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A Error Messages
BIOS Beep Codes
One long beep followed by several short beeps indicates a video problem.
Table 40. Beep Codes
Beeps Port 80h Code Explanation
1-2-2-3 16h BIOS ROM checksum
1-3-1-1 20h Test DRAM refresh
1-3-1-3 22h Test Keyboard Controller
1-3-3-1 28h Autosize DRAM
1-3-3-2 29h Initialize POST Memory Manager
1-3-3-3 2Ah Clear 512 KB base RAM
1-3-4-1 2Ch RAM failure on address line xxxx
1-3-4-3 2Eh RAM failure on data bits xxxx of low byte of memory bus
1-4-1-1 30h RAM failure on data bits xxxx of high byte of memory bus
2-1-2-2 45h POST device initialization
2-1-2-3 46h Check ROM copyright notice
2-2-3-1 58h Test for unexpected interrupts
2-2-4-1 5Ch Test RAM between 512 and 640 KB
1-2 98h Search for option ROMs. One long, two short beeps on checksum failure
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