104 |
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| 6 Technical Reference | |
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| Diagnostic LED Decoder |
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G=Green,R=Red,A=Amber | Description |
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Code |
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| LSB |
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4Bh | G | R | G | G | Memory Test: The amount of | |
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| memory above 8 MB has been | |
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| found and verified. Checking for | |
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| a soft reset and clearing the | |
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| memory below 8 MB for the soft | |
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| reset next. If this is a | |
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| situation, going to checkpoint | |
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| 4Eh next. | |
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57h | Off | A | G | A | Chipset hook after memory size. | |
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53h | Off | R | A | A | Display processor cache size. | |
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54h | Off | A | Off | R | Disable parity and nmi | |
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| reporting. | |
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60h | Off | R | R | Off | Test 8237 DMA Controller: The | |
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| DMA page register test passed. | |
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| Performing the DMA Controller | |
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| 1 base register test next. | |
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65h | Off | A | R | G | Init 8237 DMA Controller: The | |
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| DMA controller 2 base register | |
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| test passed. Programming DMA | |
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| controllers 1 and 2 next. | |
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7Fh | G | A | A | A | Extended NMI enable: Extended | |
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| NMI source enabling is in | |
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| progress. | |
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80h | R | Off | Off | Off | Enable Mouse and Keyboard: | |
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| The keyboard test has started. | |
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| Clearing the output buffer and | |
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| checking for stuck keys. Issuing | |
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| the keyboard reset command | |
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| next. | |
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