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