| CHAPTER 4: Troubleshooting |
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Code Beeps | POST Routine Description |
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66h | Configure advanced cache registers |
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67h | Initialize Multi Processor APIC |
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68h | Enable external and CPU caches |
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69h | Setup System Management Mode (SMM) area |
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6Ah | Display external L2 cache size |
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6Bh | Load custom defaults (optional) |
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6Ch | Display |
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6Eh | Display possible high address for UMB recovery |
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70h | Display error messages |
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72h | Check for configuration errors |
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76h | Check for keyboard errors |
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7Ch | Set up hardware interrupt vectors |
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7Eh | Initialize coprocessor if present |
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80h | Disable onboard Super I/O ports and IRQs |
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81h | Late POST device initialization |
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82h | Detect and install external RS232 ports |
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83h | Configure |
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84h | Detect and install external parallel ports |
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85h | Initialize |
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86h | |
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87h | Configure Motherboard Configurable Devices (optional) |
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88h | Initialize BIOS Area |
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89h | Enable |
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8Ah | Initialize Extended BIOS Data Area |
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8Bh | Test and initialize PS/2 mouse |
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8Ch | Initialize floppy controller |
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8Fh | Determine number of ATA drives (optional) |
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90h | Initialize |
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91h | Initialize |
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92h | Jump to UserPatch2 |
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93h | Build MPTABLE for |
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