BIOS POST Tone Error Codes
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 | First 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 moe
|
| 4-3-1 | RAM test (address failure >FFFFh)
|
| 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
|
