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M440LX Server System Product Guide
215
Table 10-2. Port-80 Codes (continued)
Port 80 Code Reason
18 8254 timer initialization
1A 8237 DMA controller initialization
1C Reset Programmable Interrupt Controller
20 Test DRAM refresh
22 Test 8742 Keyboard Controller
24 Set ES segment register to 4GB
28 Autosize DRAM
2A Clear 512K base RAM
2C RAM failure on address line xxxx*
2E RAM failure on data bits xxxx* of low byte of memory bus
30 RAM failure on data bits xxxx* of high byte of memory bus
32 Test CPU bus-clock frequency
34 Test CMOS
35 RAMInitialize 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
Continued