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 |
|
|
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