Appendix, Ep-3vwm – EPoX Computer EP-3VWM User Manual

Page 53

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Appendix

B-3

EP-3VWM

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

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 IDE controller.

4. Measure CPU speed.
5. Invoke video BIOS.

2Ah

Reserved

2Bh

Reserved

2Ch

Reserved

2Dh

1. Initialize multi-language
2. 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.

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