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Table 17. | POST Code - Port 80h Codes |
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| Diagnostic LED Decoder |
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| Note: | G=Green, R=Red, |
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Post |
| A=Amber |
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Code |
| MSB |
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| LSB |
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| Description |
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A2h | R |
| Off | A |
| Off |
| Report | second set of POST errors to error messenger. |
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86h |
| R | G | G |
| Off |
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| Prepare And Run Setup: error manager displays and logs POST |
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| errors. Waits for user input for certain errors. Execute setup. | |||||
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8Bh |
| A | Off | G |
| G |
| Set base expansion memory size. | |
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8Ch |
| A | G | Off |
| Off |
| Adjust Setup: programming the Setup options next. | |
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A5h |
| R | G | R |
| G |
| Set display mode. | |
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A7h |
| R | G | A |
| G |
| OEM Patch 12. | |
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A7h |
| R | G | A |
| G |
| Build SMBIOS table and MP tables. | |
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A7h |
| R | G | A |
| G |
| Program hot key and timeout settings in keyboard controller. | |
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A7h |
| R | G | A |
| G |
| Processor initialization before boot. | |
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A7h |
| R | G | A |
| G |
| Copy required language strings to shadow RAM. | |
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AAh | A |
| Off | A |
| Off |
| Clear video screen. | |
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000h | Off | Off | Off |
| Off |
| One beep to indicate end of POST. No beep if silent boot is enabled. | ||
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000h | Off | Off | Off |
| Off |
| POST completed. Passing control to INT 19h boot loader next. | ||
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102 | xSeries 343 Hardware Maintenance Manual |