Intel SC450NX - Server Platform - 0 MB RAM, Product Manual

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Table 30. Port-80 Codes (continued)
Normal Port
80 Codes
Beeps Error
0E Initialize I/O
0F Initialize the local bus IDE
10 Initialize Power Management
11 Load alternate registers with initial POST valuesnew
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 4GB
28 1-3-3-1 Autosize DRAM
2A Clear 512K 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
30 1-4-1-1 RAM failure on data bits xxxx* of high byte of memory bus
32 Test processor bus-clock frequency
34 Test CMOS
35 RAM Initialize alternate chipset registers
36 Warm start shut down
37 Reinitialize the chipset (MB only)
38 Shadow system BIOS ROM
39 Reinitialize the cache (MB only)
3A Autosize cache
3C Configure advanced chipset registers
3D Load alternate registers with CMOS valuesnew
40 Set Initial processor speed new
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
4A Initialize all video adapters in system
4B Display QuietBoot screen
4C Shadow video BIOS ROM
continued