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Intel ECB-870 User Manual

Page 111

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ECB-870

ECB-870 User’s Manual 99


POST Code (hex)

Description

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

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.

24h

Reserved

25h

Reserved

26h

Reserved

27h

Initialize INT 09 buffer