BIOS Setup Information
PEB-7431VL User’s Manual
4-25
CODE (hex)
DESCRIPTION
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
28h Reserved
29h
Program CPU internal MTRR (P6 & PII) for 0-640K memory
address. Initialize the APIC for Pentium class CPU. Program early
chipset according to CMOS setup. Example: onboard IDE controller.
Measure CPU speed. Invoke video BIOS.
2Ah Reserved
2Bh Reserved
2Ch Reserved
2Dh
Initialize multi-language. Put information on screen display,
including Award title, CPU type, CPU speed ….
2Eh Reserved
2Fh Reserved
30h Reserved
31h Reserved
32h Reserved
33h
Reset keyboard except Winbond 977 series Super I/O chips.
34h Reserved
35h Reserved
36h Reserved
37h Reserved
38h Reserved
39h Reserved
3Ah Reserved
3Bh Reserved
3Ch Test
8254
3Dh Reserved
3Eh
Test 8259 interrupt mask bits for channel 1.
3Fh Reserved
40h
Test 8259 interrupt mask bits for channel 2.
41h Reserved
42h Reserved
43h
Test 8259 functionality.
44h Reserved
45h Reserved
46h Reserved
47h Initialize
EISA
slot