6 BIOS Setup
76
SIS-8601-LVA
POST
(hex)
Description
10h Auto detect flash type to load appropriate flash R/W codes into the run time area in F000 for
ESCD & DMI support.
11h Reserved
12h Use walking 1’s algorithm to check out interface in CMOS circuitry. Also set real-time clock
power status, and then check for override.
13h Reserved
14h Program chipset default values into chipset. Chipset default values are MODBIN able by
OEM customers.
15h Reserved
16h Initial onboard clock generator if Early_Init_Onboard_Generator is defined . See also POST
26h .
17h Reserved
18h
Detect CPU information including brand, SMI type (Cyrix or Intel
®
) and CPU level (586 or
686).
19h Reserved
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.
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
.
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