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Chapter 4 75
82h 1. Call chipset power management hook.
2. Recover the text fond used by EPA logo (not for full screen logo)
3. If password is set, ask for password.
83h Save all data in stack back to CMOS.
84h Initialize ISA PnP boot devices.
85h 1. USB final Initialization
2. NET PC: Build SYSID structure
3. Switch screen back to text mode.
4. Set up ACPI table at top of memory.
5. Invoke ISA adapter ROMs.
6. Assign IRQs to PCI devices
7. Initialize APM
8. Clear noise of IRQs
86h Reserved
87h Reserved
88h Reserved
89h Reserved
90h Reserved
91h Reserved
92h Reserved
93h Read HDD boot sector information for Trend Anti-Virus code
94h 1. Enable L2 cache
2. Program boot up speed
3. Chipset final initialization
4. Power management final initialization
5. Clear screen & display summary table
6. Program K6 write allocation
7 Program P6 class write combining.
95h 1. Program daylight saving
2. Update keyboard LED & typematic rate
96h 1. Build MP table
2. Build & update ESCD
3. Set CMOS century to 20h or 19h
4. Load CMOS time into DOS timer tick
5. Build MSIRQ routing table
FFh Boot attempt (INT 19h)
Checkpoint Description