AMI BIOS Tone POST Codes - Fatal Errors Tone Condition 1 short | DRAM refresh | 2 short | Parity circuit | 3 short | Base 64K RAM | 4 short | System timer | 5 short | Processor | 6 short | Keyboard controller gate A20 | 7 short | Virtual mode exception | 8 short | Display memory read/write test | 9 short | ROM BIOS checksum | 10 short | CMOS shutdown read/write | 11 short | Cache memory |
AMI BIOS Tone POST Codes - Non-Fatal Errors Tone Condition | 1 long, 3 short | Conventional/extended memory | 1 long, 8 short | Display/retrace test |
Phoenix BIOS Tone POST Codes - Fatal Errors Tone Condition None | CPU register test | None | First 64K RAM test | None | Interrupt vector loading proceeding | None | CMOS power failure/checksum calculation | None | Display configuration validation proceeding | None | Display running with video ROM | None | Display functional | None | Mononchrome display functional | None | CGA display functional | 1-1-3 | CMOS write/read | 1-1-4 | ROM BIOS checksum | 1-2-1 | Programmable interval timer | 1-2-2 | DMA Initialization | 1-2-3 | DMA page register write/read | 1-3-1 | RAM refresh verification | 1-3-3 | st 64K RAM chip or data line | 1-3-4 | First 64K RAM odd/even logic | 1-4-1 | Address line first 64K RAM | 1-4-2 | Parity failure first 64K RAM | 2-1-1 | Bit 0, first 64K RAM | 2-1-2 | Bit 1, first 64K RAM | 2-1-3 | Bit 2, first 64K RAM | 2-1-4 | Bit 3, first 64K RAM | 2-2-1 | Bit 4, first 64K RAM | 2-2-2 | Bit 5, first 64K RAM | 2-2-3 | Bit 6, first 64K RAM | 2-2-4 | Bit 7, first 64K RAM | 2-3-1 | Bit 8, first 64K RAM | 2-3-2 | Bit 9, first 64K RAM | 2-3-3 | Bit 10, first 64K RAM | 2-3-4 | Bit 11, first 64K RAM | 2-4-1 | Bit 12, first 64K RAM | 2-4-2 | Bit 13, first 64K RAM | 2-4-3 | Bit 14, first 64K RAM | 2-4-4 | Bit 15, first 64K RAM | 3-1-1 | Slave DMA register | 3-1-2 | Master DMA register | 3-1-3 | Master interrupt mask register | 3-1-4 | Slave interrupt mask register | 3-2-4 | Keyboard controller | 3-3-4 | Display initialization | 3-4-1 | Display retrace | 3-4-2 | Search for video ROM proceeding |
Phoenix BIOS POST Tone Codes - Non-Fatal Errors Tone Condition 4-2-1 | Timer tick interrupt test | 4-2-2 | Shutdown test | 4-2-3 | Gate A20 Failure | 4-2-4 | Unexpected interrupt in protected mode | 4-3-1 | RAM test | 4-3-3 | Interval timer channel 2 | 4-3-4 | Real time clock | 4-4-1 | Serial Port | 4-4-2 | Parallel Port | 4-4-3 | Math Co-processor test | 1-1-2* | System board select | 1-1-3* | Extender CMOS RAM | *audio code pattern preceded by low pitched tone |
IBM POST Tone Codes Tone Condition none | System board, power supply | 1 short | System passed all tests | 2 short | Display error | continuous | System board, power supply | 1 long, 1 short | System board | 1 long, 2 short | Video adapter | 1 long, 3 short | EGA | 3 long | 3270 keyboard card |
Источник: http://www.bios.ru/ | 
