Beep Codes - DEC GTX5166M Service Quick Reference Manual

Phoenix BIOS Test Points
The following is a list of the checkpoint codes written at the start
of each test and the beep codes issued for terminal errors:
Code Beeps POST Routine Description
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
0C Initialize cache 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 Jump to UserPatch0
14 Initialize keyboard controller
16 2-2-3 BIOS ROM checksum
18 8254 timer initialization
1A 8237 DMA controller initialization
1C Reset Programmable Interrupt Controller
20 3-1-1 Test DRAM refresh
22 3-1-3 Test 8742 Keyboard Controller
Troubleshooting
continued
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