Siemens PC 870 Operations Instructions Page 81

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Alarm, error and system messages
12.2 BIOS beep codes
Panel PC 870 V2, Computer Unit
Operating Instructions, Edition 03/2004, CD Documentation and Drivers
12-3
Beep sequence hex Description
1-1-1-3 02 Test whether the CPU is in real mode
1-2-4-1 1C Reset the interrupt controller
4-1-3-2 C9 Checksum test
1-2-1-3 12 Restore the controller register
1-2-1-4 13 PCI Bus Master Reset
1-4-2-3 36 Check shutdown code
1-3-2-1 24 Switch the ES to special mode
1-1-1-4 03 Switch off NMI
1-1-3-3 0A Pre-initialization of the CPU
1-1-2-1 04 Determine the CPU type
3-3-4-3 AE Edit boot flag
1-1-2-3 06 Initialize basic hardware
1-2-3-1 18 Initialize timers
1-1-3-1 08 Initialize the chip set
4-1-2-1 C4 Reset system error message
1-2-1-2 11 Initialize Registry
1-1-4-3 0E Initialize IO
1-1-4-1 0C Initialize cache
1-2-2-3 16 EPROM checksum test
1-2-2-4 17 Initialize external cache before autosizing memory
1-3-3-1 28 Determine RAM size
1-4-3-3 3A Determine cache size
1-3-3-3 2A Set 512 kB base RAM to 0
1-3-4-1 2C Test address channels in basic RAM
1-3-4-3 2E Check first 64 KB in basic RAM
1-3-4-4 2F Initialize external cache before shadowing BIOS
1-4-3-1 38 BIOS shadow
1-3-1-1 20 Refresh circuit test
1-3-3-2 29 Initialize the POST memory manager
1-4-1-4 33 Initialize the dispatch manager
4-1-1-2 C1 Initialize the POST Error Manager
1-1-3-2 09 Start Power On Self Test
1-1-3-3 0A Initialize CPU
1-1-3-4 0B Switch on cache
1-1-4-4 0F Initialize hard disk
1-2-1-1 10 Initialize power management
1-2-2-1 14 Initialize block 8742
1-2-3-3 1A Initialize the DMA circuits
1-2-4-1 1C Reset the interrupt controller
1-4-1-3 32 Determine the clock pulse speed
4-1-1-2 69 Initialize the handler for SMM
1-4-2-1 34 Test the CMOS RAM
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