of 5Ah is an invalid value for RTC minute.
2.
Load CMOS settings into BIOS stack. If CMOS checksum fails, use default value
instead.
24h
Prepare BIOS resource map for PCI & PnP use. If ESCD is valid, take into consideration
of the ESCD’s legacy information.
25h
Early PCI Initialization:
- Enumerate PCI bus number.
- Assign memory & I/O resource
- Search for a valid VGA device & VGA BIOS, and put it into C000:0.
26h
1.
If Early_Init_Onboard_Generator is not defined Onboard clock generator
initialization. Disable respective clock resource to empty PCI & DIMM slots.
2.
Init onboard PWM.
3.
Init onboard H/W monitor devices.
27h
Initialize INT 09 buffer
28h
Reserved
29h
1.
Program CPU internal MTRR (P6 & PII) for 0~640K memory address.
2.
Initialize the APIC for Pentium class CPU.
3.
Program early chipset according to CMOS setup. Example: onboard IDE controller.
4.
Measure CPU speed.
2Ah
Reserved
2Bh
Invoke video BIOS.
2Ch
Reserved
2Dh
1.
Initialize multi-language
2.
Put information on screen display, including Award title, CPU type, CPU speed ….
