Acer Veriton 5800 Veriton 5800/6800/7800 Service Guide (MSI MB) - Page 80

. Checkpoint 23h 24h 25h 26h 27h 28h 29h 2Ah 2Bh 2Ch 2Dh 2Eh 2Fh 30h 31h 32h 33h 34h 35h 36h 37h 38h 39h 3Ah 3Bh Description 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 and VGA BIOS, and put it into C000:0 Reserved Reserved Reserved Initialize INT 09 buffer Reserved 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. Reserved Reserved Reserved 1. Initialize multi-language 2. Put information on screen display, including Award title, CPU type, CPU speed... Reserved Reserved Reserved Reserved Reserved Reset keyboard except Winbond 977 series Super I/O chips. Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved 78 Chapter 4