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POST (hex)
Description
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:
2. Load CMOS settings into BIOS stack. If CMOS checksum fails, use
3. Prepare BIOS resource map for PCI & PnP use. If ESCD is valid, take
4. Onboard clock generator initialization. Disable respective clock
5. Early PCI initialization:
24h
Reserved
25h
Reserved
26h
Reserved
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
4. Measure CPU speed.
5. Invoke video BIOS.
2Ah
Reserved
2Bh
Reserved
2Ch
Reserved
e.g. a value of 5Ah is an invalid value for RTC minute.
default value instead.
into consideration of the ESCD's legacy information.
resource to empty PCI & DIMM slots.
-Enumerate PCI bus number
-Assign memory & I/O resource
-Search for a valid VGA device & VGA BIOS, and put it
into C000:0.
IDE controller.
ESM-2740/2743 User's Manual
User's Manual
89
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