Code | Beeps | POST Routine Description |
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 |
|
|
|
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 |
