DEC GTX5166M Service Quick Reference Manual page 91

Troubleshooting
Code Beeps POST Routine Description
24 Set ES segment register to 4 GB
28 Autosize DRAM
2A Clear 512K base RAM
2C 3-4-1 Test 512K base address lines
2E 3-4-3 Test 512K base memory
30 Base 64K RAM Error
32 Test CPU bus-clock frequency
34 Test CMOS RAM
35 Initialize alternate chipset registers
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
40 Set Initial CPU speed
42 Initialize interrupt vectors
44 Initialize BIOS interrupts
46 2-1-2-3 Check ROM copyright notice
47 Initialize manager for PCI Option ROMs
48 Check video configuration against CMOS
49 Initialize PCI bus and devices
4-18
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