Check the integrity of the ROM,BIOS and message
Check Flash type and copy flash write/erase routines
Initialize onboard clock generator
CPU ID and initialize L1/L2 cache
Setup Interrupt
Vector Table
Initialize first 120 interrupt vectors with
SPURIOUS_INT_HDLR and initialize INT 00h-1Fh according
to INT_TBL
Test CMOS and check Battery Fail
Init Heuristic Power Management (HPM)
Early Programming of chipset registers
Init onboard clock generator and sensor
Setup BIOS DATA AREA (BDA)
Chipset programming and CPU Speed detect