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BEEPCODE.PRS
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1993-12-20
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╬╠╬╠╬╠╬╠╧╧╡
╨╥╥╥╥╥╥╥╥╥╥╥╥╥╥╥╥╥╥╥╥╙ │
╢ Φß∞ ∩Γ-Γε∞∩α≤ΦßδΣ █ │ On some machines, to add to
╢ ßΦε≥ ßΣΣ∩ ΓεπΣ≥ █ │ the confusion, some errors are
╤▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄█ │ reported on screen, and others
│ aren't. The list of beep codes
ß√ ∩τΦδ ß⌠±µ │ is useful for the more
│ technically-minded user, to make
John Curtin School │ it possible to rapidly identify
of Medical Research │ the failed component (in theory,
│ anyway!).
│
÷τΣφ √ε⌠ ≤⌠±φ ≤τΣ ∩ε÷Σ± εφ, │ What follows is a list of the
√ε⌠± ∩Γ πεΣ≥ α ∩ε÷Σ±-εφ ≥Σδσ-≤Σ≥≤ │ meanings of these beep codes for
(∩ε≥≤). Φφ ∞αφ√ Γα≥Σ≥, Σ±±ε±≥ │ the AMI, Phoenix, and IBM BIOSes.
α±Σ ΦφπΦΓα≤Σπ ⌠≥Φφµ ßΣΣ∩≥ ±α≤τΣ± │ Most other brands are actually
≤ταφ ß√ πΦ≥∩δα√Φφµ α ∞Σ≥≥αµΣ │ rebadged versions of one of
(this is for historical reasons: │ these, so this may still apply.
the system doesn't assume that │
the display is working at this │ Unfortunately, Award BIOSes
point). │ don't use beep codes at all, so
this won't be of any use to you │ α∞Φ ßΦε≥ α⌠πΦε ∩ε≥≤ ΓεπΣ≥
if you've got such a beast. │
Also, a lot of BIOSes display │ Fatal Errors: all these indicate
numericl error codes on the │ a fatal failure of some kind.
screen, which can be used to │ All of them consist of one or
further pinpoint the cause of a │ more short beeps, as follows.
problem. The last time I saw a │
listing of these codes, it ran to │ ßΣΣ∩≥ Γα⌠≥Σ
ten or more pages, so it hasn't │ 1 DRAM refresh circuit
been reproduced here. If you │ 2 Parity circuit
need this sort of information, │ 3 Base 64K RAM
most books on fixing PC hardware │ 4 System clock
have it. │ 5 CPU
│ 6 A20 line controller
Note that most PC-compatibles │ 7 Virtual mode exception
will beep once to indicate a │ 8 Video memory
successful POST test, prior to │ 9 ROM BIOS checksum
booting the operating system. │
│ Nonfatal Errors: the PC will
│ still boot, but you should
attempt to locate and rectify the │ 1 2 3 DMA read/write error
problem as soon as possible. │ 1 3 1 RAM refresh
│ 1 3 3 Base 64K RAM error
ßΣΣ∩≥ │ 1 3 4 Base 64K RAM logic
long short short short │ 1 4 1 Base 64K RAM addressing
Γα⌠≥Σ │ 1 4 2 Base 64K RAM parity
Memory failure │
│ Any series of beeps beginning
long, repeating short │ with 2 indicates a read/write
Video test failure │ failure in the base 64K RAM; the
│ specific beep code indicates the
∩τεΣφΦ≈ ßΦε≥ α⌠πΦε ∩ε≥≤ ΓεπΣ≥ │ specific bit. However in these
│ days of 1MB and larger SIMMS,
Fatal Errors │ this information is fairly
│ useless....
ßΣΣ∩≥ Γα⌠≥Σ │
1 1 3 CMOS │ ßΣΣ∩≥ Γα⌠≥Σ
1 1 4 ROM BIOS checksum │ 3 1 1 DMA slave controller
1 2 1 System timer │ 3 1 2 DMA master controller
1 2 2 DMA initialisation failed │ 3 1 3 Interrupt master mask
controller │ 4 3 4 Time of day clock
3 1 4 Interrupt slave mask │ 4 4 1 Serial port controller
controller │ 4 4 2 Paralle port controller
3 2 4 Keyboard controller │ 4 4 3 Coprocessor
3 3 4 Video initialisation │ * 1 1 2 System board failure
3 4 1 Screen retrace failure │ * 1 1 3 Extended CMOS RAM
│
│ * These last two are preceded by
Nonfatal Errors │ a lower-pitched beep
│
ßΣΣ∩≥ Γα⌠≥Σ │
4 2 1 Timer interrupt │ Φß∞ ßΦε≥ α⌠πΦε ∩ε≥≤ ΓεπΣ≥
4 2 2 Shutdown test │
4 2 3 A20 controller │ ßΣΣ∩≥ Γα⌠≥Σ
4 2 4 Unexpected interrupt │ 1 System OK
occurred in protected │ 2 Error - code is displayed
mode. │ on screen
4 3 1 RAM failure at an │ 0 Power supply or motherboard
address > FFFFh │ continuous Power supply or
4 3 3 Time channel 2 │ motherboard
long,short Motherboard │
long short short Video │
long short short short Video │
│
│
The codes have been collected │
from sources too numerous to │
mention, over a reasonably │
lengthy period. As a result, │
it's probably pretty accurate, │
but I make no guarantee as to the │
accuracy or usefulness of this │
information: as always, anything │
you do is your responsibility ñ │