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5. Troubleshooting
32h
33h
36h
38h
3Ah
3Ch
3Dh
42h
45h
46h
2-1-2-3
48h
49h
4Ah
4Bh
4Ch
4Eh
50h
51h
52h
54h
58h
2-2-3-1
59h
5Ah
5Bh
5Ch
60h
62h
64h
66h
67h
68h
69h
6Ah
6Bh
6Ch
6Eh
70h
72h
76h
7Ch
7Eh
80h
81h
82h
83h
84h
85h
Test the CPU bus-clock frequency
Initialize Phoenix Dispatch Manager
Warm start shutdown
Shadow system BIOS ROM
Auto size cache
Advanced configuration of chipset registers
Load alternate registers with CMOS values
Initialize interrupt vectors
POST device initialization
Check the ROM copyright notice
Check the video configuration against CMOS
Initialize PCI bus and devices
Initialize all video adapters on the system
Quiet Boot start (optional)
Shadow video BIOS ROM
Display the BIOS copyright notice
Display the CPU type and speed
Initialize EISA board
Test the keyboard
Set key click if enabled
Test for unexpected interrupts
Initialize POST display service
Display the prompt "Press F2 to enter SETUP"
Disable CPU cache
Test RAM between 512 and 640 KB
Test extended memory
Test extended memory address lines
Jump to UserPatch1
Configure advanced cache registers
Initialize Multi Processor APIC
Enable external and CPU caches
Setup System Management Mode (SMM) area
Display external L2 cache size
Load custom defaults (optional)
Display shadow-area message
Display possible high address for UMB recovery
Display error messages
Check for configuration errors
Check for keyboard errors
Set up hardware interrupt vectors
Initialize coprocessor if present
Disable onboard Super I/O ports and IRQs
Late POST device initialization
Detect and install external RS232 ports
Configure non-MCD IDE controllers
Detect and install external parallel ports
Initialize PC-compatible PnP ISA devices
5- 6
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