214
Chapter 10 Solving Problems
POST Codes and Countdown Codes
The BIOS indicates the current testing phase during POST after the video
adapter has been successfully initialized by outputting a 2-digit hex code to
I/O location 80h. If a port-80h ISA card is installed, it displays this 2-digit
code on a pair of hex display LEDs.
Normal Port-80 Codes
These are the port-80 codes and countdown codes displayed during the
normal BIOS POST process.
Table 10-2. Port-80 Codes
Port 80 Code
Reason
02
Verify Real Mode
04
Get CPU type
06
Initialize system hardware
08
Initialize chipset registers with initial POST values
09
Set in POST flag
0A
Initialize CPU registers
0B
Enable CPU cache
0C
Initialize caches to initial POST values
0E
Initialize I/O
0F
Initialize the local bus IDE
10
Initialize Power Management
11
Load alternate registers with initial POST values new
12
Restore CPU control word during warm boot
14
Initialize keyboard controller
16
BIOS ROM checksum
Continued
Summary of Contents for MB440LX
Page 1: ...Intel MB440LX System Installation Guide...
Page 6: ...1 6 Your Chapter Title Goes Here...
Page 16: ...16 Contents...
Page 26: ...26 Chapter 1 Server Description OM05793 Figure 1 4 Security Padlocks...
Page 48: ...48 Chapter 2 Installing The System...
Page 78: ...78 Chapter 3 Configuring The System...
Page 114: ...114 Chapter 4 Working Inside Your System OM05791A 1 2 3 Figure 4 19 Lithium Back up Battery...
Page 116: ...116 Chapter 4 Working Inside Your System OM05268 Figure 4 20 Removing the Front Panel Board...
Page 118: ...118 Chapter 4 Working Inside Your System OM05278 Figure 4 21 Front Panel Fans...
Page 127: ...M440LX Server System Product Guide 127 OM05771 Figure 4 26 Removing the Power Share Backplane...
Page 132: ...132 Chapter 4 Working Inside Your System...
Page 137: ...M440FX Server System Product Guide 137 OM06470 1 2 Figure 5 2 Installing a Hard Disk Drive...
Page 200: ...200 Chapter 9 I O Ports and Connectors...
Page 224: ...224 Chapter 10 Solving Problems...