7. BIOS Setup
90
PC-686BX(NLX)-LV, PC-686BX(NLX)-LVV
Table 7.4. POST Codes < 2 / 5 >
19h Not used
1Ah Not used
1Bh
Initial interrupt vector table. Unless otherwise specified, all hardware interrupts are assigned to
SPURIOUS_INT_HDLR and all software interrupts are assigned to SPURIOUS_soft_HDLR.
1Ch Not used
1Dh Initial EARLY_PM_INIT switch
1Eh Not used
1Fh Load keyboard template. (Notebook platform)
20h Not used
21h Initialize HPM. (Notebook platform)
22h Not used
23h
1. Verify RTC value is valid. For example 5Ah is an invalid value for the RTC minutes field.
2. Load CMOS settings to BIOS stack. If the CMOS checksum is incorrect, use default values.
3. Create the BIOS resource map used by PCI and PnP. If ESCD is enabled, take account of
ESCD legacy data.
4. Initialize on-board clock generator. Disable clock resources and set PCI slots and DIMM slots
empty.
5. Perform initial PCI initialization.
- List PCI bus numbers.
- Allocate memory and I/O resources.
- Search for valid VGA device and VGA BIOS and locate at C000:0.
24h Not used
25h Not used
26h Not used
27h Initialize INT 09 buffer
28h Not used
29h
1. Set the 0 - 640K memory addresses in the MTRR (P6 & PII) in the CPU.
2. Initialize APIC for Pentium class CPUs
3. Set the initial chipset based on the CMOS setup. e.g. On-board IDE controller.
4. Measure CPU speed.
5. Call video BIOS.
2Ah Not used
2Bh Not used
2Ch Not used
2Dh
1. Initialize multilingual.
2. Display Award title, CPU, type, CPU speed, and other information on screen.
2Eh Not used
2Fh Not used
30h Not used
31h Not used
32h Not used
33h Reset keyboard. (Other than for the Winbond 977 series super I/O chip)
34h Not used
35h Not used
POST (hex) Description
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