|
| POST Tests |
|
|
|
Code | Beeps | POST Routine Description |
96 |
| Clear hugh ES segment register |
98 | Search for option ROMs. One long, two short beeps on checksum failure | |
9A |
| Shadow option ROMs |
9C |
| Set up Power Management |
9E |
| Enable hardware interrupts |
A0 |
| Set time of day |
A2 |
| Check key lock |
A4 |
| Initialize typematic rate |
A8 |
| Erase F2 prompt |
AA |
| Scan for F2 keystroke |
AC |
| Enter SETUP |
AE |
| Clear |
B0 |
| Check for errors |
B2 |
| POST done - prepare to boot operating system |
B4 | 1 | One short beep before boot |
B5 |
| Display MultiBoot menu |
B6 |
| Check password; password is checked before option ROM scan |
B7 |
| ACPI initialization |
B8 |
| Clear global descriptor table |
BC |
| Clear parity checkers |
BE |
| Clear screen (optional) |
BF |
| Check virus and backup reminders |
C0 |
| Try to boot with INT 19 |
C8 |
| Forced shutdown |
C9 |
| Flash Recovery |
D0 |
| Interrupt handler error |
D2 |
| Unknown interrupt error |
D4 |
| Pending interrupt error |
D6 |
| Initialize option ROM error |
D8 |
| Shutdown error |
DA |
| Extended Block Move |
DC |
| Shutdown 10 error |
