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NAR-7070 User’s Manual
47
Code
Description
08h 1.
Test special keyboard controller for Winbond 977 series Super
I/O chips.
2.
Enable keyboard interface.
09h
Reserved
0Ah
Disable PS/2 mouse interface (optional). Auto detect ports for keyboard & mouse
followed by a port & interface swap (optional). Reset keyboard for Winbond 977 series
Super I/O chips.
0Bh Reserved
0Ch Reserved
0Dh Reserved
0Eh
Test F000h segment shadow to see whether it is R/W-able or not. If test fails, keep
beeping the speaker.
0Fh Reserved
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 MODBINable
by OEM customers.
15h Reeserved
16h Initial
Early_Init_Onboard_Generator
switch.
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.
3.
Prepare BIOS resource map for PCI & PnP use. If ESCD is valid,
take into consideration of the ESCD’s legacy information.
4.
Onboard clock generator initialization. Disable respective clock
resource to empty PCI & DIMM slots.
5.
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.