Intel D815EGEWLU Product Specification - Page 115

BIOS Beep Codes

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Error Messages and Beep Codes 5.5 BIOS Beep Codes Whenever a recoverable error occurs during POST, the BIOS displays an error message describing the problem (see Table 84). The BIOS also issues a beep code (one long tone followed by two short tones) during POST if the video configuration fails (a faulty video card or no card installed) or if an external ROM module does not properly checksum to zero. An external ROM module (for example, a video BIOS) can also issue audible errors, usually consisting of one long tone followed by a series of short tones. For more information on the beep codes issued, check the documentation for that external device. There are several POST routines that issue a POST terminal error and shut down the system if they fail. Before shutting down the system, the terminal-error handler issues a beep code signifying the test point error, writes the error to I/O port 80h, attempts to initialize the video and writes the error in the upper left corner of the screen (using both monochrome and color adapters). If POST completes normally, the BIOS issues one short beep before passing control to the operating system. Table 84. Beep Codes Beep Description 1 Refresh failure 2 Parity cannot be reset 3 First 64 KB memory failure 4 Timer not operational 5 Not used 6 8042 GateA20 cannot be toggled 7 Exception interrupt error 8 Display memory R/W error 9 Not used 10 CMOS Shutdown register test error 11 Invalid BIOS (e.g., POST module not found, etc.) 115

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Error Messages and Beep Codes
115
5.5 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 84).
The BIOS also issues a beep code (one long tone followed by two
short tones) during POST if the video configuration fails (a faulty video card or no card installed)
or if an external ROM module does not properly checksum to zero.
An external ROM module (for example, a video BIOS) can also issue audible errors, usually
consisting of one long tone followed by a series of short tones.
For more information on the beep
codes issued, check the documentation for that external device.
There are several POST routines that issue a POST terminal error and shut down the system if they
fail.
Before shutting down the system, the terminal-error handler issues a beep code signifying the
test point error, writes the error to I/O port 80h, attempts to initialize the video and writes the error
in the upper left corner of the screen (using both monochrome and color adapters).
If POST completes normally, the BIOS issues one short beep before passing control to the
operating system.
Table 84.
Beep Codes
Beep
Description
1
Refresh failure
2
Parity cannot be reset
3
First 64 KB memory failure
4
Timer not operational
5
Not used
6
8042 GateA20 cannot be toggled
7
Exception interrupt error
8
Display memory R/W error
9
Not used
10
CMOS Shutdown register test error
11
Invalid BIOS (e.g., POST module not found, etc.)