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Hardware Setup 2-19
4E
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
50 Initialize USB
52 Test all memory (clear all extended memory to 0)
55 Display number of processors (multi-processor platform)
57
Display PnP logo
Early ISA PnP initialization
-Assign CSN to every ISA PnP device
59 Initialize the combined Trend Anti-Virus code
5B (Optional Feature) Show message for entering AWDFLASH.EXE from FDD (optional)
5D
1. Initialize Init_Onboard_Super_IO switch
2. Initialize Init_Onbaord_AUDIO switch
60
Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS setup
utility
65 Initialize PS/2 Mouse
67 Prepare memory size information for function call: INT 15h ax=E820h
69 Turn on L2 cache
6B
Program chipset registers according to items described in Setup & Auto-configuration
table
6D
1. Assign resources to all ISA PnP devices
2. Auto assign ports to onboard COM ports if the corresponding item in Setup is set to
“AUTO”
6F
1. Initialize floppy controller
2. Set up floppy related fields in 40:hardware
73
(Optional Feature) Enter AWDFLASH.EXE if:
-AWDFLASH is found in floppy drive
-ALT+F2 is pressed
75 Detect & install all IDE devices: HDD, LS120, ZIP, CDROM …
77 Detect serial ports & parallel ports.
7A Detect & install co-processor
7F
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
82
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
83 Save all data in stack back to CMOS
84 Initialize ISA PnP boot devices
85
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
93 Read HDD boot sector information for Trend Anti-Virus code
User’s Manual