4-9 Troubleshooting
POST Codes
The
code displayed using the postcard is shown below
.
CP
Reason
01 Initialize
BMC
02
Verify Real Mode
03 Test
BMC
04
Get Processor type
06
Initialize system hardware
08
Initialize chipset registers with initial POST values
09
Set in POST flag
0A
Initialize Processor registers
0B
Enable Processor 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
12
Restore Processor control word during warm boot
13
Initialize PCI Bus mastering devices
14
Initialize keyboard controller
16
BIOS ROM checksum
17
Initialize external cache before memory autosize
18
8254 timer initialization
1A
8237 DMA controller initialization
1C
Reset Programmable Interrupt Controller
20
Test DRAM refresh
22
Test 8742 Keyboard Controller
24
Set ES segment register to 4GB
28
Autosize DRAM, system BIOS stops execution here if the BIOS does not detect any
usable memory DIMMs
29
Initializes the POST Memory Manager
2A
Clear 8 MB base RAM
2C
Base RAM failure, BIOS stops execution here if entire memory is bad
2E
Test the first 4MB of RAM
2F
Initialize external cache before shadowing
32
Test Processor bus-clock frequency
33
Initializes the Phoenix Dispatch Manager
34 Test
CMOS
35
RAM Initialize alternate chipset registers
36
Warm start shut down
37
Reinitialize the chipset
38
Shadow system BIOS ROM
39
Reinitialize the cache
3A Autosize
cache
3C
Configure advanced chipset registers
3D
Load alternate registers with CMOS values
41
Check unsupported processor
40
Set Initial Processor speed new
42
Initialize interrupt vectors
Summary of Contents for Express 5800
Page 1: ... EXPRESS5800 120Mf S e r v i c e G u i d e ...
Page 2: ......
Page 23: ...3 3 Unit Configuration ...
Page 24: ...3 4 Unit Configuration CABLE CONNECTION LIST ...
Page 36: ...4 12 Troubleshooting ...
Page 38: ...5 2 Preventive Maintenance ...
Page 62: ...6 24 Installing Optional Internal Devices ...
Page 66: ...8 2 Notes ...
Page 67: ...xx ...
Page 68: ... ...