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Chapter 4 71
02h Reserved
03h Initial Superio_Early _Init switch
04h Reserved
05h 1. Blank out screen
2. Clear CMOS error flag
06h Reserved
07h 1. Clear 8042 interface
2. Initialize 8042 self-test
08h 1. Test special keyboard controller for Win bond 977 series Super I/O chips.
2. Enable keyboard interface.
09h Reserved
0Ah 1. Disable PS/2 mouse interface (optional)
2. Auto detect ports for keyboard & mouse followed by a port & interface swap
(optional).
3. Reset keyboard for Win bond 977 series Super I/Q 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 Reserved
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
Checkpoint Description