Quick Start Manual

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Chapter 6: Troubleshooting
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Boot process codes
The table below lists Port-80 codes and explanations displayed during the boot
process. Not all codes are associated with an audio tone (beep). The check point
(CP) column lists the message’s check point as seen by a port 80h card.
CP Beeps Reason
02 Verify Real Mode
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
14 Initialize keyboard controller
16 1-2-2-3 BIOS ROM checksum
18 8254 timer initialization
1A 8237 DMA controller initialization
1C Reset Programmable Interrupt Controller
20 1-3-1-1 Test DRAM refresh
22 1-3-1-3 Test 8742 Keyboard Controller
24 Set ES segment register to 4 GB