Re: Erfahrungen mit MB Status Anzeige bei EPOX
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Re: Erfahrungen mit MB Status Anzeige bei EPOX
20.10.2003, 18:54:02
23h 1. Check validity of RTC value:
e.g. a value of 5Ah is an invalid value for RTC minute.
2. Load CMOS settings into BIOS stack. If CMOS 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.
24-26h 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.
2A-2Ch Reserved
2Dh 1. Initialize multi-language
2. Put information on screen display, including Award title,
CPU type, CPU speed ….
2E-32h Reserved
33h Reset keyboard except Winbond 977 series Super I/O chips.
34-3Bh 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
45-46h Reserved
47h Initialize EISA slot
48h Reserved
49h 1. Calculate total memory by testing the last double word of
each 64K page.
2. Program writes allocation for AMD K5 CPU.
4A-4Dh Reserved
4Eh 1. Program MTRR of M1 CPU
2. Initialize L2 cache for P6 class CPU & program CPU
with proper cacheable range.
3. Initialize the APIC for P6 class CPU.
4. On MP platform, adjust the cacheable range to smaller
one in case the cacheable ranges between each CPU are
not identical.
4Fh Reserved
50h Initialize USB
51h Reserved
52h Test all memory (clear all extended memory to 0)
53-54h Reserved
55h Display number of processors (multi-processor platform)
56h Reserved
57h 1. Display PnP logo
2. Early ISA PnP initialization
-Assign CSN to every ISA PnP device.
58h Reserved
59h Initialize the combined Trend Anti-Virus code.
5Ah Reserved
5Bh (Optional Feature) Show message for entering AWDFLASH.
EXE from FDD (optional)
5Ch Reserved
5Dh 1. Initialize Init_Onboard_Super_IO switch.
2. Initialize Init_Onbaord_AUDIO switch.
5E-5Fh Reserved
60h Okay to enter Setup utility; i.e. not until this POST stage can
users enter the CMOS setup utility.
61-64h Reserved
65h Initialize PS/2 Mouse
Appendix
66h Reserved
67h Prepare memory size information for function call:
INT 15h ax=E820h

greetz

glockman B-)

- Ich beiße nicht, ich schau nur so aus -

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