Code | Beeps | POST Routine Description |
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|
|
B9h |
| Prepare Boot |
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|
|
BAh |
| Initialize DMI parameters |
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|
|
BBh |
| Initialize PnP Option ROMs |
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|
|
BCh |
| Clear parity checkers |
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|
|
BDh |
| Display MultiBoot menu |
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|
|
BEh |
| Clear screen (optional) |
|
|
|
BFh |
| Check virus and backup reminders |
|
|
|
C0h |
| Try to boot with INT 19 |
|
|
|
C1h |
| Initialize POST Error Manager (PEM) |
|
|
|
C2h |
| Initialize error logging |
|
|
|
C3h |
| Initialize error display function |
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|
|
C4h |
| Initialize system error handler |
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|
|
C5h |
| PnPnd dual CMOS (optional) |
|
|
|
C6h |
| Initialize notebook docking (optional) |
|
|
|
C7h |
| Initialize notebook docking late |
|
|
|
C8h |
| Force check (optional) |
|
|
|
C9h |
| Extended checksum (optional) |
|
|
|
D2h |
| Unknown interrupt |
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|
|
| Code |
| Beeps |
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|
|
| E0h |
|
|
| Initialize the chipset |
|
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|
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| E1h |
|
|
| Initialize the bridge |
|
|
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| E2h |
|
|
| Initialize the CPU |
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| E3h |
|
|
| Initialize the system timer |
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| E4h |
|
|
| Initialize system I/O |
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| E5h |
|
|
| Check force recovery boot |
|
|
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|
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| E6h |
|
|
| Checksum BIOS ROM |
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|
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|
|
| E7h |
|
|
| Go to BIOS |
|
|
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|
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| E8h |
|
|
| Set Huge Segment |
|
|
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|
|
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| E9h |
|
|
| Initialize Multi Processor |
|
|
|
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|
|
|
|
| EAh |
|
|
| Initialize OEM special code |
|
|
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|
|
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| EBh |
|
|
| Initialize PIC and DMA |
|
|
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|
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|
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| ECh |
|
|
| Initialize Memory type |
|
|
|
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|
|
|
| EDh |
|
|
| Initialize Memory size |
|
|
|
|
|
|
|
|
| EEh |
|
|
| Shadow Boot Block |
|
|
|
|
|
|
|
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| EFh |
|
|
| System memory test |
|
|
|
|
|
|
|
|
| F0h |
|
|
| Initialize interrupt vectors |
|
|
|
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|
|
|
|
| F1h |
|
|
| Initialize Run Time Clock |
|
|
|
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|
|
|
|
| F2h |
|
|
| Initialize video |
|
|
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|
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|
|
|
| F3h |
|
|
| Initialize System Management Mode |
|
|
|
|
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|
|
| F4h |
| 1 |
| Output one beep before boot |
|
|
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|
Chapter 4 | 109 |
