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69
POST (hex)
Description
77h:
Detect serial ports & parallel ports.
7Ah
Detect & install co-processor
7Ch:
Init HDD write protect.
7Fh:
Switch back to text mode if full screen logo is supported
-If errors occur, report errors & wait for keys
-If no errors occur or F1 key is pressed to continue
Clear EPA or customization logo.
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. Switch screen back to text mode
87h:
NET PC: Build SYSID Structure.
89h:
1. Assign IRQs to PCI devices
2. Set up ACPI table at top of the memory.
8Bh:
1. Invoke all ISA adapter ROMs
2. Invoke all PCI ROMs (except VGA)
8Dh:
1. Enable/Disable Parity Check according to CMOS setup
2. APM Initialization
8Fh:
Clear noise of IRQs
93h:
Read HDD boot sector information for Trend Anti-Virus
code
94h:
1. Enable
L2
cache
2. Program
Daylight
Saving
3. Program boot up speed
4. Chipset
final
initialization.
5. Power management final initialization
6. Clear screen & display summary table
7. Program K6 write allocation
8. Program P6 class write combining
95h:
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)
