Code |
Beeps |
Meaning |
01 |
none |
CPU register test in progress. |
02 |
1-1-3 |
CMOS write/read failure. |
03 |
1-1-4 |
ROM BIOS Checksum Failure. |
04 |
1-2-1 |
Programmable interval timer failure. |
05 |
1-2-2 |
DMA Initialisation failure. |
06 |
1-2-3 |
DMA page register write/read failure. |
08 |
1-3-1 |
RAM refresh verification failure. |
09 |
none |
1st 64K RAM test in progress. |
0A |
1-3-3 |
1st 64K RAM chip or data line failure multi-bit. |
0B |
1-3-4 |
1st RAM odd/even logic failure. |
0C |
1-4-1 |
Address line failure 1st 64K RAM. |
0D |
1-4-2 |
Parity failure 1st 64K RAM. |
10 |
2-1-1 |
Bit 0 1st 64K RAM failure. |
11 |
2-1-2 |
Bit 1 1st 64K RAM failure. |
12 |
2-1-3 |
Bit 2 1st 64K RAM failure. |
13 |
2-1-4 |
Bit 3 1st 64K RAM failure. |
14 |
2-2-1 |
Bit 4 1st 64K RAM failure. |
15 |
2-2-2 |
Bit 5 1st 64K RAM failure. |
16 |
2-2-3 |
Bit 6 1st 64K RAM failure. |
17 |
2-2-4 |
Bit 7 1st 64K RAM failure. |
18 |
2-3-1 |
Bit 8 1st 64K RAM failure. |
19 |
2-3-2 |
Bit 9 1st 64K RAM failure. |
1A |
2-3-3 |
Bit A(10) 1st 64K RAM failure. |
1B |
2-3-2 |
Bit B(11) 1st 64K RAM failure. |
1C |
2-4-2 |
Bit C(12) 1st 64K RAM failure. |
1D |
2-4-2 |
Bit D(13) 1st 64K RAM failure. |
1E |
2-4-3 |
Bit E(14) 1st 64K RAM failure. |
1F |
2-4-4 |
Bit F(15) 1st 64K RAM failure. |
20 |
3-1-1 |
Slave DMA register failure. |
21 |
3-1-2 |
Master DMA register failure. |
22 |
3-1-3 |
Master interrupt mask register failure. |
23 |
3-1-4 |
Slave interrupt mask register failure. |
25 |
none |
Interrupt vector loading in progress. |
27 |
3-2-4 |
8042 keyboard controller test failure. |
28 |
none |
CMOS power failure/checksum calculation in progress. |
29 |
none |
CMOS configuration validation in progress. |
2B |
3-3-4 |
Screen memory test failure. |
2C |
3-4-1 |
Screen initialisation failure. |
2D |
3-4-2 |
Screen retrace test failure. |
2E |
none |
Search for video ROM in progress. |
30 |
none |
Screen believed running with video ROM. |
31 |
none |
Mono monitor believed operable. |
32 |
none |
Colour monitor (40 col) believed operable. |
33 |
none |
Colour monitor (80 col) believed operable. |
34 |
4-2-1 |
Timer tick interrupt test in progress or failed (non-fatal). |
35 |
4-2-2 |
Shutdown failure (non-fatal). |
36 |
4-2-3 |
Gate A20 failure (non-fatal). |
37 |
4-2-4 |
Unexpected interrupt in protected mode (non-fatal). |
38 |
4-3-1 |
Mem high address line fail at 01000-0A000 (non-fatal). |
39 |
4-3-2 |
Mem high addr line fail at 100000-FFFFFF (non-fatal). |
3A |
4-3-3 |
Timer chip counter 2 failed (non-fatal). |
3B |
4-3-4 |
Time-of-day clock stopped |
3C |
4-4-1 |
Serial port test |
3D |
4-4-2 |
Parallel port test |
3E |
4-4-3 |
Maths coprocessor test |
41 |
low 1-1-2 |
System board select bad |
42 |
low 1-1-3 |
Extended CMOS RAM bad |
