User’s Guide
BIOS Setup
4-34
POST(hex)
Description
0A
1. Initialize the first 32 interrupt vectors with corresponding
Interrupt handlers Initialize INT no from 33-120 with
Dummy(Suprious) Interrupt Handler
2. Issue CPUID instruction to identify CPU type
3. Early Power Management initialization (OEM specific)
0B
1. Verify the RTC time is valid or not
2. Detect bad battery
3. Read CMOS data into BIOS stack area
4. PnP initializations including (PnP BIOS only)
-Assign CSN to PnP ISA card
-Create resource map from ESCD
5. Assign IO & Memory for PCI devices (PCI BIOS only)
0C
Initialization of the BIOS Data Area (40 : 0N
−
40:FF)
0D
1. Program some of the Chipset value according to Setup.
(Early Setup Value Program)
2. Measure CPU speed for display & decide the system clock
Speed
3. Video initialization including Monochrome, CGA, EGA/VGA.
If no display device is found, the speaker will beep
0E
1. Initialize the APIC (Multi-Processor BIOS only)
2. Test video RAM (If Monochrome display device found)
3. Show messages including:
-Award Logo, Copyright string, BIOS Date code & Part No.
-OEM specific sign on messages
-Energy Star Logo (Green BIOS ONLY)
-CPU brand, type & speed
-Test system BIOS checksum (Non-Compress Version)
0F
DMA channel 0 test
10
DMA channel 1 test
11
DMA page registers test
12-13
Reserved
14
Test 8254 Timer 0 Counter 2.
15
Test 8259 interrupt mask bits for channel 1
16
Test 8259 interrupt mask bits for channel 2
17
Reserved
19
Test 8259 functionality
1A-1D
Reserved
1E
If EISA NVM checksum is good, execute EISA initialization
(EISA BIOS only)
1F-29
Reserved
30
Detect Base Memory & Extended Memory Size
31
1. Test Base Memory from 256K to 640K
2. Test Extended Memory from 1M to the top of memory
