Code | Beeps | POST Routine Description |
|
|
|
B1h |
| Inform RomPilot about the end of |
|
| POST. |
|
|
|
B2h |
| POST done- prepare to boot operating |
|
| system |
|
|
|
B4h | 1 | One short beep before boot |
|
|
|
B5h |
| Terminate QuietBoot (optional) |
|
|
|
B6h |
| Check password (optional) |
|
|
|
B7h |
| Initialize ACPI BIOS |
|
|
|
B9h |
| Prepare Boot |
|
|
|
BAh |
| Initialize SMBIOS |
|
|
|
BBh |
| Initialize PnP Option ROMs |
|
|
|
BCh |
| Clear parity checkers |
|
|
|
BDh |
| Display MultiBoot menu |
|
|
|
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 |
|
|
|
C4h |
| Initialize system error handler |
|
|
|
C5h |
| PnPnd dual CMOS (optional) |
|
|
|
C6h |
| Initialize notebook docking (optional) |
|
|
|
C7h |
| Initialize notebook docking late |
|
|
|
C8h |
| Force check (optional) |
|
|
|
C9h |
| Extended checksum (optional) |
|
|
|
CAh |
| Redirect Int 15h to enable remote |
|
| keyboard |
CBh |
| Redirect Int 13h to Memory |
|
| Technologies Devices such as ROM, |
|
| RAM, PCMCIA, and serial disk. |
|
|
|
CCh |
| Redirect Int 10h to enable remote serial |
|
| video |
CDh |
| |
|
|
|
CEh |
| Initialize digitizer and display message. |
|
|
|
D2h |
| Unknown interrupt |
|
|
|
The following are for boot block in Flash ROM | ||
|
|
|
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 |
|
|
|
Chapter 4 | 86 |
