BLKD815EPFVU Intel, BLKD815EPFVU Datasheet - Page 143

• Manufacturer Part Number: BLKD815EPFVU
• Manufacturer: Intel

Specifications of BLKD815EPFVU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

5.5 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 92). 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 92.
Beep
1
2
3
4
5
6
7
8
9
10
11
Description
Refresh failure
Parity cannot be reset
First 64 KB memory failure
Timer not operational
Not used
8042 GateA20 cannot be toggled
Exception interrupt error
Display memory R/W error
Not used
CMOS Shutdown register test error
Invalid BIOS (e.g., POST module not found, etc.)
Beep Codes
Error Messages and Beep Codes
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