| Code |
| Beeps | POST Routine Description |
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D2h |
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| Unknown interrupt |
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| Code |
| Beeps |
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E0h |
|
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| Initialize the chipset |
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E1h |
|
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| Initialize the bridge |
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E2h |
|
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| Initialize the CPU |
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E3h |
|
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| Initialize the system timer |
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E4h |
|
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| Initialize system I/O |
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E5h |
|
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| Check force recovery boot |
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E6h |
|
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| Checksum BIOS ROM |
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E7h |
|
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| Go to BIOS |
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E8h |
|
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| Set Huge Segment |
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E9h |
|
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| Initialize Multi Processor |
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|
EAh |
|
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| Initialize OEM special code |
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EBh |
|
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| Initialize PIC and DMA |
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ECh |
|
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| Initialize Memory type |
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EDh |
|
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| Initialize Memory size |
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EEh |
|
|
| Shadow Boot Block |
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EFh |
|
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| System memory test |
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|
F0h |
|
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| Initialize interrupt vectors |
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F1h |
|
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| Initialize Run Time Clock |
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F2h |
|
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| Initialize video |
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F3h |
|
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| Initialize System Management Mode |
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|
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|
F4h |
| 1 |
| Output one beep before boot |
|
|
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|
F5h |
|
|
| Boot to Mini DOS |
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F6h |
|
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| Clear Huge Segment |
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|
F7h |
|
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| Boot to Full DOS |
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Chapter 4 | 78 |