Asus Crosshair User Manual
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Debug Code Table
CPUSPEED
. 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.
TESTVRAM
. Initialize multi-language
2. Put information on screen display, including Award title, CPU type, CPU
speed .
RESET KB
Reset keyboard except Winbond 977 series Super I/O chips.
8254TEST
Test 8254
8259MSK
Test 8259 interrupt mask bits for channel .
8259MSK2
Test 8259 interrupt mask bits for channel 2.
8259TEST
Test 8259 functionality.
Reserved
Initialize EISA slot
COUNTMEM
. Calculate total memory by testing the last double word of each 64K page.
2. Program write allocation for AMD K5 CPU.
MP INIT
. Program MTRR of M 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.
USB INIT
Initialize USB
TEST MEM
Test all memory (clear all extended memory to 0)
SHOW MP
Display number of processors (multi-processor platform)
PNP LOGO
. Display PnP logo
2. Early ISA PnP initialization
-Assign CSN to every ISA PnP device.
Reserved
Initialize the combined Trend Anti-Virus code.
SHOW EZF
(Optional Feature)
Show message for entering AWDFLASH.EXE from FDD (optional)
ONBD IO
. Initialize Init_Onboard_Super_IO switch.
2. Initialize Init_Onbaord_AUDIO switch.
EN SETUP
Okay to enter Setup utility; i.e. not until this POST stage can users enter the
CMOS setup utility.
MSINSTAL
Initialize PS/2 Mouse
CHK ACPI
Prepare memory size information for function call: INT 5h ax=E820h
EN CACHE
Turn on L2 cache
SET CHIP
Program chipset registers according to items described in Setup & Auto-
configuration table.
AUTO CFG
. 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”.
INIT FDC
1. Initialize floppy controller
2. Set up floppy related fields in 40:hardware.
CUTIRQ2
(Optional Feature)
Enter AWDFLASH.EXE if :
-AWDFLASH is found in floppy drive.
-ALT+F2 is pressed
DET IDE
Detect & install all IDE devices: HDD, LS20, ZIP, CDROM…..
COM/LPT
Detect serial ports & parallel ports.
DET FPU
Detect & install co-processor