Abit IX38 QuadGT User Manual page 80

1. If Early_Init_Onboard_Generator is not defined Onboard clock generator initialization.
Disable respective clock resource to empty PCI & DIMM slots.
26
2. Init onboard PWM
3. Init onboard H/W monitor devices
27 Initialize INT 09 buffer
1. Program CPU internal MTRR (P6 & PII) for 0-640K memory address.
2. Initialize the APIC for Pentium class CPU.
29
3. Program early chipset according to CMOS setup. Example: onboard IDE controller.
4. Measure CPU speed.
2B Invoke Video BIOS
1. Initialize double-byte language font (Optional)
2D
2. Put information on screen display, including Award title, CPU type, CPU speed, full screen
logo.
Reset keyboard if Early_Reset_KB is defined e.g. Winbond 977 series Super I/O chips. See
33
also POST 63.
35 Test DMA Channel 0
37 Test DMA Channel 1.
39 Test DMA page registers.
3C Test 8254
3E Test 8259 interrupt mask bits for channel 1
40 Test 8259 interrupt mask bits for channel 2
43 Test 8259 functionality
47 Initialize EISA slot
1. Calculate total memory by testing the last double word of each 64K page
49
2. Program writes allocation for AMD K5 CPU
1. Program MTRR of M1 CPU
2. Initialize L2 cache for P6 class CPU & program CPU with proper cacheable range
4E
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)
53 Clear password according to H/W jumper (Optional)
55 Display number of processors (multi-processor platform)
Display PnP logo
57 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)
1. Initialize Init_Onboard_Super_IO
5D
2. Initialize Init_Onbaord_AUDIO
Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS setup
60
utility
63 Reset keyboard if Early_Reset_KB is not defined
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
1. Assign resources to all ISA PnP devices
6D
2. Auto assign ports to onboard COM ports if the corresponding item in Setup is set to
"AUTO"
1. Initialize floppy controller
6F
2. Set up floppy related fields in 40:hardware
75 Detect & install all IDE devices: HDD, LS120, ZIP, CDROM ...
5-2 IX38 QuadGT