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SRPL8 Server System Product Guide 163
POST Codes and Countdown Codes
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. To view POST codes, you must
install an optional PCI POST add-in board. For more information, contact your customer-service
representative.
Table 16. Port-80 Codes
POST Code Beeps Error
02 Verify Real Mode
03 Disable NMI
04 Get Processor type
06 Initialize system hardware
08 Initialize chip set 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 new
12 Restore processor control word during warm boot
13 Reset PCI bus masters
14 Initialize keyboard controller
16 1-2-2-3 BIOS ROM checksum
17 Prepare to size RAM
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
28 1-3-3-1 Autosize DRAM
29 1-3-3-2 Initialize or call POST Memory Manager
2A Clear 512 KB base RAM
2C 1-3-4-1 RAM failure on address line xxxx
2E 1-3-4-3 RAM failure on data bits xxxx of low byte of memory bus
2F Prepare to shadow system BIOS
30 1-4-1-1 RAM failure on data bits xxxx of high byte of memory bus
32 Test processor bus-clock frequency
33 Initialize the POST Dispatch Manager
34 1-4-2-1 Test CMOS
continued