101
| Diagnostic LED Decoder |
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G=Green,R=Red,A=Amber | Description | |||||
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11h | Off | Off | Off | A | Detect Configuration Mode, | |
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| such as CMOS clear. | |
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13h | Off | Off | G | A | Chipset Initialization before | |
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| CMOS initialization. | |
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19h | G | Off | Off | A | Init System Timer: The 8254 | |
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| timer test is over. Starting the | |
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| memory refresh test next. | |
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1Ah | G | Off | G | R | Check Refresh Toggle: The | |
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| memory refresh line is toggling. | |
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| Checking the 15 second on/off | |
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| time next. | |
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23h | Off | Off | A | G | Setup Interrupt Vectors: Reading | |
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| the 8042 input port and | |
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| disabling the MEGAKEY Green | |
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| PC feature next. Making the | |
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| BIOS code segment writable and | |
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| performing any necessary | |
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| configuration before initializing | |
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| the interrupt vectors. | |
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24h | Off | G | R | Off | Before Vector: Configuration is | |
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| required before interrupt vector | |
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| initialization has completed. | |
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| Interrupt vector initialization is | |
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| about to begin. | |
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25h | Off | G | R | G | Init interrupt Vectors: Interrupt | |
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| vector initialization is done. | |
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F2h | R | R | A | R | Initialize SMM handler. Initialize | |
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| USB emulation. | |
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F5h | R | A | R | A | Validate NVRAM areas. Restore | |
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| from backup if corrupted. | |
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